BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:The use of polychromatic synchrotron radiation to study fast proce sses in solids. Advantages and challenges. DTSTART;VALUE=DATE-TIME:20200714T080000Z DTEND;VALUE=DATE-TIME:20200714T082000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1017@indico.inp.nsk.su DESCRIPTION:Speakers: Boris Tolochko (Institute of solid state chemistry a nd mechanochemistry)\nTheoretical analysis has been carried out and test e xperiments have been implemented on the use of polychromatic synchrotron r adiation to study fast processes in solids. The obvious benefits and chall enges are outlined.\n\nhttps://indico.inp.nsk.su/event/24/contributions/10 17/ LOCATION: Zoom 890 9721 5207 URL:https://indico.inp.nsk.su/event/24/contributions/1017/ END:VEVENT BEGIN:VEVENT SUMMARY:Radiation stability and hyperfine mode structure of the terahertz NovoFEL DTSTART;VALUE=DATE-TIME:20200713T103000Z DTEND;VALUE=DATE-TIME:20200713T105000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1012@indico.inp.nsk.su DESCRIPTION:Speakers: Vitaly Kubarev (BINP)\nRadiation stability and hyper fine mode structure of the terahertz NovoFEL\n\nhttps://indico.inp.nsk.su/ event/24/contributions/1012/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1012/ END:VEVENT BEGIN:VEVENT SUMMARY:measurements and calculation of induced radioactivity from technol ogical units of the Novosibirsk FEL accelerator-recuperator DTSTART;VALUE=DATE-TIME:20200713T130700Z DTEND;VALUE=DATE-TIME:20200713T130800Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1008@indico.inp.nsk.su DESCRIPTION:Speakers: Tatiana Saluikova (Budker INP SB RAS)\nThe article p rovides estimates and measurements of the levels of induced radioactivity from the technological units of the accelerator-recuperator of Novosibirsk powerful FEL. FEL operates in three modes when the kinetic energy of elec trons reaches 12\, 20\, and 40 MeV. In the range of these energies lies a giant dipole resonance. For control\, copper and stainless steel samples w ere irradiated. Measurements and calculations allow us to estimate the lev els of induced radioactivity and the times of degradation of materials (pr oducts) under the influence of radiation.\n\nhttps://indico.inp.nsk.su/eve nt/24/contributions/1008/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1008/ END:VEVENT BEGIN:VEVENT SUMMARY:The variable period undulator magnetic field measurements and corr ection of the field errors DTSTART;VALUE=DATE-TIME:20200713T130600Z DTEND;VALUE=DATE-TIME:20200713T130700Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1011@indico.inp.nsk.su DESCRIPTION:Speakers: Yaroslav Gorbachev (Budker Institute of Nuclear Phys ics)\nThe new variable period undulator with unique design was developed a nd built recently at Budker INP. It will replace the electromagnetic undul ator being used now at the second FEL of the Novosibirsk FEL facility. As the result the FEL tunability range will be substantially increased. In th is paper we present the results of the undulator magnetic field measuremen ts for different periods as well as discuss the ways to reduce field error s which include magnets sorting\, weakening of undulator edge poles and us ing of steering coils. Results of researches supported by RBRF grant 15-02 -07776 were used in this work.\n\nhttps://indico.inp.nsk.su/event/24/contr ibutions/1011/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1011/ END:VEVENT BEGIN:VEVENT SUMMARY:A Terahertz localized laser discharge as a source of bright VUV li ght DTSTART;VALUE=DATE-TIME:20200714T094000Z DTEND;VALUE=DATE-TIME:20200714T100000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1013@indico.inp.nsk.su DESCRIPTION:Speakers: Alexander Vodopyanov (Institute of Applied Physics R AS)\nThis work describes the prospects of the point-like discharge support ed by focused terahertz NovoFEL radiation as a source of UV and VUV light. This work is partially supported by RFBR grant офи-м № 14-22-02070. \n\nhttps://indico.inp.nsk.su/event/24/contributions/1013/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1013/ END:VEVENT BEGIN:VEVENT SUMMARY:estimates and measurements of photon and neutron radiation doses of the Novosibirsk FEL micron-recuperator DTSTART;VALUE=DATE-TIME:20200713T130800Z DTEND;VALUE=DATE-TIME:20200713T130900Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1014@indico.inp.nsk.su DESCRIPTION:Speakers: Tatiana Salikova (Budker INP SB RAS)\nThe article pr ovides estimates and measurements of the dose rate of photon and neutron r adiation in the accelerator hall for three modes of operation of the Novos ibirsk powerful FEL\, when the maximum kinetic energy of the electrons rea ches 12\, 20 and 40 MeV. During the operation of the micron-recuperator\, photoneutrons are generated and structural elements are activated. Measure ments and calculations allow us to estimate the levels of induced radioact ivity and the times of degradation of materials (products) under the influ ence of radiation.\n\nhttps://indico.inp.nsk.su/event/24/contributions/101 4/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1014/ END:VEVENT BEGIN:VEVENT SUMMARY:Project of the optical scheme for the soft X-ray & VUV beamline at SKIF synchrotron facility DTSTART;VALUE=DATE-TIME:20200713T133000Z DTEND;VALUE=DATE-TIME:20200713T133100Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1035@indico.inp.nsk.su DESCRIPTION:Speakers: Anton Nikolenko (Budker INP SB RAS)\nThe "electronic structure" is modern beamline for methods using the VUV and soft X-rays ( 10–2000 eV) on the 3 GeV ring at the SKIF synchrotron facility. The coll imated PGM scheme based on a modified SX-700 monochromator is used. During monochromatization and transportation from the frontend to the sample\, t he SR beam passes through five reflective elements\, including a plane def lecting mirror and a plane diffraction grating. The remaining three mirror s have a curved shape\, and two of them are interchangeable in order to ch ange the beam path for transportation to one of the end-stations. To reduc e the contribution of high diffraction orders\, it is planned to additiona lly use a four-mirror high orders suppression system. The calculated param eters of optical elements\, estimates of the thermal load on them\, and ca lculations of the spectral resolution of the optical system in different m odes are presented.\n\nhttps://indico.inp.nsk.su/event/24/contributions/10 35/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1035/ END:VEVENT BEGIN:VEVENT SUMMARY:The Application of Advanced X-Ray Diffraction Image Processing Met hods for Study Linear Defects in Silicon Single Crystals DTSTART;VALUE=DATE-TIME:20200715T100000Z DTEND;VALUE=DATE-TIME:20200715T102000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1024@indico.inp.nsk.su DESCRIPTION:Speakers: Denis Zolotov (Shubnikov Institute of Crystallograph y FSRC “Crystallography and Photonics” RAS)\, Irina Dyachkova (FSRC "C rystallography and Photonics" RAS)\nThe visualization and analysis of 3D f ields of elastic displacements of micro-dimensional defects and dislocatio n structures in the volume of single crystals are important in the develop ment of new functional materials. For this purpose\, the X-ray diffraction tomography (XRDT) method is increasingly being used. We use XRDT to study the real structure of different single crystals\, in particular\, to visu alize the spatial location of dislocation half-loops in Si (111) single cr ystal obtained by a four-point bending method [1]. The currently used math ematical algorithms of XRDT data processing are the evolution of absorptio n tomography methods. Thus\, there is a motivation to modify already exist ing algorithms for processing experimental results in order to develop new mathematical software based on them for modeling images of micro-dimensio nal defects in crystals. The tools of X-ray diffraction theory\, as well a s modern methods of digital image processing can be used for interpretatio n of the obtained data. \n \nThe specific feature of XRDT measurements is the impossibility to register a direct beam or its analogue (flatfield correction)\, which could be used to correct the background of the resulti ng projections. In this work\, we propose a statistical method of analyzin g diffraction projections to separate the noise component of the backgroun d (scattered radiation\, dark current of detector\, etc.) from the useful signal. \n \nIn particular\, an approach using antialiasing the backgro und signal with the Hamming's kernel in a 2D implementation has been propo sed. It is proposed to use an algorithm for statistical recognition using Kendall’s rank correlation criterion to recognize the boundaries and pea ks in the images. Kendall’s statistic and the concordation coefficient a re calculated inside the scan window of the specified width. In this case\ , only image trends\, i.e. relative intensity values\, are compared. \n \nThe results of filtration depend to a large extent on the accuracy of n oise dispersion estimation in the raw data. The main quality criterion of the solution is the value of the residual autocorrelation\, which should c orrespond to a sample from a random sequence. The Durbin-Watson autocorrel ation criterion [2] and several semi-empirical criteria based on the analy sis of the curvature of the smoothed curve and the relative value of the s ystematic component in the residues were chosen as the estimation. \n \ nThe application of developed algorithms and software for effective automa tic noise filtering and smoothing of 2D diffraction projections using the criteria of difference autocorrelation significantly improves 3D reconstru ction result of the dislocation half-loops in Si (111) single crystal. \ n \nThis work was supported by Russian Foundation for Basic Research (pro ject 19-02-00556 A) in the part of image processing and the Ministry of Sc ience and Higher Education within the State assignment FSRC “Crystallogr aphy and Photonics” RAS in part of applying tomography algorithms. \nR eferences \n1\\. V. Asadchikov\, A. Buzmakov\, F. Chukhovskii et al\, J. Appl. Cryst. 51\, 1616 (2018). \n2\\. J. Durbin\, Biometrika 58\, 1 (19 71).\n\nhttps://indico.inp.nsk.su/event/24/contributions/1024/ LOCATION: Zoom 890 9721 5207 URL:https://indico.inp.nsk.su/event/24/contributions/1024/ END:VEVENT BEGIN:VEVENT SUMMARY:Comparison of the geochemical profiles of Lake Khindiktykol (Tuva) bottom sediments cores according to the scanning µXRF-SR. DTSTART;VALUE=DATE-TIME:20200713T140200Z DTEND;VALUE=DATE-TIME:20200713T140300Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1812@indico.inp.nsk.su DESCRIPTION:Speakers: Andrey Darin (Sobolev Institute of Geology and Miner alogy SB RAS)\nTwo cores (67 and 105 cm) of high mountain Lake Khindiktyko l (Tuva) bottom sediments were sampling by a hummer gravity corer from dep ths of 64\,7 m in the middle of the lake and of 31\,3 m in the small bay. The upper 170 mm of each core was studied by scanning micro-XRF with synch rotron radiation (µXRF-SR). The analysis was carried out at the experimen tal station "Elemental analysis" in the joined Research Center SSTRC. Expe rimental conditions: excitation energy 23 keV\, dimensions of the exciting radiation beam 1.5 mm in height and 10 mm in width of the sample. The sca nning step was 2 mm in height of the sample. The distributions of more tha n 20 rock-forming and trace elements over the core depth were obtained. Th e distribution of Ti\, Mn\, Fe\, Ni\, Ga\, Y in both cores coincides well. This suggests one source of terrigenous material and similar sedimentatio n rates. Large discrepancies are visible in the distribution of Ca\, As\, Br\, Sr\, Mo. These elements are characteristic of carbonates and biogenic material. The obtained data indicate differences in the sources of matter entering the bottom sediments in different parts of the lake. Additional lithological and geochemical studies are required when choosing bottom sed iments will be used to climatic reconstructions.\nThis work was financiall y supported by the RSF project. № 20-17-00110. The work was done at the joined Research Center SSTRC on the basis of the VEPP-4 - VEPP-2000 comple x at BINP SB RAS\, using equipment supported by project RFMEFI62119X0022.\ n\nhttps://indico.inp.nsk.su/event/24/contributions/1812/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1812/ END:VEVENT BEGIN:VEVENT SUMMARY:Цельнометаллические микроструктур ные элементы управления терагерцовым из лучением DTSTART;VALUE=DATE-TIME:20200713T135600Z DTEND;VALUE=DATE-TIME:20200713T135700Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1836@indico.inp.nsk.su DESCRIPTION:Speakers: Сергей Кузнецов ()\nА.Н. Генце лев1\, С. А. Кузнецов1\,2\,3\, Ф.Н. Дульцев3\,4 \n1 Институт ядерной физики им. Будкера Сиб ирского отделения Российской академии н аук\, 630090\, Новосибирск\, просп. Академика Лаврентьева\, 11\n2 проектно-технологическ ий институт прикладной микроэлектроник и\, 630090\, Новосибирск\, просп. Академика Ла врентьева\, 2/1\n3 Новосибирский государст венный университет\, 630090\, Новосибирск\, у л. Пирогова\, 2 \n4 Институт физики полупро водников им. А.В. Ржанова Сибирского отде ления Российской академии наук (ИФП СО Р АН)\, 630090\, Новосибирск\, просп. Академика Лаврентьева\, 13\n\nОписаны конструкция и с пособы изготовления самонесущих сеточн ых структур\, используемых в качестве кв азиоптических селективных элементов дл я управления электродинамическими хара ктеристиками пучков излучения в диапазо не субтерагерцовых (субТГц) и терагерцов ых (ТГц) частот электромагнитного спектр а (0\,1÷10 ТГц). Толщина изготавливаемых мик роструктур может меняться в диапазоне о т 10 до 1000 мкм. Тонкие структуры изготавли ваются путём плазмохимического травлен ия фольги толщиной 10-30 мкм тяжелых тугоп лавких металлов (в частности вольфрама - W и тантала - Ta) через маску\, сформированн ую посредством фотолитографии. Толстые микроструктуры толщиной 200-1000 мкм изгота вливаются посредством применения глубо кой рентгенолитографии и гальванопласт ики. Толщина самонесущих сеточных струк тур оказывает влияние на АЧХ квазиоптич еских селективных элементов\, что иллюст рируется расчетными графиками спектрал ьной зависимости энергетического коэфф ициента пропускания нулевой дифракцион ной гармоники для высокочастотных фильт ров с шестиугольными отверстиями (сотов ая упаковка)\, характеризующихся различн ой толщиной металла.\n\nПри выполнении ра боты использовалась инфраструктура Цен тра коллективного пользования «Сибирск ий центр синхротронного и терагерцового излучения (СЦСТИ) на базе накопительног о комплекса ВЭПП-3/ВЭПП-4М ИЯФ СО РАН\, под держанного Министерством образования и науки РФ (проект RFMEFI62117X0012).\nКлючевые сло ва: глубокая рентгеновская литография\, L IGA-технология\, плазмохимическое травлен ие\, микроструктуры\, квазиоптические фи льтры\, терагерцовый диапазон.\n\nАлексан др Николаевич Генцелев\,\n630090\, Новосибир ск\, проспект ак. Лаврентьева\, 11\nЕ-mail: ang120 9@mail.ru\; Тел.: (383) 329-41-38\n\nhttps://indico.inp.nsk.su/event/2 4/contributions/1836/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1836/ END:VEVENT BEGIN:VEVENT SUMMARY:“Electronic Structure” beamline 1-6 at SKIF synchrotron facili ty. DTSTART;VALUE=DATE-TIME:20200715T082000Z DTEND;VALUE=DATE-TIME:20200715T084000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1027@indico.inp.nsk.su DESCRIPTION:Speakers: Andrey Bukhtiyarov (Boreskov Institute of Catalysis) \n“Electronic Structure” is a state-of-the-art beamline for methods us ing the Soft X-Rays range (10-2000 eV) at the 3 GeV ring of SKIF synchrotr on facility. At present\, three branch lines is funded\, which will host a n end station for Near Ambient pressure X-Ray Photoelectron Spectroscopy ( NAP XPS)\, Spin-Angle Resolved Photo-Emission Spectroscopy (Spin-ARPES) an d Reflectometry and Metrology. The NAP XPS end station will allow carrying out in situ and operando studies of the composition and electronic struct ure of the active component for a wide range of catalytic systems at eleva ted pressure\; in situ studies of regularities of deactivation/poisoning p rocesses for catalytic systems depending on different conditions (composit ion of the reaction mixture\, temperature\, the presence of toxic agents\, etc.)\; also in situ study of innovative functional materials. Another im portant technique which will be realized on a beam line (the other branch line) is Spin-Angle Resolved Photo-Emission Spectroscopy (Spin-ARPES) end station will allows to study the electronic and spin structure of solids f or applications in nanoelectronics and spintronics. The third end station is Reflectometry and Metrology (the third branch line) end station will be used for certification of spectral optical elements\, focusing elements a nd X-ray detectors\; a reference detector method for absolute calibration of the spectral sensitivity of various kinds of X-ray radiation receivers in the VUV and Soft X-Rays ranges\; a set of metrological techniques for c alibrating the main characteristics of various kinds of X-ray detectors.\n \nhttps://indico.inp.nsk.su/event/24/contributions/1027/ LOCATION: Zoom 890 9721 5207 URL:https://indico.inp.nsk.su/event/24/contributions/1027/ END:VEVENT BEGIN:VEVENT SUMMARY:THz sensing based on subwavelength grating in attenuated total ref lection configuration DTSTART;VALUE=DATE-TIME:20200713T135700Z DTEND;VALUE=DATE-TIME:20200713T135800Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1031@indico.inp.nsk.su DESCRIPTION:Speakers: Oleg Kameshkov (BINP SB RAS)\, Vasily Gerasimov (Bud ker Institute of nuclear physics SB RAS)\nTHz sensing is very important to ol in biological and medical applications. In this paper\, we study the po ssibility of creating a sensor on a subwave grating in the attenuated tota l reflection (Otto) configuration. Using theoretical analysis and numerica l simulations\, the optimal parameters of the gold grating with liquid wat er solutions under test were found. The sensitivity of the grating sensor has been estimated. This work is partially supported by RFBR grant №16-3 2-00678 мол_а.\n\nhttps://indico.inp.nsk.su/event/24/contributions/103 1/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1031/ END:VEVENT BEGIN:VEVENT SUMMARY:Simulation and Experimental Study of Beam Dynamics in NovoFEL RF G un and its Beamline DTSTART;VALUE=DATE-TIME:20200713T130300Z DTEND;VALUE=DATE-TIME:20200713T130400Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1033@indico.inp.nsk.su DESCRIPTION:Speakers: Anton Matveev (BINP SB RAS)\nA new normal-conducting \, CW\, thermocathode RF gun was developed and tested at Budker Institute of Nuclear Physics recently. Providing average current up to 100 mA\, this device will be used to upgrade the injector of Novosibirsk FEL facility. A beam dynamics simulation in RF gun and its beamline was made with space- charge forces being taken into account. Comparison of the simulation resul ts and experimental measurements is presented in this paper.\nResults of r esearches supported by RBRF grant 15-02-07776 were used in this work.\n\nh ttps://indico.inp.nsk.su/event/24/contributions/1033/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1033/ END:VEVENT BEGIN:VEVENT SUMMARY:Monitoring system of Novosibirsk FEL optical channel state using 1 -Wire devices DTSTART;VALUE=DATE-TIME:20200713T130400Z DTEND;VALUE=DATE-TIME:20200713T130500Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1034@indico.inp.nsk.su DESCRIPTION:Speakers: Sergey Tararyshkin (Budker Institute of Nuclear Phys ics)\nMonitoring system of Novosibirsk FEL optical channel state using 1-W ire devices is described\n\nhttps://indico.inp.nsk.su/event/24/contributio ns/1034/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1034/ END:VEVENT BEGIN:VEVENT SUMMARY:Usage of Epics Channel Access protocol in Novosibirsk FEL control system DTSTART;VALUE=DATE-TIME:20200713T130500Z DTEND;VALUE=DATE-TIME:20200713T130600Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1037@indico.inp.nsk.su DESCRIPTION:Speakers: Stanislav Serednyakov (Budker Institute Of Nuclear P hysics)\nExamples of Usage of Epics Channel Access protocol and High level Applications in Novosibirsk FEL control system are described\n\nhttps://i ndico.inp.nsk.su/event/24/contributions/1037/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1037/ END:VEVENT BEGIN:VEVENT SUMMARY:Characteristic of d-f states in DyNi2Mn and ErCo2Mn compounds wit h strong electronic correlations by resonant photoemission DTSTART;VALUE=DATE-TIME:20200713T141300Z DTEND;VALUE=DATE-TIME:20200713T141400Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1846@indico.inp.nsk.su DESCRIPTION:Speakers: Ekaterina Ponomareva (M.N. Miheev Institute of Metal Physics UB RAS)\nInvestigation of intermetallic compounds have been incre asingly attractive due to their structural and magnetic properties and the possibility of developing new functional materials based on them. The com pounds RT2Mn (R = Dy\, Er\; T = Ni\, Co) crystallize in cubic MgCu2 – ty pe structure by alloying 3d transition metal (T) and rare-earth (R). Certa in amount of manganese is introduced in compounds of this type led to a ch ange in the characteristics of materials [1]. \nThe interplay of d-and f-e lements and its effect on the formation of the electronic structure in suc h compounds as DyNi2Mn and ErCo2Mn are studied. The method used resonant x -ray photoemission spectroscopy allows to select the contributions of the various components in the valence bands (VB). We can study not only the gr ound state\, but also the lifetime of the excited (a core-level hole – V B electron) state\, determine energies of the VB single-particle states an d two-hole states at selected atoms\, see reactions to sudden appearance o f the core-level photo-hole. Resonant photoemission in narrow-band materia ls is described by the sum of first- and second order transitions\, their quantum-mechanical interference leads to an increase in the spectrum from the valence bands and the appearance of an asymmetric dependence on the ph oton energy. Recently\, these effects were studied theoretically and exper imentally using the example of three-component intermetallic compounds TbN i2Mnx [2]. The competition between the elastic and inelastic photoemission channels leads to a different dependence of photoemission spectra from ni ckel and manganese on photon energy. The elastic channel is realized on at oms with large magnetic moments\, the inelastic Auger decay occurs on atom s with small moments.\nThe research was supported by RFBR project № 20-0 2-00541.\n\nhttps://indico.inp.nsk.su/event/24/contributions/1846/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1846/ END:VEVENT BEGIN:VEVENT SUMMARY:Direct writing on PbWO4 monocrystalline using X-rays DTSTART;VALUE=DATE-TIME:20200713T133200Z DTEND;VALUE=DATE-TIME:20200713T133300Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1044@indico.inp.nsk.su DESCRIPTION:Speakers: Vladimir Nazmov (BUdker Institute of Nuclear Physics )\nThe lithographic profile on the material surface is usually based on ma king structural changes in the intermediate - technological layer using ra diation\, and the subsequent transfer of the resulting topology to the und erlying layer of the functional material. However\, not all materials enab le the removal process that meets the sufficient selectivity value. This r eport presents the results of direct writing a relief on an inorganic PbWO 4 crystal using synchrotron radiation in the X-ray range. This work is par tially supported by RFBR grant № 19-42-540014.\n\nhttps://indico.inp.nsk .su/event/24/contributions/1044/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1044/ END:VEVENT BEGIN:VEVENT SUMMARY:High-P\,T diffraction studies of dehydration of magnesium silicate s related to the deep Earth’s water cycle DTSTART;VALUE=DATE-TIME:20200714T105000Z DTEND;VALUE=DATE-TIME:20200714T111000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1043@indico.inp.nsk.su DESCRIPTION:Speakers: Anna Likhacheva (Sobolev Institute of Geology and Mi neralogy SibD RAS)\nIn the context of the global H2O cycle\, an active int erest is taken in water recycling associated with subduction of oceanic pl ates into the mantle. Mineral serpentine\, Mg3Si2O5(OH)4\, is regarded as the main water reservoir in oceanic litosphere [1]\, and therefore its deh ydration can produce a large impact onto seismic activity and magma genera tion in subduction zones. Since the dehydration temperature can be effecti vely decreased in the presence of alkali chlorides [2]\, we explore this e ffect on serpentine dehydration. Here we report the results of in-situ X-r ay diffraction and Raman spectroscopy studies of two serpentine minerals\, chrysotile and antigorite\, in the presence of sodium chloride at high P- T conditions relevant to subduction zone (1-4 GPa\, 400-800oC). The dehydr ation temperature of both minerals is about 200 degrees lower compared to salt-free H2O-saturated conditions\, which is important for the localizati on of dehydration reactions in subducting slab. This work is supported by the Russian Foundation for Basic Research (grant No 18-05-00312). Diffract ion experiments were performed at SSTRC\, Novosibirsk (project RFMEFI62119 X0022) and the PETRA III (DESY\, Hamburg)\, and supported by approval of P ETRA III Proposal I-20190140.\n\nhttps://indico.inp.nsk.su/event/24/contri butions/1043/ LOCATION: Zoom 890 9721 5207 URL:https://indico.inp.nsk.su/event/24/contributions/1043/ END:VEVENT BEGIN:VEVENT SUMMARY:Magnetic Field Effect on the Free Induction Decay of Hydroxyl Radi cal (OH) in the Terahertz Region DTSTART;VALUE=DATE-TIME:20200714T110000Z DTEND;VALUE=DATE-TIME:20200714T112000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1793@indico.inp.nsk.su DESCRIPTION:Speakers: Evgeniy Chesnokov (Istitute of Chemical Kinetics)\nA bstract\n\nEffect of external longitudinal magnetic field on the optical F ree Induction Decay from a free radical is observed for the first time. Th e experiments were performed on a rotational transition of hydroxyl radica l\, OH (23/2(J=1)  23/2(J=0) at 83.8 cm−1) using Terahertz Free Electron Laser. In contrast to the results of the experiments with a stab le paramagnetic molecule\, NO\, the observed effect of external magnetic f ield on the Free Induction Decay from hydroxyl radicals is more complicate d. Longitudinal magnetic field leads to the rotation of the polarization p lane of the FID radiation as well as to an additional modulation of the si gnal intensity. The angle of the rotation of the plane of polarization is large\, in agreement with the theoretical predictions. The observed FID ki netics in the time domain are in semi-quantitative agreement with the mode ling. This observation opens an opportunity of selective detection of weak signals of short-lived reactive paramagnetic free radicals from overwhelm ing signals that originate from stable non-paramagnetic species by polariz ation discrimination. This work is partially supported by RFBR grant №15 -03-05352.\n\nhttps://indico.inp.nsk.su/event/24/contributions/1793/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1793/ END:VEVENT BEGIN:VEVENT SUMMARY:A development of compact combined pump for SRF SKIF DTSTART;VALUE=DATE-TIME:20200713T131100Z DTEND;VALUE=DATE-TIME:20200713T131200Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1777@indico.inp.nsk.su DESCRIPTION:Speakers: Alexey Semenov (BINP SB RAS)\nIt is required an ultr a-high vacuum (near 10-11 Torr in the beam absence mode) in the synchrotro n source of 4+ generation SFR “SKIF”. Owing to the vacuum chambers hav e small molecular conductivity and it exists the space limitation for pump s location\, compact combined pumps application is required\, i.e. pump on the base of non-evaporable getter and sputter ion pump. The modern pumps NEXTorr (SAES Getters\, Italy) are not implemented the all of requirements on the inert gases such as argon and methane for SFR “SKIF”. Therefor e\, it is necessary to create similar combined pumps by Russian manufactur e.\nThe first pumping speed calculations for one cell of triode type sputt er ion pump and the whole of pump are presented here. Also experimental re sults of pumping speed measurements depending on the magnetic field\, diam eter and length of cell for sputter ion pump are given.\n\nhttps://indico. inp.nsk.su/event/24/contributions/1777/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1777/ END:VEVENT BEGIN:VEVENT SUMMARY:The project "Diagnostics in the high-energy X-ray range" beamline at the Siberian synchrotron SKIF DTSTART;VALUE=DATE-TIME:20200713T134800Z DTEND;VALUE=DATE-TIME:20200713T134900Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1780@indico.inp.nsk.su DESCRIPTION:Speakers: Konstantin Kuper (BINP)\nThe project of the beamline “Diagnostics in the high-energy X-ray range” will become the basis fo r advanced scientific experiments in the materials science\, geophysics\, archaeologists\, paleontology\, byology and medicine. A number of research techniques will be implemented at the station using high-resolution intro scopy\, diffraction\, and X-ray scattering.\n\nhttps://indico.inp.nsk.su/e vent/24/contributions/1780/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1780/ END:VEVENT BEGIN:VEVENT SUMMARY:COMPRESSION AND HIGH-PRESSURE TORSION TECHNIQUES FOR DIFFRACTOMETR Y IN SYNCHROTRON RADIATION AND NGR-SPECTROSCOPY DTSTART;VALUE=DATE-TIME:20200713T133500Z DTEND;VALUE=DATE-TIME:20200713T133600Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1784@indico.inp.nsk.su DESCRIPTION:Speakers: Alexander Patselov (M.N. Miheev Institute of Metal P hysics of Ural Branch of Russian Academy of Sciences)\, Eugeny Chernyshev (M.N. Mikheev Institute of Metal Physics\, UB of the RAS\, Ekaterinburg\, Russia)\nTo implement a soft stress state scheme used to obtain high quasi -hydrostatic pressure and large plastic deformations\, Bridgman type stati c anvils and anvils with mutual axial rotation - shear under pressure - ar e most suitable. The last technique has been given the name high pressure torsion (HPT). This method is widely used to study the features of phase t ransitions under pressure and also to obtain and study bulk nanocrystallin e materials. Depending on the task\, anvil punches are used with different bandwidths of x-rays and gamma rays. To study the kinetics\, degree\, and hysteresis of baric phase transformations\, superhard materials with a re latively high permeability of gamma and X-rays are used: cubic boron nitri de (c-NB)\, synthetic sapphire\, and also the skeleton - artificial finely dispersed diamond with SiC binder. A vacuum pumping or an inert gas mediu m is used to create a chemical inert medium. To produce nanocrystalline st ructures of metals and alloys\, the anvil punches made of tungsten carbide with a cobalt binder are mainly used: WC-6. \n To solve a number of spect roscopy tasks under conditions of high static compression and deformation of materials\, a set of HPT methods was created on the basis of hydraulic presses with an effort of 106 and 5 * 10^6 N and also portable cameras for studying *in situ* phase transitions. Operating ranges of varied paramete rs: pressure 1.0 - 18 GPa\, temperature 20 - 800 K\, true logarithmic defo rmation up to (e ≤ 7). A device for measuring the moment of the resistan ce force of samples to deformation by torsion was created with conversion to the resistance to torsion. The device is based on a strain gauge and an electronic dynamometer with data transfer and recording to a computer. To avoid the influence of low and high temperatures\, the strain gauge is mo ved away from the anvil block on the lever 0.52 m from the axis of rotatio n of the anvils.\n The portable chamber for compression and HPT with anvil s made of cubic boron nitride is made of stainless steel. The supporting p arts for the c-NB anvils are made of WC -6\, the rotating anvil is support ed by a thrust bearing. The camera is used *in situ* for two methods: Mös sbauer spectroscopy with E = 14.4 eV and also for X-ray diffractometry\, m ainly on synchrotron radiation (SI) λ = 3685 nm at the SR beamline №4 o f the VEPP-3 storage ring of BINP SB RAS. In the portable chamber\, the fe atures and hysteresis of the baric phase bcc-hcp direct and reverse transi tion both in single-crystal and nanocrystalline samples of pure iron were studied. The exposure time of the spectra using the SI and Mössbauer spec troscopy methods was 1 hour and 60 hours\, respectively. \n The experiment s of the samples produced by mechanical alloying by HPT of non-soluble ele mental powder mixtures of Fe-Cu\, Ag-Cu\, Au-Co were carried out. It is fo und that non-equilibrium nanostructured solid solutions were obtained in a ll concentrations of powder mixtures.\nThe research was carried out within the state assignment of Ministry of Science and Higher Education of the R ussian Federation (theme Рressure No. АААА-А18-118020190104-3)\, sup ported in part by RFBR (project No. 19-32-60039).\n\nhttps://indico.inp.ns k.su/event/24/contributions/1784/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1784/ END:VEVENT BEGIN:VEVENT SUMMARY:Research of nanoscale systems of complex composition by XAFS metho d at the EXAFS spectroscopy station of SSTRC DTSTART;VALUE=DATE-TIME:20200715T070000Z DTEND;VALUE=DATE-TIME:20200715T072000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1782@indico.inp.nsk.su DESCRIPTION:Speakers: Vladimir Kriventsov ()\nThis work shows the results of the study of trial test samples of technological and natural origin\, a nd using a complex composition for the development of combined methods bas ed on synchrotron radiation (SR)\, such as μ-XANES/EXAFS\, μ-XRF\, and o thers. Main goal of the study is to adapt the developed integrated approac h for the study of micro-inclusions and microparticles by SR methods in th e near future. All the spectra of the studied samples were recorded using standard methods\, both at the experimental module of x-ray confocal micro scopy located at NRC “Kurchatov Institute” (Moscow) and at XRF-\, EXAF S- stations of Siberian Synchrotron Terahertz Radiation Center (SSTRC\, No vosibirsk).\nThe studied test samples with a complex composition (such as low-percentage metal oxide nanocomposites\, nanoalloys\, and samples of na tural origin) were synthesized and/or selected from existing collections. Test samples and benchmarks necessary for testing and developing SR techni ques were studied by a set of methods (μ-XANES/EXAFS\, μ-XRF\, XAFS\, XR F\, HRTEM\, XPS\, SEM\, EDX\, etc.). New information about phase and eleme nt compositions\, atomic structure\, morphology\, and structural parameter s was obtained for the test systems under study. The data obtained by all the methods are in a good agreement. The possibilities of the proposed app roach for the study of microparticles and micro-inclusions of complex comp osition by methods implemented using synchrotron radiation are demonstrate d.\nThe work was carried out in the framework of the RFBR projects no. 19- 05-50046\, 18-03-01251. The work was done at the shared research center SS TRC on the basis of the Novosibirsk FEL/VEPP-4-VEPP-2000 complex at BINP S B RAS\, using equipment supported by project RFMEFI62119X0022.\n\nhttps:// indico.inp.nsk.su/event/24/contributions/1782/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1782/ END:VEVENT BEGIN:VEVENT SUMMARY:AN EXAMPLE OF USING THE OPTICAL CHARACTERISTICS OF METALS OBTAINED BY THE METHODS OF SYNCHRO-TRON RADIATION AND ELLIPSOMETRY TO DETERMINE TH E ELECTRONIC PROPERTIES OF ALUMINUM IN A SOLID STATE DTSTART;VALUE=DATE-TIME:20200713T130100Z DTEND;VALUE=DATE-TIME:20200713T130200Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1020@indico.inp.nsk.su DESCRIPTION:Speakers: Anatoly Kiselev (Federal State government-financed r esearch institution Institute of Solid State Chemistry of the Ural Branch of the Russian Academy of Sciences)\nThe technique for establishing the o ptical characteristics of metal-lic systems from synchrotron reflection sp ectra allows one to establish characteristics for the required range of lo w energy values. It is pro-posed to use the procedure for evaluating the e lectronic properties of aluminum by experimentally investigating the spect rum of optical conductivity with subsequent calculation of the Kramers-Kro nig inte-gral relations and the analytical between optical functions. For com-parison\, the results of processing the spectrum of the optical conduc -tivity of an ellipsometric experiment are presented for a range of en-erg y values from 0.5 to 3 eV. A feature of the approach for determin-ing the electronic characteristics of metal systems by minimizing the deviation of the model optical conductivity curve from the experi-mental one is the va riation in the effective mass of the electrons. When using ellipsometry da ta\, the determined electronic characteris-tics change quite sequentially with a change in the effective mass val-ue. The use of data obtained from synchrotron spectra shows the presence of significant local jumps in the m easured values at certain effective masses. Perhaps this is determined by the imperfection in the numerical approaches of interpreting the data of t he synchrotron ex-periment. When modeling optical conductivity\, we can su mmarize the contributions from interband conductivity under the influence of pho-ton energy. In the case of permittivity\, cross-contributions shoul d also be considered. \nThe research was carried out within the state as signment of FASO of Russia (theme № АААА-А19-119031890028-0)\n\nhtt ps://indico.inp.nsk.su/event/24/contributions/1020/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1020/ END:VEVENT BEGIN:VEVENT SUMMARY:FT-IR investigation of netlike polymerization of SU-8 resist layer s during photo- and X-ray lithography processes DTSTART;VALUE=DATE-TIME:20200713T133600Z DTEND;VALUE=DATE-TIME:20200713T133700Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1788@indico.inp.nsk.su DESCRIPTION:Speakers: Elena Reznikova ()\nLayers of multi-component SU-8 r esist\, which includes a diglycidyl ether of bisphenol A novolac as a mono mer\, were investigated by the FT-IR spectroscopic method for a wave numbe r range of 600 - 5000 cm-1 after each step of the photo and X-ray lithogra phy processes (coating\, pre-exposure baking\, exposure\, post-exposure ba king\, development). The doses of absorbed both photo and X-ray radiation were varied from 0.1 to 6000 J/cm3 with uniform dose distribution in the l ayer depth. It was found that the monomers are bonded to each other in ini tial pre-polymer by means of the end disrupted epoxy groups. The band inte nsity at the 914 cm-1 wave number is decreased after heating of exposed SU -8 layer with an increase of a dose of absorbed radiation because of a dis ruption of the glycidyl groups. The disrupted bonds of the pre-polymer mol ecules connect to each other with a net polymer formation\, and the intens ities of FT-IR spectral bands at 1076\, 1110\, 1128 and 1150 cm-1 are enha nced. In contrast to photolithography\, an X-ray exposure results to a dis ruption of the epoxy groups of the pre-polymer molecules as well as a form ation of polymer ester bonds -C-O-C- during both the exposure process and post-exposure baking. The relative quantity of disrupted epoxy groups and the correspondent amount of a new formed polymer bonds in the resist layer are grown with an increase of the dose of the absorbed radiation up to sa turation at about 1000 J/cm3. The dose dependence of a relative number of monomers in the insoluble phase of the residual polymer area after the dev elopment process corresponds to the characteristic curve of a relative res idual thickness of the resist layer. The dose of about 1 J/cm3 is a thresh old for an appearance of the insoluble phase of the layer on a substrate s urface. At approximately 30-60 J/cm3 the shrinkage and swelling of the lay er with the insoluble phase becomes close to zero. The mass ratios of the insoluble and soluble phases in the resist layer in dependence on the dose of absorbed X-ray radiation were determined\, the quantity of absorbed ph otons and the track lengths of photo- and Auger-electrons were calculated in order to model the SU-8 netlike polymerization. The physical-chemical p roperties of SU-8 polymer\, the mechanism and optimization of X-ray lithog raphy processes using synchrotron radiation are discussed.\nThis work is p artially supported by grant №19-42-540014 of Russian Foundation for Basi c Research and Government of Novosibirsk Region.\n\nhttps://indico.inp.nsk .su/event/24/contributions/1788/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1788/ END:VEVENT BEGIN:VEVENT SUMMARY:Synchrotron radiation application in the BINP DTSTART;VALUE=DATE-TIME:20200713T071000Z DTEND;VALUE=DATE-TIME:20200713T074000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1819@indico.inp.nsk.su DESCRIPTION:Speakers: Konstantin Zolotarev (Budker Institute of Nuclear Ph ysics)\nThe Siberian Siberian Synchrotron and Terahertz Radiation Center i s the oldest Russian center for synchrotron radiation applications. The ce nter combines the research efforts of numerous scientific groups\, mostly from institutes of the Novosibirsk Scientific Center\, as well as groups f rom institutes and universities of other Russian cities. The center provid es research groups with access to most popular synchrotron radiation appli cations and research techniques. A big part of the activity is devoted to developing new original approaches for synchrotron radiation usage. \nThe report covers activity on synchrotron radiation applications at the Siberi an Synchrotron and Terahertz Radiation Center\, as well as some bright res ults of recent research.\n\nhttps://indico.inp.nsk.su/event/24/contributio ns/1819/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1819/ END:VEVENT BEGIN:VEVENT SUMMARY:Construction of a biosensor sensitive to terahertz radiation based on the glutamine synthase gene promoter DTSTART;VALUE=DATE-TIME:20200714T090000Z DTEND;VALUE=DATE-TIME:20200714T093000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1787@indico.inp.nsk.su DESCRIPTION:Speakers: Sergey Peltek (Institute of Cytology and Genetics SB RAS (Novosibirsk\, Russia))\nIn this study we performed a differential pr oteomic analysis of the total E.coli soluble protein fraction after exposu re to THz radiation. Glutamine synthase was one of the proteins overexpres sed in response to THz radiation. We constructed the E.coli/pGlnA-GFP bios ensor based on the promoter of the glnA gene and the GFP protein and demon strated that it could detect THz radiation.\n\nhttps://indico.inp.nsk.su/e vent/24/contributions/1787/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1787/ END:VEVENT BEGIN:VEVENT SUMMARY:Optical design of the «Structural Diagnostics» beamline for SRF «SKIF» DTSTART;VALUE=DATE-TIME:20200713T130200Z DTEND;VALUE=DATE-TIME:20200713T130300Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1030@indico.inp.nsk.su DESCRIPTION:Speakers: Zakhar Vinokurov (BIC SB RAS)\nHerewith\, we present the optical design of the «Structural Diagnostics» beamline developed f or a fourth generation synchrotron radiation (SR) source SRF “SKIF”. T he multi section beamline is based on a superconducting undulator (see tab le below) and will have a total of 4 experimental instruments\, three will use fixed energy side branches and the fourth one located on the straight section will have the option of wide energy spectrum. A variety of diffra ction experiments can be accomplished simultaneously at this beamline than ks to such a design. The four aforementioned sections are: High-resolution powder diffraction (straight section 1-2-1)\; In situ diffraction (side s ection 1-2-2)\; Single-crystal X-ray diffraction (side section 1-2-3)\; Sm all angle X-ray scattering (side section 1-2-4). \n \n![Scheme. Optical train of the High-resolution powder diffraction (straight section 1-2-1). \nCalculated spot size at each one of the experimental sections as well as expected fluxes will be presented. Heat management for optical compone nts will be also discussed. \n][1] \n \nTable. Main machine parameter s \n \nEnergy [GeV] - 3 \n \nCircumference [m] -476 \n \nHF [MHz] - 178.47 \n \nHorizontal emittance [pm.rad] - 75 \n \nCoupling cons tant [%] - 10 \n \nBeam current [mA] - 400 \n \nNo. of bunches - 510 \n \nβx\, βy [m] - 13\, 1.9 \n \nTable. Main undulator parameters \n \nPeak field B0 [T] 1.25 \n \nPeriod length λU [mm] 15.6 \n \nMinimum magnetic gap [mm] 8 \n \nMagnetic Length L [mm] ~1997 \n \ nTotal power Ptot (B=1.25 T\, I=0.4 A\, E=3 GeV) [kW] 7.18 \n \nOn-axis power density (B=1.25 T\, I=0.4 A\, E=3 GeV) [kW/mrad2] 50 \n \nAcknow ledgements \nThe work was supported by Ministry of Science and Higher Ed ucation of the Russian Federation (grant No. АААА-А19-119020890025-3) . \n \n \n[1]: https://drive.google.com/open?id=1BoL_jAur8e0l4pLDLUpZP _yfpqwrtML-\n\nhttps://indico.inp.nsk.su/event/24/contributions/1030/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1030/ END:VEVENT BEGIN:VEVENT SUMMARY:Magnetic measurements in small aperture of indirect cooling wiggle r. DTSTART;VALUE=DATE-TIME:20200713T131300Z DTEND;VALUE=DATE-TIME:20200713T131400Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1794@indico.inp.nsk.su DESCRIPTION:Speakers: Sergey Khrushchev (BINP)\nSeveral last superconducti ng wigglers fabricated in Budker INP are of indirect cooling. They all hav e small aperture with cryogenic temperature. This feature makes measuremen ts enough complicated task. Magnetic measurement system designed especiall y for one of such wigglers are described in this article. The results of m agnetic measurements both by Hall probe and by stretched wire method are a lso presented.\n\nhttps://indico.inp.nsk.su/event/24/contributions/1794/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1794/ END:VEVENT BEGIN:VEVENT SUMMARY:Superconducting 3 Tesla 54-pole indirect cooling wigglers with a p eriod of 48 mm for Kurchatov Synchrotron Radiation Source DTSTART;VALUE=DATE-TIME:20200713T111000Z DTEND;VALUE=DATE-TIME:20200713T113000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1810@indico.inp.nsk.su DESCRIPTION:Speakers: Vitaliy Shkaruba (BINP)\nTwo identical 54-pole indir ect cooling wigglers with a 3 Tesla magnetic field and a period of 48 mm w ere designed and manufactured by ВINP SB RAS as the insertion devices for X-rays generation on the Kurchatov Synchrotron Radiation Source. After b eing delivered to the Kurchatov Institute these wigglers were tested in 20 19 with a full test cycle to demonstrate operating parameters and installe d on the storage ring for commissioning with electron beam. The main fea tures of magnetic and cryogenic system design and tests results of these s uperconducting insertion devices capable of autonomous operation for a lon g time on the storage ring without maintenance and consumption of liquid h elium are presented.\n\nhttps://indico.inp.nsk.su/event/24/contributions/1 810/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1810/ END:VEVENT BEGIN:VEVENT SUMMARY:Features of using of the hard X-rays ( 60 – 120 keV ) of synchro tron radiation for determination the trace concentrations of rare-earth an d heavy elements by the SRXFA method DTSTART;VALUE=DATE-TIME:20200715T113000Z DTEND;VALUE=DATE-TIME:20200715T115000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1798@indico.inp.nsk.su DESCRIPTION:Speakers: Aleksandr Legkodymov ()\nThe analysis of the element al composition of samples by their X-ray fluorescence spectra were perform ed at the synchrotron radiation station using radiation from the 9-pole wi ggler on VEPP-4M at the Siberian Center for Synchrotron and Terahertz Radi ation (SSTRC).\nThe excitation energy for the determination of rare-earth elements (La-Lu) and heavy platinoids (Os\,Ir\,Pt) and also Au was 60 - 12 0 keV. The Compton and the multiple scattering of radiation from samples w as analysed. The samples Russian and International standarts were used.\nT he work was done using the infrastructure of the Shared-Use Center "Siberi an Synchrotron and Terahertz Radiation Center (SSTRC)" based on VEPP-4M of BINP SB RAS (Novosibirsk\, Russian Federation\, using equipment supported by project RFMEFI62119X0022. This work is partially supported by RFBR gra nt 17-45-540618.\n\nhttps://indico.inp.nsk.su/event/24/contributions/1798/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1798/ END:VEVENT BEGIN:VEVENT SUMMARY:Evaluation of CCD detector absolute responsivity with the aid of s ynchrotron radiation DTSTART;VALUE=DATE-TIME:20200715T102000Z DTEND;VALUE=DATE-TIME:20200715T104000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1797@indico.inp.nsk.su DESCRIPTION:Speakers: Eugene Vishnyakov (P.N.Lebedev Physical Institute of RAS)\nWe have employed VEPP-4 synchrotron radiation to measure CCD detect or absolute responsivity in vacuum ultraviolet (115-310 nm) spectral rang e. The detector is designed in the form of a stainless steel enclosure con taining a backside-illuminated CCD to protect the CCD from contamination. The entrance window of the enclosure is a round MgF2 spectral filter trans parent for ultraviolet radiation with wavelengths longer than 112 nm. The measurements were carried out at Kosmos Metrological Station at the opera ting temperature of -100°C on the sensitive surface of the CCD. We utiliz ed SPD calibrated silicon photodiode with 1 cm2 sensitive area and a know n spectral sensitivity profile as a reference detector. The resultant meas urements show a clear CCD responsivity dip near 280 nm\, and a great pote ntial to improve the CCD responsivity values using specially designed anti -reflection coatings.\n\nhttps://indico.inp.nsk.su/event/24/contributions/ 1797/ LOCATION: Zoom 890 9721 5207 URL:https://indico.inp.nsk.su/event/24/contributions/1797/ END:VEVENT BEGIN:VEVENT SUMMARY:Diamond micro-CRL for coherent X-ray imaging and microscopy DTSTART;VALUE=DATE-TIME:20200713T134300Z DTEND;VALUE=DATE-TIME:20200713T134400Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1877@indico.inp.nsk.su DESCRIPTION:Speakers: Polina Medvedskaya (Immanuel Kant Baltic Federal Un iversity)\nWe demonstrate the capabilities of ion-beam lithography (IBL) f or the manufacturing of the X-ray refractive micro-optics. With the help o f IBL\, the hardest of current materials – diamond – was milled\, and micro scale diamond lenses were produced. Lenses have a rotationally parab olic profile with radii of parabola apexes less than 5 μm. As has been co nfirmed with SEM and AFM\, shape profile errors of fabricated lenses were \n\nhttps://indico.inp.nsk.su/event/24/contributions/1877/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1877/ END:VEVENT BEGIN:VEVENT SUMMARY:What does the macromolecular crystallography users community expec t from the modern synchrotron source? DTSTART;VALUE=DATE-TIME:20200715T114000Z DTEND;VALUE=DATE-TIME:20200715T114100Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1826@indico.inp.nsk.su DESCRIPTION:Speakers: Sergey Arkhipov (Novosibirsk State University)\nВ докладе будут рассмотрены основные потр ебности пользователей синхротронного и злучения\, задачей которых является рент геноструктурный анализ монокристаллов биополимеров (белков\, нуклеиновых кисло т и их комплексов) и дальнейшая расшифро вка структуры\, необходимая для решения изначально поставленной биологической задачи. Для сбора информации автор консу льтировался с исследователями\, регуляр но проводящими эксперименты на станциях различных синхротронов (ESRF\, DESY\, SSRF\, Spring- 8\, MAX IV)\, изучал тематическую литературу и информацию представленную в базе данн ых кристаллических структур биополимер ов (PDB\, protein data bank). Будут затронуты техник и сбора данных и доставки кристаллов для метода "серийной синхротронной кристал лографии" (SSX) и требуемое для этого обору дование\, подходы к уменьшения радиацион ного разрушения образца\, значение крист аллизационных комнат в непосредственно й близости от синхротрона\, методы транс портировки кристаллов на экспериментал ьную станцию\, подходы к сбору данных без извлечения кристаллов из кристаллизаци онного резервуара.\n\nhttps://indico.inp.nsk.su/event/24/c ontributions/1826/ LOCATION: Zoom 890 9721 5207 URL:https://indico.inp.nsk.su/event/24/contributions/1826/ END:VEVENT BEGIN:VEVENT SUMMARY:Conception of vacuum system for SRS «SKIF» DTSTART;VALUE=DATE-TIME:20200713T132200Z DTEND;VALUE=DATE-TIME:20200713T132300Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1879@indico.inp.nsk.su DESCRIPTION:Speakers: Alexander Krasnov (Budker INP SB RAS)\nRequirement f or deep molecular rarefaction inside low aperture beam pipe in presence of high intensity Synchrotron Radiation together with very tight magneto-opt ical system makes performance of vacuum system for modern high brightness Synchrotron Radiation Sources (SRS) quite challenging. To avoid emittance blow-up its beam pipe must be as smooth as possible along beam propagation . It relates to all components like flange connections\, pumping ports and compensators also. In addition\, the vacuum system must be stable over ye ars against inevitable micro-leaks and suitable for possible modifications of other systems\, which require its air venting. The paper presents a co nception of the SRS SKIF vacuum system fitting the set of requirements. A simplified model for estimation and optimization of a scenario for the vac uum system conditioning is also described.\n\nhttps://indico.inp.nsk.su/ev ent/24/contributions/1879/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1879/ END:VEVENT BEGIN:VEVENT SUMMARY:First experiments on new synchrotron radiation technological stati on on the VEPP-4M DTSTART;VALUE=DATE-TIME:20200713T133700Z DTEND;VALUE=DATE-TIME:20200713T133800Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1806@indico.inp.nsk.su DESCRIPTION:Speakers: Boris Goldenberg (Budker INP)\nA new synchrotron rad iation technological station at beamline #1 from the VEPP-4M storage ring was constructed and experimental work started. The station is intend for p ractical training of students to carryout experiments on synchrotron radia tion. The modular concept of construction of station allows us to put stat ion in to operation in stages\, also it allows us to realize various resea rch methods. The article presents the design of the station\, SR beam char acteristics and test experiments on X-ray fluorescence analysis. This work is partially supported by RFBR grant № 19-05-50046. The work was done a t the shared research center SSTRC on the basis of the VEPP-4 - VEPP-2000 complex at BINP SB RAS\, using equipment supported by project RFMEFI62119X 0022.\n\nhttps://indico.inp.nsk.su/event/24/contributions/1806/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1806/ END:VEVENT BEGIN:VEVENT SUMMARY:Development of silicon microstrip detector with integrating readou t for time-resolved studies in microsecond scale. DTSTART;VALUE=DATE-TIME:20200713T142900Z DTEND;VALUE=DATE-TIME:20200713T143000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1839@indico.inp.nsk.su DESCRIPTION:Speakers: Lev Shekhtman ()\nFirst results from the tests of a new full-size prototype of a silicon microstrip detector with integrating readout for studies of material deformations under pulsed heat load are pr esented. The prototype includes the silicon microstrip sensor with 1024 30 mm long strips with 50 um pitch\, half of which are connected to the inpu ts of analogue pipeline ASICs APC128. The readout electronics can integrat e charge released in the sensor under synchrotron radiation within exposur e time from 100 ns to tens microseconds. Spatial resolution measured at an energy of X-rays about 70 keV is close to 100 um (FWHM). Next steps of th is development including the change of sensor material to GaAs and usage o f the new ASIC DMXG64B for the readout electronics are discussed.\n\nhttps ://indico.inp.nsk.su/event/24/contributions/1839/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1839/ END:VEVENT BEGIN:VEVENT SUMMARY:Beam-beam compensation in a collider based on energy recovery lina c and storage ring DTSTART;VALUE=DATE-TIME:20200713T131200Z DTEND;VALUE=DATE-TIME:20200713T131300Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1792@indico.inp.nsk.su DESCRIPTION:Speakers: Shamil Lachynov (Novosibirsk State University\, Budk er Institute of Nuclear Physics)\nOne of the aims of new circular collider projects is further increasing in their luminosity. The high space charge electromagnetic field at the meeting points limits the achievable current densities and consequently the luminosity. Non-linear focusing compensati on in a storage ring done by the opposite-charge beam circulating in anoth er storage ring was proposed and tested many years ago. Ya. S. Derbenev ha s shown that such a scheme suffers from tune shifts of coherent betatron o scillations\, which move betatron frequencies toward the nearest integer o r half-integer resonance. \nIn this paper\, the collider based on electron energy recovery linac (ERL) and “figure-8” positron storage ring wit h beams of equal currents is considered. Positrons are circulating in a tw o-loop storage ring (positron-positron collider)\, and electron-electron c ollider uses ERL\, as in original Tigner’s proposal. Thus\, a collision of four bunches and space-charge compensation in a multi-bunch mode can b e ensured. The mathematical and numerical analysis of this configuration i s presented.\nResults of researches supported by RBRF grant 15-02-07776 we re used in this work.\n\nhttps://indico.inp.nsk.su/event/24/contributions/ 1792/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1792/ END:VEVENT BEGIN:VEVENT SUMMARY:Status of the development of the silicon microstrip detector for u ltra-fast dynamic studies DTSTART;VALUE=DATE-TIME:20200713T133800Z DTEND;VALUE=DATE-TIME:20200713T133900Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1809@indico.inp.nsk.su DESCRIPTION:Speakers: Lev Shekhtman ()\nNew silicon microstrip detector fo r ultra-fast dynamic studies is being developed in the Institute of Nuclea r Physics SB RAS. The first prototype of such detector with a silicon sens or with 50 um strip pitch\, 30 mm strip length and with 96 active channels equiped with specially developed ASIC is now operating at the SR beam lin e 8 of the VEPP-4M storage ring. The new prototype demonstrated about 20 t imes higher limit of the detected photon flux that the detector can measur e as compared to the current detector DIMEX-G\, based on gas technology. S patial resolution of the new prototype is ~4 times better and frame rate i s about 6 times higher than in the gaseous detector. The first results of operation in multi-bunch mode with VEPP-4M storage ring will be demonstrat ed in the presentation.\n\nThis work is supported by RFBR grant number 19- 42-540006.\n\nhttps://indico.inp.nsk.su/event/24/contributions/1809/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1809/ END:VEVENT BEGIN:VEVENT SUMMARY:Beamline instrumentation at SKIF by JJ X-Ray DTSTART;VALUE=DATE-TIME:20200715T112000Z DTEND;VALUE=DATE-TIME:20200715T114000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1808@indico.inp.nsk.su DESCRIPTION:Speakers: Paw Kristiansen (JJ X-ray)\nA short introduction to JJ X-Ray and the potential collaboration for beamline instrumentation with SKIF. \nJJ-X Ray is a Danish company situated at DTU Science Park near Co penhagen. JJ X-ray specializes in developing\, designing and producing adv anced components and assemblies for x-ray\, synchrotron radiation\, FEL an d neutron instrumentation. In particular\, JJ X-Ray is scientifically invo lved in instrument developments at various large-scale synchrotron\, X-FEL and neutron facilities worldwide\, with strong emphasis on the research a mbitions for the instruments. Among the more standard competences are slit s systems\, diamond-based optics and precision motion control stages.\n\nh ttps://indico.inp.nsk.su/event/24/contributions/1808/ LOCATION: Zoom 890 9721 5207 URL:https://indico.inp.nsk.su/event/24/contributions/1808/ END:VEVENT BEGIN:VEVENT SUMMARY:Analysis of the individual annual layers elemental composition in the Lake Kucherlinskoe (Altai) varves sediments with submicron spatial res olution by scanning micro_XRF-SR with x-ray optics (poly capillary lenses) . DTSTART;VALUE=DATE-TIME:20200713T140100Z DTEND;VALUE=DATE-TIME:20200713T140200Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1811@indico.inp.nsk.su DESCRIPTION:Speakers: Andrey Darin (Sobolev Institute of Geology and Miner alogy SB RAS)\nSamples for analysis (optical thin section) were prepared f or several core intervals of Lake Kucherlinskoe bottom sediments with well visually distinguished separate annual layers (varves). The annual nature of the layers was previously confirmed by the coincidence of varvechronol ogy (layer counting) with isotopic dating (Cs-137\, Pb-210\, C-14). The th ickness of the annual layers ranged from \n\nhttps://indico.inp.nsk.su/eve nt/24/contributions/1811/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1811/ END:VEVENT BEGIN:VEVENT SUMMARY:Study of Au-Co ultrafine grained alloy by synchrotron radiation di ffractometry DTSTART;VALUE=DATE-TIME:20200714T115000Z DTEND;VALUE=DATE-TIME:20200714T121000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1813@indico.inp.nsk.su DESCRIPTION:Speakers: Timofey Tolmachev (M.N. Mikheev Institute of Metal P hysics of the Ural Branch of the Russian Academy of Sciences (IMP UB RAS)) \nUltrafine grained Au-Co alloys were prepared by high pressure torsion (H PT) technique. The severe plastic deformation was carried out at room and cryogenic temperatures. A consolidated alloy is formed from the initial po wder mixture of metals in an equiatom ratio after mechanical alloying. The n\, synchrotron radiation diffractometry of the obtained samples was carri ed out. It was found that after deformation at room temperature an fcc sub stitutional supersaturated solid solution formed. Changing the deformation temperature to cryogenic leads to greater dissolution of Co. This result corresponds to the increased mechanical and physical properties of the Au- Co alloys after cryo-HPT processing than after room one.\n\nDiffraction ex periments were performed at the SR beamline №4 of the VEPP-3 storage rin g.\nThe research was carried out within the state assignment of Ministry o f Science and Higher Education of the Russian Federation (theme “Рressu re” No. АААА-А18-118020190104-3)\, supported in part by RFBR (proje ct No. 19-32-60039).\n\nhttps://indico.inp.nsk.su/event/24/contributions/1 813/ LOCATION: Zoom 890 9721 5207 URL:https://indico.inp.nsk.su/event/24/contributions/1813/ END:VEVENT BEGIN:VEVENT SUMMARY:Linear dichroism of NEXAFS spectra and molecular orientation in po lypyrrole and polyaniline films electrodeposited on HOPG and vitreous carb on DTSTART;VALUE=DATE-TIME:20200715T080000Z DTEND;VALUE=DATE-TIME:20200715T082000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1816@indico.inp.nsk.su DESCRIPTION:Speakers: Alexander Syugaev (Udmurt Federal Research Center\, Ural Branch of Russian Academy of Sciences 132 Kirov Street\, 426000 Izhev sk\, Russia)\nIn this work\, we have studied the structural anisotropy of polyaniline and polypyrrole films depending on the type of conductive carb on substrates\, including highly oriented pyrolytic graphite (HOPG) and vi treous carbon being a fullerene-like material in its structure. The NEXAFS spectra were measured at both carbon and nitrogen K absorption edges. To analyze the chemical structure of the polymers\, X-ray photoelectron spect ra were additionally measured. The measurements were performed at the Russ ian-German beamline at BESSY II (HZB\, Berlin).\nIt has been found that po lyaniline films are predominantly disordered\, regardless of the substrate material used. Most polypyrrole films have shown a pronounced dichroism o f the NEXAFS spectra\, indicating their structural anisotropy. The nature and intensity of the changes observed in the NEXAFS spectra when varying t he measuring geometry turned out to be the same for the HOPG and vitreous carbon for most of thin films\, which indicates a weak effect of the subst rate structure on the molecular arrangement of polypyrrole films. The spec tra measured at both edges have shown a significant decrease in π* resona nces observed on going from grazing incidence to normal one. Based on the data obtained\, the tilt angle has been estimated to be approximately 40 d egrees for the pyrrole rings of the polymer.\nIt has been found that the s ubstrate affects molecular arrangement only in thick long-term-deposited f ilms. In contrast to HOPG\, the films deposited on vitreous carbon have sh own greater fraction of charge carriers\, which are bipolarons and quatern ary nitrogen derivatives\, in the polymer structure. Such films have demon strated a relatively weak linear dichroism of the spectra\, which may indi cate a disordering of the films due to the indicated change in the chemica l structure of the polymer.\nThis work was supported by the Russian Founda tion for Basic Research (No.16-43-180228) and bilateral Program "Russian-G erman Laboratory at BESSY II".\n\nhttps://indico.inp.nsk.su/event/24/contr ibutions/1816/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1816/ END:VEVENT BEGIN:VEVENT SUMMARY:A step-wise tapered undulator for the quick-EXAFS beamline at the Siberian Circular Photon Source DTSTART;VALUE=DATE-TIME:20200713T131400Z DTEND;VALUE=DATE-TIME:20200713T131500Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1814@indico.inp.nsk.su DESCRIPTION:Speakers: Andrei Trebushinin (Novosibirsk State University)\nS ynchrotron radiation (SR) provides a powerful tool for studying materials with X-rays in a wide energy range. A combination of high photon flux and flexibility in photon energy tunability allows exploiting SR for absorptio n and emission spectroscopy techniques such as XAS\, XANES\, XES. Some sop histicated techniques like\, for example\, quick X-ray Absorption Fine str ucture (qXAFS) spectroscopy allow to quickly measure the XAS spectrum. qXA FS is based on the use of a fast monochromator that scans through a broad spectral range (1 keV) providing data acquisition in less than 100 ms. How ever\, modern SR sources equipped with superconducting undulators require new approaches for generating radiation with such bandwidth and still reta in the advantage of undulator radiation compared to other broadband source s.\nIn this research\, we propose to use a stepwise tapered magnetic field configuration for the superconducting undulator: we gradually change the magnetic field along the device. An undulator is effectively split into ce lls\, each with a slightly different magnetic field\, such that a given ha rmonic of the radiation emitted in each cell is shifted by half of its ban dwidth. The contribution from the segments sums up to a continuous spectru m with the desired total bandwidth of 1 keV.\nWe studied the performance o f this device both analytically and numerically including propagation of t he emitted radiation up to the sample location. We also studied how propag ation and spatial filtering affects radiation spectral density. This resea rch serves as a conceptual design for the quick-EXAFS beamline at the Sibe rian Circular Photon Source (SKIF ― the Russian acronym) in Novosibirsk\ , Russia.\n\nhttps://indico.inp.nsk.su/event/24/contributions/1814/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1814/ END:VEVENT BEGIN:VEVENT SUMMARY:Development of SRXFA method with the hard X-ray range for paleocli mate reconstruction (region of Lake Baikal) on the storage ring VEPP-4M DTSTART;VALUE=DATE-TIME:20200713T135800Z DTEND;VALUE=DATE-TIME:20200713T135900Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1005@indico.inp.nsk.su DESCRIPTION:Speakers: Aleksandr Legkodymov (Budker Institude of Nuclear Ph ysics)\nThe aim of the research was to identify trends and changes of mois ture supply\, global and local climate regime of the Central ecological zo ne of the Baikal natural territory (the Selenga River). For this\, wet sed iment core samples were analyzed by scanning X-ray fluorescence spectromet ry (SRXFA scanning) in the context of paleoclimate studies. The new SRXFA station on the VEPP-4M storage ring (BINP RAS) was used to determine the e lemental composition of wet cores\, which allows us to significantly expan d the set of detectable elements to 35 or more\, including lanthanides (La \, Ce\, Pr\, Nd\, Sm). The use of this technique in the study of wet botto m sediments showed a high relevance of this method when displaying short-p eriod climatic fluctuations. The obtained data can be used in an interdisc iplinary aspect\, and in particular\, when predicting the water content of Lake Baikal and as a result when planning the activities of the Angarsk H PP cascade. Work is partially supported by RFBR gant 17-29-05016 офи_м .\n\nhttps://indico.inp.nsk.su/event/24/contributions/1005/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1005/ END:VEVENT BEGIN:VEVENT SUMMARY:Superconducting elliptical undulator DTSTART;VALUE=DATE-TIME:20200713T131600Z DTEND;VALUE=DATE-TIME:20200713T131700Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1817@indico.inp.nsk.su DESCRIPTION:Speakers: Pavel Kanonik (Budker Institute of Nuclear Physics)\ nCircularly polarized photons are widely used for conducting experiments t o study the magnetic structures of matter. On the basis of superconducting coils developed at the Budker Institute of nuclear physics for a short-pe riod superconducting planar undulator\, a superconducting elliptical undul ator with a period of ~2.2 cm and an elliptic coefficient of ~ 0.7 is prop osed. The poles of the upper and lower halves of the undulator are located at an angle of 45 degrees to each other in the horizontal plane\, which c reates a periodic vertical and horizontal elliptical field of up to 1 T ve rtically and 0.7 T horizontally. There is a possibility to create a fast s witching left and right polarizations of radiation at a zero angle from t wo sequentially installed undulators by quickly switching the electron orb it using correction magnets external to the cryostat (up to hundreds of He rtz). A short prototype of an elliptical superconducting undulator was mad e and magnetic measurements were made in the bath cryostat. The paper pres ents numerical calculations of the undulator fields\, its spectra\, and th e experimentally measured field.\n\nhttps://indico.inp.nsk.su/event/24/con tributions/1817/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1817/ END:VEVENT BEGIN:VEVENT SUMMARY:Superconducting undulator with a variable configuration of the mag netic field. DTSTART;VALUE=DATE-TIME:20200713T131700Z DTEND;VALUE=DATE-TIME:20200713T131800Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1818@indico.inp.nsk.su DESCRIPTION:Speakers: Pavel Kanonik (Budker Institute of Nuclear Physics)\ nBased on coils developed at the Budker Institute of nuclear physics for a superconducting undulator with a period of 15.6 mm\, a model of a superco nducting undulator with variable polarization (SCUVP)with a period of ~32 mm is proposed. The undulator consists of two superconducting undulators p laced mutually perpendicular and powered by currents independently. Depend ing on the different currents values in the windings of the undulator\, th ere is a possibility to create both an elliptical undulator with different elliptic coefficients\, and planar undulators with linear radiation polar ization at a zero angle both horizontally and vertically. The paper presen ts numerical calculations of the undulator fields and its spectra.\n\nhttp s://indico.inp.nsk.su/event/24/contributions/1818/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1818/ END:VEVENT BEGIN:VEVENT SUMMARY:Measurement of the residual stresses dynamics in tungsten during h eating DTSTART;VALUE=DATE-TIME:20200713T142600Z DTEND;VALUE=DATE-TIME:20200713T142700Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1824@indico.inp.nsk.su DESCRIPTION:Speakers: Ilya Balash (Budker INP\, NSU)\nIn a thermonuclear r eactor plasma interacts with the divertor walls in the form of periodic he at pulses as well as constant heat load. As a result\, residual plastic de formations and mechanical stresses can occur\, which cause destruction of the divertor material. However\, these residual deformations and stresses can be relieved under the influence of constant flux of plasma and the con sequential high temperature of the material. The goal of this work was the study of residual stresses dynamics in a heated material. Residual deform ations and stresses were measured using X-ray diffractometry. The measurem ents were conducted on tungsten samples that were irradiated with an elect ron beam on the BETA facility with the purpose of modeling plasma heat loa ds. SR scattering station “Anomalous scattering” on the beam line 2 of VEPP-3 was used to measure diffractograms from which scattering angle – sample tilt angle dependencies were obtained. The experimental data was u sed for calculation of deformation and stress tensor components. To compar e heat load and residual stress profiles the measurements were conducted w ith spatial resolution. SR scattering station “Diffraction movie” was used for measuring the dynamics of residual stresses during heating. As a result of these experiments scattering angle – temperature dependencies were obtained. Residual stresses relaxation was measured and turned out to be ~75 MPa.\n\nhttps://indico.inp.nsk.su/event/24/contributions/1824/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1824/ END:VEVENT BEGIN:VEVENT SUMMARY:High Energy Imaging and Diffraction at Diamond Light Source Beamli ne I12: 11 Years of Experience and Lessons Learned DTSTART;VALUE=DATE-TIME:20200714T094000Z DTEND;VALUE=DATE-TIME:20200714T101000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1827@indico.inp.nsk.su DESCRIPTION:Speakers: Thomas Connolley (Diamond Light Source )\nThe I12 Joint Engineering\, Environmental and Processing (JEEP) beamline\, was con structed during Phase II of the Diamond Light Source. The beamline started operating in November 2009. It is located on a short (5 m) straight secti on of the 3 GeV Diamond storage ring. The insertion device is a 4.2 T sup erconducting multipole wiggler. User experiments are possible with filtere d white beam or monochromatic X-rays in the energy range 53-150 keV from a bent Laue monochromator. The beam energy enables good penetration through large or dense samples\, combined with a large beam size from the wiggler fan (1 mrad horizontally × 0.3 mrad vertically). These beam characterist ics permit the study of materials and processes inside environmental chamb ers and on sample sizes that are more representative of bulk materials. X- ray techniques available are radiography\, tomography\, energy-dispersive diffraction and monochromatic 2D diffraction/scattering. I12 has establish ed a broad user community in materials science and processing\, chemical p rocessing\, biomedical engineering\, civil engineering\, environmental sci ence\, palaeontology and physics. The majority of experiments are time res olved\, in-situ studies\, often involving processing equipment brought by users\n\nhttps://indico.inp.nsk.su/event/24/contributions/1827/ LOCATION: Zoom 890 9721 5207 URL:https://indico.inp.nsk.su/event/24/contributions/1827/ END:VEVENT BEGIN:VEVENT SUMMARY:Techniques for generation of annular surface plasmon polaritons wi th refractive binary and reflective cylindrical diffraction gratings DTSTART;VALUE=DATE-TIME:20200713T135100Z DTEND;VALUE=DATE-TIME:20200713T135200Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1016@indico.inp.nsk.su DESCRIPTION:Speakers: Boris Knyazev (Novosibirsk State University)\nThe pr opagation length of surface plasmon polaritons (SPPs) increases with incre asing wavelength\, which makes it possible to use radiation from the far-i nfrared and terahertz ranges to create communication devices in which SPPs will be carriers of information. In this paper\, we consider methods for implementing the multiplex transmission of information along cylindrical c onductors using a combination of SPPs with orbital angular momentum. The w ork was supported in parts by the RSF grant No. 19-12-00103.\n\nhttps://i ndico.inp.nsk.su/event/24/contributions/1016/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1016/ END:VEVENT BEGIN:VEVENT SUMMARY:Current status of the studies of X-ray diffraction on tungsten dur ing pulsed heat loads at the scattering station «Plasma» at the VEPP-4 s ource of synchrotron radiation DTSTART;VALUE=DATE-TIME:20200713T143100Z DTEND;VALUE=DATE-TIME:20200713T143200Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1868@indico.inp.nsk.su DESCRIPTION:Speakers: Sergey Kazantsev (Budker Institute of Nuclear Physic s)\nFusion plasma confinement at facilities based on a tokamak geometry of the magnetic field includes periodical transient heat loads to divertor p lates. The divertor plates of ITER are seem to be covered by polycrystalli ne tungsten. The tungsten tends to crack in case of the pulsed heating. Th e reasons of the crack formation are deformations and mechanical stresses caused by the sharp rise in temperature of thin surface layer. The X-ray s cattering station «Plasma» at the beamline 8 at the VEPP-4M source of sy nchrotron radiation was developed for dynamical measurements of deformatio ns and mechanical stresses in tungsten during pulsed heating simulating by laser radiation. First results were carried out on the mosaic single-crys tal tungsten. The observed evolution of the diffraction peak shape agrees with theoretical predictions based on calculations of deformation caused b y pulsed heating. Deconvolution of the residual stress distribution show g ood agreement with theoretical model of distribution of the deformations i n thin surface layer in the sample during pulsed heating. One of the most important cases was the observation of the bifurcation of the diffraction peak during the occurrence of the crack on the sample during sequential re peated irradiations of the sample. Moreover\, the first experiments on the measurements of the diffraction on polycrystalline tungsten were carried out.\n\nhttps://indico.inp.nsk.su/event/24/contributions/1868/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1868/ END:VEVENT BEGIN:VEVENT SUMMARY:Terahertz Photonics of Dence medium: from gas to liquid DTSTART;VALUE=DATE-TIME:20200714T080000Z DTEND;VALUE=DATE-TIME:20200714T083000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1825@indico.inp.nsk.su DESCRIPTION:Speakers: Alexander Shkurinov (Faculty of Physics & Internatio nal Laser Center\, Lomonosov Moscow State University)\nWe present results of our research on generation of THz radiation in liquid nitrogen. We used a dual-frequency scheme when emissions of the main laser frequency and it s second harmonic are mixed in the same medium. The research showed a poss ibility of effective conversion of optical radiation into THz radiation.\n This work is partially supported by RFBR grant №18-29-20104.\n\nhttps:// indico.inp.nsk.su/event/24/contributions/1825/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1825/ END:VEVENT BEGIN:VEVENT SUMMARY:Study of thiacalexarene conformation effect on the electronic stru cture by X-Ray Absorption Spectroscopy and quantum chemistry methods DTSTART;VALUE=DATE-TIME:20200713T141200Z DTEND;VALUE=DATE-TIME:20200713T141300Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1830@indico.inp.nsk.su DESCRIPTION:Speakers: Svetlana Lavrukhina (Nikolaev Institute of Inorganic Chemistry)\nCalixarenes (CA) and thiacalixarenes (TCA) are macrocyclic co mpounds. Calixarenes (CA) and thiacalixarenes (TCA) structure include the upper and lower rims. These molecules can be in cone conformation\, partia l cone\, 1\,2-alternate and 1\,3-alternate. An important feature of CA and TCA is the ability to functionalize molecules by substitution of upper an d / or lower rims by different functional groups\, substitution of methyle ne bridges for S\, SO\, SO2\, N\, NO bridges\, etc.\, and by changes the c onformation of molecules. This makes it possible to widely change the sele ctivity and binding efficiency of various substrates [4]\, which allows th em to be used in extraction processes\, and opens up great opportunities f or the use of CA and TCA molecules in various fields of chemistry\, biolog y\, and physics.\nAccordingly\, the question arises of the effect of confo rmation on the electronic structure and\, as a consequence\, on the physic al and chemical properties of CA and TCA molecules. The methods of X-ray e mission (XES)\, X-ray absorption spectroscopy (XANES\, EXAFS) and X-ray ph otoelectron spectroscopy (XPS)\, as well as quantum-chemical methods are h ighly characteristic and effective methods for studying the electronic str ucture of various chemical compounds.\nIn this paper\, we studied the elec tronic structure of TCA molecules by XES\, XPS\, XANES\, and quantum chemi stry. The influence of molecular conformation on RES and XANES was studied . The X-ray absorption spectra of the acyclic molecule TCA and cone confor mation and 1\,3-alternate were obtained. Quantum-chemical calculations of TCA molecules electronic structure in the cone 1\,3-alternate conformation were carried out by DFT in the ADF software package. Carbon XANES spectra were calculated in the ground state of the molecules and the Z+1 model by ADF software package and by FMDNES program. The experimental K-edges of c arbon absorption of TCA molecules cone\, 1\,3-alternate and acyclic molecu les are compared and compared with the results of quantum chemical calcula tions. Based on the carried out theoretical calculations\, it was shown th at\, the LUMO of the studied TCA molecules were constructed with the parti cipation of 2p AO carbon atoms of CH\, CS\, CO fragments constituent TCA. It is also shown that\, when passing from cone conformation to 1\,3-altern ate conformation\, the LUMO structure changes and the contribution of 2p A O CH fragments becomes dominant.\n\nhttps://indico.inp.nsk.su/event/24/con tributions/1830/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1830/ END:VEVENT BEGIN:VEVENT SUMMARY:Electromagnetic Undulator with switchable period for soft X-ray ap plication in the SKIF project DTSTART;VALUE=DATE-TIME:20200713T132000Z DTEND;VALUE=DATE-TIME:20200713T132100Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1853@indico.inp.nsk.su DESCRIPTION:Speakers: Anatoly Utkin (Budker Institute of Nuclear Physiscs) \nThe “Electronic structure” beamline is dedicated for realization dif ferent photoelectron spectroscopy application in the SKIF project\, requir es intense photon flux in the soft X-ray and VUV ranges (10 - 2000 eV). Th e generation of the undulator radiation in this range is very problematic for electron beams with 3 GeV energy. For keeping the opportunity to cover whole range\, the special undulator design with possibility doubling of t he period was proposed. The commutation of the coils groups provides chang e the undulator period from 10 to 20 cm with keeping the amplitude magneti c field (0.5 T). The undulator mode (5 cm period) gives a big flux for hig h energy edge of the range and the wiggler mode (with period 20 cm) provid es the sufficient number of the photons for soft region (down to 10 eV). S ome details of the undulator design are presented in the report.\n\nhttps: //indico.inp.nsk.su/event/24/contributions/1853/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1853/ END:VEVENT BEGIN:VEVENT SUMMARY:THz Gyrotrons: novelty\, achievements and applications DTSTART;VALUE=DATE-TIME:20200713T081000Z DTEND;VALUE=DATE-TIME:20200713T084000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1829@indico.inp.nsk.su DESCRIPTION:Speakers: Mikhail Glyavin (IAP RAS)\nTHz Gyrotrons: novelty\, achievements and applications\n\nhttps://indico.inp.nsk.su/event/24/contri butions/1829/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1829/ END:VEVENT BEGIN:VEVENT SUMMARY:Generation of Smith-Purcell radiation from an array of sub-wavelen gth particles DTSTART;VALUE=DATE-TIME:20200713T132500Z DTEND;VALUE=DATE-TIME:20200713T132600Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1896@indico.inp.nsk.su DESCRIPTION:Speakers: D.Yu. Sergeeva (National Research Tomsk Polytechnic University\, Tomsk\, Russia)\nSmith-Purcell radiation is emitted by an ele ctron moving near a periodically inhomogeneous target. The main features o f Smith-Purcell radiation is monochromaticity and relation between the wav elength of radiation and the observation angle. As during generation there is no direct scattering the electrons on the atoms of material\, this typ e of radiation can serve as a tool for non-invasive beam diagnostics. Here \, we report on the recent progress in theoretical investigation of Smith- Purcell radiation from two-periodical arrays consisting of small particles . Such targets are referred as metasurfaces or photonic crystals as well. Second period in direction perpendicular to the electron trajectory opens new possibilities for the diagnostics of relativistic electron beam\, incl uding simultaneous measuring the two emittances for the electron beams wit h asymmetric cross-section.\nThis work was supported by the Russian Scienc e Foundation\, grant № 19-72-00178.\n\nhttps://indico.inp.nsk.su/event/2 4/contributions/1896/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1896/ END:VEVENT BEGIN:VEVENT SUMMARY:Angle-resolved photoemission spectroscopy (I05-ARPES) beamline at Diamond: getting insight into electronic structure of solids DTSTART;VALUE=DATE-TIME:20200715T092000Z DTEND;VALUE=DATE-TIME:20200715T095000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1828@indico.inp.nsk.su DESCRIPTION:Speakers: Timur Kim (Diamond Light Source)\nAngle-resolved pho toemission spectroscopy (ARPES) has proven to be particularly successful f or the investigation of the electronic structure of solids and their surfa ces. A synchrotron radiation beamline in a vacuum ultraviolet (VUV) to sof t x-ray photon energy range of 18-240 eV and a photon flux up to 2·10^13 ph/s have been constructed at the 3 GeV Diamond Light Source storage ring. The instrument features a variable polarisation undulator\, a high resolu tion monochromator\, a re-focussing system to form a beam spot of 50 × 50 μm2. The end station for high resolution photoemission spectroscopy incl udes a 6-degrees-of-freedom cryogenic sample manipulator operating in the range from 7-300K. The beamline design and its performance allow for a hig hly productive ARPES experiments at an energy resolution of ~10 meV for fa st momentum-space mapping studies and at 3 meV for high resolution measure ments.\nSecond branch has nano-ARPES end-station that uses a scanning micr oscopy piezo driven sample stage and a photons in the energy range 60-100e V. Photon beam is focused to sub-micron beam-spot using Fresnel Zone plate s. Sample can be cooled down to 25K\, giving total energy resolution of ab out 30meV.\nThe overall high productivity of the instrument performance is best judged by the publication output - see website of I05–ARPES beamli ne for more information (http://www.diamond.ac.uk/I05).\n\nhttps://indico. inp.nsk.su/event/24/contributions/1828/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1828/ END:VEVENT BEGIN:VEVENT SUMMARY:Comparison of experimental data of 3D density of the expansion zon e of TATB detonation products obtained on the synchrotron radiation of VEP P-3 with computer simulation DTSTART;VALUE=DATE-TIME:20200713T143400Z DTEND;VALUE=DATE-TIME:20200713T143500Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1889@indico.inp.nsk.su DESCRIPTION:Speakers: Evgeniy Smirnov (Russian Federal Nuclear Center - VN IITF)\nUnique installations were made - an experimental synchrotron radiat ion station at the VEPP-3 / VEPP-4 accelerator complex: “Explosion”\, “Investigation of the extreme state of matter”. According to the chara cteristics of the experiments\, the station “Investigation of the extrem e state of matter” has no analogues in the world. The new stations made it possible to obtain unique data on measuring the 3D density of the expan sion zone of the detonating TATB.\nIn experiments on measuring the density of the zone of expansion of detonation products\, a difference was found between computer simulation data and data obtained in experiments using sy nchrotron radiation. The new data allowed to modernize the codes for calcu lating the detonation parameters and take into account the condensation pr ocess of the solid nano - phase during the detonation of the used detonati ng systems.\nThis work was supported by RFBR grants 19-29-12045\, 16-29-01 050\, 14-03-00770 and Ministry of Science and Education of Russia grant А ААА-А17-117030310280-6.\n\nhttps://indico.inp.nsk.su/event/24/contribu tions/1889/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1889/ END:VEVENT BEGIN:VEVENT SUMMARY:Small-Angle scattering applications to the analysis of aptamer str ucture and conformational changes DTSTART;VALUE=DATE-TIME:20200714T113000Z DTEND;VALUE=DATE-TIME:20200714T115000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1832@indico.inp.nsk.su DESCRIPTION:Speakers: Roman Moryachkov (Kirensky Institute of Physics)\nAt present different agents are developing for diagnostics and treatment of cancer - one of the main reasons of human deaths. Especially perspective e xamples are aptamers - single-stranded DNA or RNA molecules which are comp act analogs of the antibodies with low immune response\, have a short leng th (10-100 nucleotides)\, well-defined spatial structure and surface charg e distribution providing highly specific binding with their targets - prot eins in the tumor cells. It allows one to use aptamers as the agents for t he visualisation the cancer cells and tissues in organism and also as the carriers for active molecules\, labels\, nanoparticles\, toxic entities to deseased tissue cells. To define the function and parameters of the activ ity for the aptamers and to localize the specific binding epitopes on the surface of both aptamers and the target proteins\, it is necessary to know the spatial structure of these molecules.\nFor this purpose the Small-Ang le X-ray Scattering (SAXS) method was used\, which is applied in a high qu ality at the synchrotron radiation sources due to the high intensity of th e emitted X-rays\, ability to change the wavelength and beam size for the experiment. SAXS method is used to carry out the measurements on the biomo lecules in solution\, without crystallisation which is mostly impossible f or single-stranded nucleic acids. One can create a native environment for the molecules under study\, or inversely to track the conformational chang es during varying temperature\, pH and other parameters.\nHere we present the results of revealing and adjusting the 3D spatial structures of the DN A molecules using the SAXS method in solution and the molecular simulation method based on the experimental SAXS data. This combination yields an in formation about the molecule structure\, possible conformational changes\, parameters of the aptamer-protein complexation\, that in a perspective wi ll be useful to optimize the development procedure of the theranostics age nts against the socially important deseases.\n\nThis work is partially sup ported by RFBR grant №18-32-00478.\n\nhttps://indico.inp.nsk.su/event/24 /contributions/1832/ LOCATION: Zoom 890 9721 5207 URL:https://indico.inp.nsk.su/event/24/contributions/1832/ END:VEVENT BEGIN:VEVENT SUMMARY:Способ изготовления LIGA-шаблонов на основе танталовой фольги DTSTART;VALUE=DATE-TIME:20200713T133900Z DTEND;VALUE=DATE-TIME:20200713T134000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1837@indico.inp.nsk.su DESCRIPTION:Speakers: александр генцелев ()\nА.Н. Ге нцелев1\, Ф.Н. Дульцев2\,3 \n\n1 Институт ядер ной физики им. Будкера Сибирского отделе ния Российской академии наук\, 630090\, Ново сибирск\, просп. Академика Лаврентьева\, 1 1\n2 Новосибирский государственный униве рситет\, 630090\, Новосибирск\, ул. Пирогова\, 2 \n3 Институт физики полупроводников им. А.В. Ржанова Сибирского отделения Россий ской академии наук (ИФП СО РАН)\, 630090\, Нов осибирск\, просп. Академика Лаврентьева\, 13\n\nОписаны конструкция и способ изгото вления высококонтрастных самонесущих п ерфорированных (со сквозными отверстиям и) сеточных LIGA-шаблонов\, используемых в рентгеновском диапазоне длин волн λ ≈ 0\, 5÷3Å. Способ основан на плазмохимическом сквозном травлении танталовой фольги че рез металлическую алюминиевую маску\, сф ормированную на поверхности фольги поср едством фотолитографии. Шаблоны предназ начены для формирования толстых резисти вных масок толщиной 250-1000 мкм\, в частност и\, из негативного резиста SU-8\, что позвол ит создавать толстые планарные металлич еские микроструктуры\, предназначенные для управления потоками электромагнитн ого излучения терагерцевого диапазона.\n В качестве исходной заготовки LIGA-шабл она использовалась танталовая фольга то лщиной 30 мкм и диаметром ~80 мм. Заготовка шаблона проводилась через следующую пос ледовательность операций:\n1. Напыление н а рабочую поверхности заготовки тонкого (толщиной ~ 1\,5 мкм) слоя алюминия (Al).\n2. Фо рмирование резистивной маски на рабочей поверхности заготовки посредством конт актной фотолитографии из позитивного ре зиста SPR 220 (7.0).\n3. Жидкостное травление ал юминия через резистивную маску и удален ие остатков резистивной маски.\n4. Плазмо химическое травление тантала через алюм иниевую маску на глубину 30 мкм.\n\nДоклад содержит СЭМ-фотографии\, иллюстрирующи е как процесс изготовления LIGA-шаблона. П о результатам работы оформлен и получен патент RU №2721172 на изобретение: «Способ и зготовления самонесущего рентгеношабло на» / Генцелев А.Н.\, Дульцев Ф.Н. - Опубл. в Б.И.\, 2020\, №14.\n\nПри выполнении работы исп ользовалась инфраструктура Центра колл ективного пользования «Сибирский центр синхротронного и терагерцового излучен ия (СЦСТИ) на базе накопительного компле кса ВЭПП-3/ВЭПП-4М ИЯФ СО РАН\, поддержанно го Министерством образования и науки РФ (проект RFMEFI62117X0012).\n\nКлючевые слова: глуб окая рентгеновская литография\, плазмох имическое травление\, LIGA-технология\, мик роструктуры\, квазиоптические фильтры\, терагерцовый диапазон.\n\nАлександр Нико лаевич Генцелев\,\n630090\, Новосибирск\, про спект ак. Лаврентьева\, 11\nЕ-mail: ang1209@mail.ru\; Тел.: (383) 329-41-38\n\nhttps://indico.inp.nsk.su/event/24/contributio ns/1837/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1837/ END:VEVENT BEGIN:VEVENT SUMMARY:Theory of multibunch storage ring with transverse feedback DTSTART;VALUE=DATE-TIME:20200713T131900Z DTEND;VALUE=DATE-TIME:20200713T132000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1838@indico.inp.nsk.su DESCRIPTION:Speakers: NIKOLAY VINOKUROV ()\nMost of contemporary storage r ings operates in multibunch mode. In this case the transverse dynamics in the presence of feedback may be complicated. Indeed\, in general case\, th e amplified signal of a beam position monitor kicks all circulating bunche s. In this paper the stability of such system with many degrees of freedom is considered. Damping times are estimated for the simplest cases.\nResul ts of researches supported by RBRF grant 15-02-07776 were used in this wor k.\n\nhttps://indico.inp.nsk.su/event/24/contributions/1838/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1838/ END:VEVENT BEGIN:VEVENT SUMMARY:Single-color pump-probe setup at the NovoFEL facility for measurin g the temporal dynamics of relaxation in Ge:As DTSTART;VALUE=DATE-TIME:20200713T135500Z DTEND;VALUE=DATE-TIME:20200713T135600Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1835@indico.inp.nsk.su DESCRIPTION:Speakers: Valeriia Kukotenko (Budker Institute of Nuclear Phys ics)\nThe short\, narrow-band THz pulses produced by the Novosibirsk free electron laser (NovoFEL) in combination with a pump-probe experimental set up are a powerful tool to reveal information on the dynamics of resonant p rocesses. In this work\, we present our experimental setup and show some r ecent results on the relaxation of electronic impurity states in germanium at low temperatures.\n\nhttps://indico.inp.nsk.su/event/24/contributions/ 1835/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1835/ END:VEVENT BEGIN:VEVENT SUMMARY:Studying the effects of electron beam irradiation on thermal prope rties and particle size distribution of magnesium hydroxide DTSTART;VALUE=DATE-TIME:20200713T142800Z DTEND;VALUE=DATE-TIME:20200713T142900Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1834@indico.inp.nsk.su DESCRIPTION:Speakers: ThiVanAnh Nguyen (Novosibirsk National State Researc h University)\, Mikhail Mikhailenko ()\nThe aim of this work is to study t he effects of electron beam irradiation on thermal properties and particle size distribution of magnesium hydroxide. The sample was irradiated by th e high-energy electron beam at the different irradiation doses in air at r oom temperature. The high-energy electron beam was generated by electron a ccelerator model ILU-6 which is located in BINP SB RAS\, Novosibirsk\, Rus sia. The changes of thermal behaviours and particle size distribution of s tudied sample were analyzed by using thermogravimetric analysis/ different ial scanning calorimetry\, SR-XRPD and image analysis\, respectively.\nThe TGA and DSC data show that there was no changes occuring in Tmax (the tem perature of maximum rate of mass loss) values of the sample before and aft er irradiation. However\, the irradiated sample began to lose mass at the lower initial temperature as compared with this temperature of the sample without irradiation and the quantities of released water of irradiated spe cimen are higher than these values of non-irradiated one. In addition\, DS C profiles indicate that the endothermic effects of irradiated sample are stronger than that of the sample without irradiation. The SR-XRPD results also agrees with the previous TGA and DSC results.\nThe the median particl e size value (d50) of all irradiated samples is lower than d50 of non-irra diated one.\nThe results of studying of thermal behaviours and particle si ze distribution of magnesium hydroxide before and after modifying by high- energy electron beam irradiation in this work are possitive and greatly im portant\, especilally in studying polymer composite materials using magnes ium hydroxide as a flame retardant. All results indicate that high energy electron beam irradiation significantly improve the flame-retardant proper ties of studied magnesium hydroxide.\nThis work was supported by RFBR gran t 19-29-12045 and Ministry of Science and Education of Russia grant ААА А-А17-117030310280-6.\n\nhttps://indico.inp.nsk.su/event/24/contribution s/1834/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1834/ END:VEVENT BEGIN:VEVENT SUMMARY:“In situ diffraction at extreme conditions” end-station at SKI F DTSTART;VALUE=DATE-TIME:20200713T134000Z DTEND;VALUE=DATE-TIME:20200713T134100Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1840@indico.inp.nsk.su DESCRIPTION:Speakers: Sergey Rashchenko (Sobolev Institute of Geology and Mineralogy\, SB RAS)\nThe “Microfocus” beamline of SKIF storage ring i s a multi-branch undulator beamline to be commissioned in 2024. The “in situ diffraction at extreme conditions” end-station is designed for X-r ay diffraction (powder\, single crystal\, and multi-grain techniques) and total X-ray scattering from samples under high-pressure conditions (up to several million atmospheres) combined with high (up to 6000 K) and cryoge nic temperatures. Extreme conditions will be achieved using diamond anvils cells (DACs) of various designs\, as well as compact toroid (Paris-Edinbu rgh) presses. The end-station offers beam parameters suitable for solving the most demanding user tasks in the fields of Earth and planetary science s\, materials science\, physics and chemistry of the extreme state of matt er etc.\n\nThe section will use radiation of the 15th harmonic of supercon ducting undulator (resonance energy of 30.9 keV)\, with source dimensions (r.m.s.) of 9×8 μm\, divergence of 16×13 mrad\, and integrated flux of about 2×10^13 phot/s/0.1% b.w.\nThe “in situ diffraction at extreme co nditions” end-station will consist of two experimental setups: a laser h eating (LH) and general purpose (GP)\, where experiments can be carried ou t using DACs with resistive heating or cryogenic cooling\, toroid press\, etc.\n\nTo reach the smallest beam focus\, a compound refractive lens (CRL ) with ~1 m focal length will be placed in front of the sample\, collectin g a 10^10 phot/s flux into a 0.3×0.3 μm (FWHM) spot. A moderate focus mode using a pre-focusing CRL located in an optical hutch near the diamond monochromator will be also available. Using the pre-focusing CRL \, almos t the entire photon flux transmitted by the monochromator can be transport ed to the aperture of the focusing CRL. This configuration provide focusin g of larger flux (10^11 phot/s) into a 1.6×1.4 μm spot (FWHM). The flux density in both modes is about 1011 ph/s/μm2\, allowing the proposed sche me to compete with capabilities of similar beamlines of main world synchro tron facilities both in the tight focusing\, and in flux density.\n\nThe r eported study was funded by RFBR according to the research project #18-35- 20047.\n\nhttps://indico.inp.nsk.su/event/24/contributions/1840/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1840/ END:VEVENT BEGIN:VEVENT SUMMARY:X-ray diffractometers and spectrometers Bruker AXS for materials r esearch DTSTART;VALUE=DATE-TIME:20200713T115000Z DTEND;VALUE=DATE-TIME:20200713T121000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1876@indico.inp.nsk.su DESCRIPTION:Speakers: Alexandr Shevchukov (Melytec LLC)\nBruker AXS x-ray diffraction and scattering portfolio enables detailed analysis of any mate rial from fundamental research to industrial quality control providing for ward looking solutions to customers today. Applications of these qualitati ve and quantitative techniques include: phase identification\, quantitativ e analysis\, crystal structure determination\, pdf analysis (total scatter ing)\, small angle x-ray scattering\, x-ray reflectometry\, high resolutio n x-ray diffraction\, reciprocal space mapping\, residual stress\, texture . XRF spectrometers Bruker AXS combines highest accuracy and precision wit h simple and fast sample preparation for the analysis of elements from Ber yllium (Be) to Uranium (U) in the concentration range from 100 % down to t he sub-ppm-level.\n\nhttps://indico.inp.nsk.su/event/24/contributions/1876 / LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1876/ END:VEVENT BEGIN:VEVENT SUMMARY:XAFS study of stable bimetallic catalysts for selective hydrogenat ion of furfural DTSTART;VALUE=DATE-TIME:20200713T142300Z DTEND;VALUE=DATE-TIME:20200713T142400Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1901@indico.inp.nsk.su DESCRIPTION:Speakers: Vladimir Kriventsov ()\nToday catalytic reaction of the selective hydrogenation of furfural is perspective way to create of mo tor fuel components and products with high added value. Unfortunately exis ting catalysts providing high conversion of the initial furfural have not sufficiently high selectivity for the target products (70-80%)\, which ind icates the need to develop new significantly more active and selective cat alysts with high stability. In this connection\, the search for correlatio ns between structural features and the charge state of metals in deposited bimetallic clusters and their catalytic activity and selectivity in the p rocess of selective hydrogenation of various functional groups of the furf ural molecule is an urgent research task. This presentation is devoted by a study of the state and local structure of the active component of Ru-Sb\ , Fe-Sb model catalysts catalysts for selective hydrogenation of furfural by XAFS (XANES/EXAFS). The catalysts were prepared by sol-gel from organic and inorganic mono- and bimetallic complex precursors. All XAFS spectra w ere recorded at SSTRC\, Novosibirsk. The genesis of local structures and s tate metals for the prepared nano-structured catalysts were studied in det ail. The interatomic distances and corresponded coordination numbers were determined. All possible structural models were discussed. The obtained XA FS results are in good agreement with XPS\, XRD\, EDX and HRTEM data.\nThe work was carried out in the framework of the RNF project no. 18-73-10216\ , RFBR projects no. 19-05-50046\, 18-03-01251. The work was done at the sh ared research center SSTRC on the basis of the Novosibirsk FEL/VEPP-4-VEPP -2000 complex at BINP SB RAS\, using equipment supported by project RFMEFI 62119X0022.\n\nhttps://indico.inp.nsk.su/event/24/contributions/1901/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1901/ END:VEVENT BEGIN:VEVENT SUMMARY:Application of synchrotron radiation to study the surface atomic s tructure of 2D materials DTSTART;VALUE=DATE-TIME:20200715T082000Z DTEND;VALUE=DATE-TIME:20200715T084000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1843@indico.inp.nsk.su DESCRIPTION:Speakers: Igor Arkhandeev (M.N. Mikheev Institute of Metal Phy sics UB RAS\, Ekaterinburg\, Russia )\nAn important task of studying the p roperties of modern materials is to study the surface\, including determin ing the atomic and electronic structure of solid. A special place is occup ied by 2D materials where the surface structure determines the properties of the material\, such as topological insulators and other low-dimensional systems. Topological insulators\, because of the special properties of th e topologically protected surface\, are promising materials for creating s pintronic devices. In this regard\, the knowledge of the atomic surface is an actual issue that requires the use of structural methods.\nAmong the m ethods that allow to obtain information about the structure of the local e nvironment\, we can distinguish the method of X-Ray photoelectron diffract ion (XPD). Photoelectrons are generated by x-ray photons\, creating an int ernal source of electrons inside the sample\, and therefore the technique is sensitive to the type of atom. Core-level electrons have a high probabi lity of being located in the inner part of the potential\, and they can be considered as a source of localized monochromatic electron waves propagat ing from the center of the potential. Combined use with the method of phot oelectron holography allows to obtain high-quality results of reconstructi on of the atomic position.\nAlthough it is possible to obtain diffraction patterns on laboratory electronic spectrometers\, the use of synchrotron r adiation has a number of advantages. First\, synchrotron radiation can ran ge from low energies (less than 100 eV) to several keV. This implements to perform photoelectron diffraction with scanning by energy (energy-scanned XPD)\, diffraction with scanning by angle (angle-scanned XPD)\, as well a s angle-scanned XPD at different energies. Second\, the photon flux must b e high enough to accumulate a large number of points in the angular and en ergy spaces.\nThis paper presents the results of using synchrotron radiati on to implement the method of X-Ray photoelectron diffraction on the surfa ces of topological insulators - bismuth chalcogenides. The experiments wer e performed at the Bessy II synchrotron center on the U49-2 PGM1 line usin g p-polarization. The obtained experimental diffraction patterns are appli ed in the photoelectron holography method to reconstruct the surface atomi c structure of solid.\n\nThe reported study was funded by RFBR\, project n umber 19-29-12061 and was carried out within the state assignment of Minis try of Science and Higher Education of the Russian Federation (theme “Sp in” No. АААА-А18-118020290104-2).\n\nhttps://indico.inp.nsk.su/even t/24/contributions/1843/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1843/ END:VEVENT BEGIN:VEVENT SUMMARY:THE INFLUENCE OF INTERNAL BERYLLIUM MICROSTRUCTURE AND IMPURITIES ON THE CRL X-RAY OPTICAL PROPERTIES DTSTART;VALUE=DATE-TIME:20200713T132300Z DTEND;VALUE=DATE-TIME:20200713T132400Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1894@indico.inp.nsk.su DESCRIPTION:Speakers: Ivan Lyatun (X-Ray Coherent Optics Laboratory (IKBFU ))\nNovel fourth generation and updated synchrotron radiation sources requ ire highest quality X-ray optics resilient to extreme thermal and radiatio n loading while preserving their coherence and brilliance. And refractive optics is the best candidate for this task due to its extensively employed at synchrotrons and X-ray free-electron lasers. Refractive lenses are use d as condensers\, micro-radian collimators\, low-band pass filters\, high harmonics rejecters\, beam-shaping elements. Two-dimensional beryllium len ses are and remain the driving force in the development of Fourier optics\ , coherent diffraction and full-field imaging techniques. However\, the de velopment of new coherent techniques such as phase-contrast imaging and co herent diffraction microscopy demanded to revise the requirements for surf ace quality and internal structure of X-ray optic materials [1-3].\nIt is worth noting that almost all beryllium grades\, used for X-ray optics manu facturing\, are sintered materials\, which have inevitably internal micro- and nanograined structure and relatively high beryllium oxide (BeO) and o ther heavy elements concentration\, which leads to strong small- and ultra -small angular X-ray scattering and additional losses of intensity [4]. Th e influence of the beryllium microstructure and impurities on the optical properties of the compound refractive lens was studied and successfully de monstrated for the first time in the microbeam and coherent full-field har d X-ray microscopy mode [5]. The paper includes recommendations on berylli um refractive lenses and beryllium windows manufacturing processes by usin g different beryllium grades for various applications of X ray optics. We are confident that there is a reasonable choice of beryllium materials sui table for coherence related techniques allowing to use the full potential of novel X-ray sources.\nThis research was supported by the Russian Scienc e Foundation (Project No. 19-72- 30009).\n\n\n[1] A. Snigirev\, V. Kohn\, I. Snigireva\, B. Lengeler\, Nature\, 384 (1996) 49. \n[2] A. Snigirev\, I . Snigireva\, Springer Series in Optical Sciences\, 137 (2008) 255.\n[3] T . Roth\, A. Snigirev\, A.andetal. MRS Bulletin\, 42(6)\, (2017) 430-436.\n [4] I. Lyatun\, A. Goikhman\, P. Ershov\, I. Snigireva\, A. Snigirev\, Jou rnal of Surface Investigation. X-ray\, Synchrotron and Neutron Techniques \, 9 (2015) 446.\n[5] I. Lyatun\, P. Ershov\, I. Snigireva\, A. Snigirev\, Journal of Synchrotron Radiation\, 27(1)\, (2020).\n\nhttps://indico.inp. nsk.su/event/24/contributions/1894/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1894/ END:VEVENT BEGIN:VEVENT SUMMARY:SECONDARY MINERAL FORMATION MONDMILCH FROM BOTOVSKAYA CAVE (EASTER N SIBERIA) DTSTART;VALUE=DATE-TIME:20200713T140400Z DTEND;VALUE=DATE-TIME:20200713T140500Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1844@indico.inp.nsk.su DESCRIPTION:Speakers: Yulia Sholokhova (IGC SB RAS)\nMondmilch\, or moon m ilk\, is a special type of speleothems (secondary mineral formations forme d in a cave environment from a primary mineral as a result of physical and chemical reactions). This mineral formation is a soft clay-like substance with a high water content\, which becomes fluid when touched. In caves\, mondmilch is found in the form of covers\, leaks\, lumps on the walls and on the floor\, extensive deposits and small solitary formations. The compo sition of moon milk dependes on the rocks in which the underground cavity is located. It can be carbonate\, gypsum\, aluminosilicate and phosphate [ Chirienco\, 2004].\nThe questions of the moon milk origin and the variabil ity of its crystalline structure are con-troversial. It remains uncertain as the thixotropic characteristics (fluidity) of the sediment and water co ntent are changing in accordance with the features of the crystals formed the formation. It is possible that there are some regularity between the c omposition\, structure of the crystals and the physical properties of this type of sediment. There is also a hypothesis about the biogenic origin of the moon milk. It is known that microorganisms of different physiological groups were found in the secondary formation content [Hill\, Forti\, 1997 ]\, and it can be assumed that microorganism cells can act as crystallizat ion centers during the formation of moon milk\, but the hypothesis that th e microbiota is secondary in the content of moon milk and the sedimentatio n is its habitat.\nThis paper presents the data on chemical composition an d morphology of crystals of the samples of moon milk (mondmilch) from Boto vskaya cave\, which is the largest in Russia. It was determined that moon milk is characterized by increased concentrations of Ca and Sr and lower c ontents of Ti\, Mn and Fe relatively to the host rocks. The morphology of mondmilch crystals indicates that the genesis of this secondary mineral fo rmation is based on both abiogenic and biogenic mechanisms.\nIt should als o be noted that this type of sediment has been studied using the XRF SR me thod for the first time. The examination of sampled specimens provides new information on chemical composition and structure of moon milk in caves of carbonate karst.\nThis work is partially supported by RFBR grant №13- 05-90780.\nReferences\nChirienco M. The crystalline phase of the carbonate moonmilk: a terminology approach // Acta carstologica\, 33/1\, 2004. p. 2 57-264.\nHill C. A.\, Forti P.\, Cave minerals of the world // NSS. Huntsv ille\, 1997. p. 463.\n\nhttps://indico.inp.nsk.su/event/24/contributions/1 844/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1844/ END:VEVENT BEGIN:VEVENT SUMMARY:Enhancing resolution of terahertz surface plasmon resonance micros copy by ghost imaging using FEL radiation DTSTART;VALUE=DATE-TIME:20200714T114000Z DTEND;VALUE=DATE-TIME:20200714T120000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1847@indico.inp.nsk.su DESCRIPTION:Speakers: Ildus Khasanov (Scientific and Technological Center of Unique Instrumentation of the Russian Academy of Sciences)\nSurface pla smon resonance (SPR) microscopy is one of the most sensitive label-free mi croscopy method\, however\, it has a low lateral resolution. This drawback is primarily caused by the fact that surface plasmon polaritons (SPPs) ex cited by terahertz (THz) radiation propagate from their excitation spot to macro distances (about ~100 λ)\, thereby blurring the observed region by analogy with a scattering medium. To eliminate this disadvantage\, we pro pose to adapt method known as ghost imaging (GI)\, which is notable for it s tolerance to environmental aberrations between object and camera. \nThe GI established itself in the classical optical visible-range nanoscopy\, a llowing to obtain a high resolution. In the report we will present an opti cal scheme of SPR microscopy for the THz range with an additional optical arm to implement the classical GI. In the GI the image of an object $O(x\, y)$ is reconstructed by calculating the second-order correlation function (mutual intensity) between the spatial distribution of the intensity $P(x\ ,y)$ of the probing beam (patterns) and the integral intensity $S$ (regist ered by a single-pixel receiver) of the reflected (or transmitted) light i n two optical arms $(x\,y)$ and ($x'$\,$y'$): \n$$ O(x\,y) \\propto \\sum_ {i=1}^N (S_i- \\langle S \\rangle)({P(x\,y)}_i-\\langle P(x\,y) \\rangle)\ \rangle = \\langle {P(x\,y)}_i \\cdot S_i \\rangle - \\langle P(x\,y) \\ra ngle \\cdot \\langle S \\rangle\,$$ where $\\langle \\dots \\rangle = \\f rac{1}{N} \\sum_{i=1}^N$ is the averaging operator\, N is the number of in dependent patterns\, $R(x'\,y')$ is the object response function\, $S = \\ int R(x'\,y') {P(x'\,y')}_i dx' dy'$. The restored image is called a ghost image\, because it uses information about the spatial structure of light that did not interact with the object. \nIn the THz range\, the classical GI in the far field has not yet been demonstrated because it requires a TH z radiation source having a sufficient second-order coherence length excee ding the wavelength by at least 2-3 orders of magnitude. This requirement is met by light from a powerful coherent THz source of radiation transmitt ed through a transparent turbulent medium or reflected from a rough surfac e\, as a result of which the radiation acquires the statistical properties of a thermal source. To implement the classical GI in the THz range\, we propose to use the Novosibirsk free electron laser (NovoFEL) as a THz radi ation source. The high beam power of the NovoFEL provides a speckle struct ure with a pronounced profile\, which is necessary to achieve a high level of contrast in the obtained image. And large coherence length of radiatio n of the NovoFEL is necessary to ensure a large degree of correlation betw een the beams emerging from the beamsplitter\, which allows reconstructing an image with a lower noise level. \nThe work was supported by the Russia n Foundation for Basic Research (project 20-52-54004).\n\nhttps://indico.i np.nsk.su/event/24/contributions/1847/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1847/ END:VEVENT BEGIN:VEVENT SUMMARY:Determination the pattern of spreading and accumulation of essenti al and trace elements at the benthic samples by using scanning micro-XRF-S R DTSTART;VALUE=DATE-TIME:20200715T115000Z DTEND;VALUE=DATE-TIME:20200715T121000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1845@indico.inp.nsk.su DESCRIPTION:Speakers: Natalya Baturina (Novosibirsk State University)\nFor river ecosystems\, one of the site of chemical elements accumulation is b enthic assemblages. In our research 20 benthic samples were collected from small rivers and streams from industrial and nature areas of Novosibirsk region. Benthic invertebrates were fixed at 75% ethanol and identified up to the family taxonomical level at the laboratory. After identification sa mples were dried up to stable weight\, animals from each taxonomical group were placed at the conductive tape for further investigation.\nThe analys is was carried out using the µXRF-SR according to the standard certified method at the experimental station "Elemental analysis" in the SCSTR (Budk er INP SB RAS). Experimental conditions: excitation energy 21 keV\, dimens ions of the exciting radiation beam 0.5 mm in height and 10 mm in width of the sample. Measuring time for one point was 100 s. The contents of more than 20 elements\, including essential Cl\, K\, Ca\, Mn\, Fe\, and trace e lements Ti\, V\, Cr\, Ni\, Cu\, Zn\, As\, Rb\, Sr\, Y\, Zr\, Nb\, Mo\, Pb were determined. The concentration range for essential elements was 150 - 10000 ppm\, for trace elements 0.3 – 1500 ppm.\nScanning was done in two directions – the length and width of the sample animal. The profile of scanning was compared with photos from the electronic microscope. That gav e us an opportunity to find out a specific locus of accumulation of some e lements. Results obtained shown patchy spreading distribution of elements in the samples\, that could be interpreted by various forms of chemical co mpounds\, which included explored elements. So\, some elements concentrati on could be determined as a part of the exoskeleton or outside contaminati on on the surface of an animal. For more complete result 3d scanning with the function of focused X-ray optics could be used.\nAll obtained data wil l be applied for the determination of the role of benthic communities' mec hanisms of essential and trace elements accumulation in river ecosystems. Moreover\, our data will be useful for the assessment of the ecological st atement of rivers and streams of industrial areas of Novosibirsk region.\n The work was carried out in the framework of the RFBR projects no. 19-05-5 0046. The work was done at the shared research center SSTRC on the basis o f the VEPP-4-VEPP-2000 complex at BINP SB RAS\, using equipment supported by project RFMEFI62119X0022.\n\nhttps://indico.inp.nsk.su/event/24/contrib utions/1845/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1845/ END:VEVENT BEGIN:VEVENT SUMMARY:The NovoFEL Optical Diagnostics Upgrade DTSTART;VALUE=DATE-TIME:20200713T130900Z DTEND;VALUE=DATE-TIME:20200713T131000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1015@indico.inp.nsk.su DESCRIPTION:Speakers: D. Reshetov (Budker INP)\, O.I. Meshkov (Budker INP) \, V.L. Dorokhov (Budker INP)\, Vladislav Borin (BINP)\nNovosibirsk Free E lectron Laser (NovoFEL) is based on rather complicated accelerator system. Complex uses three separate FELs installed on various Energy Recovery Lin acs (ERLs). ERLs operate with high average beam current (about 5 mA). The severe restrictions on the electron bunch parameters for the lasing requir e the beam diagnostic system. The transverse beam profile measurement syst em uses an electron beam synchrotron radiation (SR) from the bending magne t and the optical transition radiation (OTR) from the aluminum foil. This allows adjusting the beam parameters before the undulator and measuring th em after lasing. This year\, the diagnostic complex has been improved by t he installation of additional SR monitor at the place with a large dispers ion function and spectrometer for studying the undulator radiation. The re cent results of the beam dynamics measurements and calculations are presen ted.\nThis work was supported by grant 18-72-00123 of Russian Science Foun dation.\n\nhttps://indico.inp.nsk.su/event/24/contributions/1015/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1015/ END:VEVENT BEGIN:VEVENT SUMMARY:The nongaussian behaviour of the spread function of the x-ray poly capillary lens: characteristical cases and new nonstandard approximation m odels DTSTART;VALUE=DATE-TIME:20200713T140500Z DTEND;VALUE=DATE-TIME:20200713T140600Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1849@indico.inp.nsk.su DESCRIPTION:Speakers: Dmitry Sorokoletov ()\nThe spread function of a x-ra y polycapillary lens may be approximated very accurately by a laterally sy mmetrical gaussian function [1]. However it is true statement for the spac ial fields whose are near to a focus of the lens only. We carried out the research to clarify a specifics of the lateral spacial distribution of the intensity of x-ray radiation around more spacious areas (placed more farl y from lens' focus along axial directions). As the result we found that in many cases a range of characteristical features of nonstandard behavior f or the spread function are exist. They may be asymmetrical behavior of gau ssian peak (most frequently)\, superposition of two peaks (whose are respe ctively big and small)\, strong nongauss behavior\, etc.\n We consider for all these effects to be explained fully by a nonaccuracy adjustment of an gles and position of the polycapillary lens because of a limited precision of applied piesomechanics. Herewith most acceptable of the quality of the adjustment of the lens refers to cases of asymmetrical behavior of gaussi an peak of the spread function of the lens. In the frame of this research a range of series of scanning experiments for detecting the spread functio n of the x-ray lens was carried out. The numbers of these series and the e xperiments of each series were be about 10. (Each series corresponded to a n individual case of adjustment of the polycapillary lens\, whereas a sing le experiments in each series referred to an individual case of spacial po sition of interesting field of spread function along the axial direction.) \n We selected the range of the cases of the detected spread functions in order to be proceed by the quantitative analysis (approximation) those ref er to the cases of most good quality of lens' adjustment. After that a var ious of approximation models (asymmetrical gaussians\, extreme\, logistpk\ , lorentz peaks [2]\, some our models) were tested by us. As the result it was shown that most good results refer to the cases of the extreme peaks approximation model additionally modified by us.\nThe scanning experiments were carried out at Synchrotron and Terahertz Research (INP SB RAS\, Novo sibirsk) and the Kurchatov Complex of Synchrotron-Neutron Research (KISI\, Moscow) using a confocal X-ray microscope. The work was carried out in th e framework of the RFBR projects no. 19-05-50046. The work was partly done at the shared research center SSTRC on the basis of the VEPP-4-VEPP-2000 complex at BINP SB RAS\, using equipment supported by project RFMEFI62119X 0022.\n[1] Mantouvalou\, W. Malzer\, and B. Kanngiesber\, “Quantificatio n for 3D Micro X-ray Fluorescence\,” Spectrochimica Acta. Pt. B 77\, 9 –18 (2012).\n[2] http://www.originlab.com/pdfs/16_CurveFitting.pdf\n\nht tps://indico.inp.nsk.su/event/24/contributions/1849/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1849/ END:VEVENT BEGIN:VEVENT SUMMARY:Customized Testing Systems for Beamlines DTSTART;VALUE=DATE-TIME:20200713T121000Z DTEND;VALUE=DATE-TIME:20200713T123000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1850@indico.inp.nsk.su DESCRIPTION:Speakers: Alexandr Dolgikh ()\nMaterial testing mostly common carried out after irradiation the sample using classical standalone labora tory grade testing machines due to size limitations near the beamlines. Ho wever\, the most valuable results could be recieved within simultaneous ir radiation and mechanical stress.\n50+ years of experience in development a nd productoin of material testing systems made possible to create special designed\, compact and reliable solutions. \n(The machines are used by: Sy nchrotron Radiation Facility ANKA\, Photon source BESSY II\, Technical Uni versity of Munich & FRM II Neutron Facility\, University of Science and Te chnology Beijing (USTB) & Shanghai Synchrotron Radiation Facility (SSRF))\ n\nhttps://indico.inp.nsk.su/event/24/contributions/1850/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1850/ END:VEVENT BEGIN:VEVENT SUMMARY:Ni nanocoatings on porous alumina: structural properties vs matric es porosity DTSTART;VALUE=DATE-TIME:20200715T095000Z DTEND;VALUE=DATE-TIME:20200715T101000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1848@indico.inp.nsk.su DESCRIPTION:Speakers: Rishat Valeev (Physical-Technical Institute of UdmFR C UB RAS)\nDuring last decade materials science developing the methods of obtaining and studying of new materials for magnetic and catalytic aplicat ions based on nanostructured thin films and nanostructures of different me tals [1\,2]. Nickel due to there high magnetic and cathodic properties has technological and scientific interest. It should be noted that the magnet ic and catalytic properties depend on the size of material nanoparticles\, so there is an increased interest in the literature to nickel based mater ials having a developed surface due to the formation of metal nanoparticle s with different morphology [3]. This is due to the large contribution of surface electronic states of the metal with particles size decreasing. It is also strongly affected by the structural-phase state\, local atomic and electronic structure\, surface morphology.\nSynchrotron facilities give m ore precise and reliable information about structure and electronic proper ties of materials. For instance Extended X-Ray Absorption Fine Structure ( EXAFS) technique is a powerful method of obtaining of structural informati on and X-Ray Absorption Near Edge Structure (XANES) allows to investigate an electronic structure of materials. For the visualization of surface mor phology a method of Scanning Electron Microscopy (SEM) are widely used.\nI n this work we propose templating approaches based on the formation of Ni nanocoatings on the surface the porous alumina films with highly ordered a nd controlled diameter of holes. Porous alumina were obtained by anodizati on process of aluminum foils at different (40\, 80 and 120 V) voltages. We trying to identify the influence of pores sizes on the surface morphology and local atomic structure of materials. All of the above defines the sco pe of work: EXAFS and SEM investigations of Ni nanocoatings to form the ba sis of their magnetic and catalytic properties.\nThis work is supported by Russian Federation Assignment (project № AAAA-A17-117022250040-0)\, RFB R project № 18-03-01251. The work was done at the shared research center SSTRC on the basis of the Novosibirsk FEL/VEPP-4-VEPP-2000 complex at BIN P SB RAS\, using equipment supported by project RFMEFI62119X0022. SEM inve stigations were carried out using facilities of shared research center “ Surface and novel materials” UdmFRC UB RAS supported by project RFMEFI62 119X0035.\n\n1. Novel Magnetic Nanostructures Unique Properties and Applic ations. Ed. by N. Domracheva\, M. Caporali\, E. Rentschler. Elsevier\, Net herlands\, 2018\, 490 p.\n2. Y. Attia\, M. Samer\, Renewable and Sustainab le Energy Reviews\, 79\, 878 (2017).\n3. D.A. Dalla Corte\, C. Torres\, et al.\, Int. J. Hydr. Energy 37\, 3025 (2012).\n\nhttps://indico.inp.nsk.su /event/24/contributions/1848/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1848/ END:VEVENT BEGIN:VEVENT SUMMARY:LUMINESCENT SPECTROSCOPY OF Pr3+ IONS IN SOME PHOSPHATES\, BORATES AND SILICATES USING X-RAY SYNCHROTRON RADIATION FROM VEPP-3 STORAGE RING DTSTART;VALUE=DATE-TIME:20200715T101000Z DTEND;VALUE=DATE-TIME:20200715T103000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1852@indico.inp.nsk.su DESCRIPTION:Speakers: Sviatoslav Kiselev (Ural Federal University)\nLUMINE SCENT SPECTROSCOPY OF Pr${}^{3+}$ IONS IN SOME PHOSPHATES\, BORATES AND SI LICATES USING X-RAY SYNCHROTRON RADIATION FROM VEPP-3 STORAGE RING\n\nKise lev S.A.${}^{1\,\\ a)}$\, Pustovarov V.A.${}^{1\,\\ b)}$ and Bettinelli M. ${}^{2\,\\ c}$${}^{)}$\n\n${}^{1}$Institute of Physics and Technology\, Ur al Federal University\, 19 Mira st.\, Ekaterinburg\, 620002\, Russia\n\n${ }^{2\\ }$Laboratory of Luminescent Materials\, Department of Biotechnology \, University of Verona and INSTM\, UdR Verona\, Strada Le Grazie 15\, I- 37134 Verona\, Italy\n${}^{a)}$Corresponding author: sviat-kiselev@yandex. ru\n${}^{b)}$v.a.pustovarov@urfu.ru \n${}^{c}$${}^{)}$ marco.bettinelli@un ivr.it \n\n\n This paper reports the spectroscopic properties of praseodym ium-doped phosphates\, borates and silicates. Spectra of X-ray excited lum inescence and its decay kinetics were measured. Studied samples demonstrat e interconfigurational 5$d$-4$f$\, intraconfigurational 4$f$-4$f$ transiti ons and defect-related luminescence. Comparative analysis of spectroscopic properties and application perspectives is presented.\n\nInorganic scinti llating materials are being actively investigated in terms of their applic ation in fields of nuclear physics\, medicine tomography and detecting sys tems. Ce${}^{3+}$ ions impurity are widely used\, but praseodymium ions ar e able to shift the emission spectra of interconfigurational transitions t o higher energy region. The Pr${}^{3+}$ 5$d$-4$f$ emission appears\, when a sufficiently strong crystal field shifts the lowest 4$f$${}^{1}$5$d$${}^ {1}$ excited state below the ${}^{1}$S${}_{0}$ level [1].\n\nPolycrystalli ne samples KLuP${}_{2}$O${}_{7}$\, Li${}_{6}$Y(BO${}_{3}$)${}_{3}$\, LiY${ }_{6}$O${}_{5}$(BO${}_{3}$)${}_{3}$\, LiSrPO${}_{4}$\, Sr${}_{9}$Sc(PO${}_ {4}$)${}_{7}$\, K${}_{3}$Lu(PO${}_{4}$)${}_{2}$\, K${}_{3}$LuSi${}_{2}$O${ }_{7}$ doped with Pr${}^{3+}$ ions were synthesized using a solid state re action and XRD verified for phase purity at the Laboratory of Luminescent Materials\, University of Verona (Italy). \n\nThe measurements of emission spectra and luminescence decay kinetics upon excitation with non-monochro matic X-ray synchrotron radiation (E = 3--60 keV\, pulse FWHM $\\mathrm{\\ sim}$ 1 ns\, frequency $\\mathrm{\\sim}$ 8 MHz) were performed at the beam line \\#6 of the VEPP-3 storage ring at Budker Institute of Nuclear Physic s (Russia). Stroboscopic method of electron-optical chronography with sub- nanosecond time resolution was used. The detection system included a SOL I nstruments MS2004 monochromator equipped with a high-speed LI-602 dissecto r [2].\n\nFor example\, Fig. 1\, (a) demonstrate spectra of X-ray excited luminescence of some studied samples\, LiSrPO${}_{4}$:Pr${}^{3+}$\, K${}_{ 3}$LuSi${}_{2}$O${}_{7}$:Pr${}^{3+}$ and Li${}_{6}$Y(BO${}_{3}$)${}_{3}$:P r${}^{3+}$. Two principal regions can be observed there: 220-350 nm -- reg ion of interconfigurational 5$d$-4$f$ transitions in Pr${}^{3+}$ impurity ions\, and 480-650 nm -- region of intraconfiguration 4$f$-4$f$ transition . Decay kinetics of interconfigurational radiation transitions are present ed in Fig. 2\, (b). Each of them can be approximated with multiexponential description I(t) = $\\mathit{\\Sigma}$(A${}_{i}$*exp(-t/$\\tau$${}_{i}$) + I${}_{0}$. Obtained luminescence lifetime parameter $\\tau$${}_{i}$ is vital for understanding of luminescence dynamics. \n\n[Figure1][1]\n\nFIGU RE 1. Spectra (a) and kinetics (b) of X-ray excited luminescence\,T = 295 K. The wavelength and the main lifetime $\\tau$${}_{i}$ are indicated when measuring the luminescence decay kinetics\n\n1. A.M. Srivastava\, ``Aspec ts of Pr${}^{3+}$ luminescence in solids\,'' J. Lumin.\, vol. 169\, pp. 4 45-449\, January 2016.\n\n2. V.A. Pustovarov\, E.I. Zinin\, A.L. Krymov an d B.V. Shulgin\, ``Some peculiarities of the luminescence of inorganic sci ntillators under excitation by high intensity synchrotron radiation\,'' Re v. Sci. Instrum.\, vol. 63\, pp. 3521\, September 1992.\n\n\n [1]: https ://yadi.sk/i/8Et_AOfSitR60g\n\nhttps://indico.inp.nsk.su/event/24/contribu tions/1852/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1852/ END:VEVENT BEGIN:VEVENT SUMMARY:Measuring Installation for Determining Current-Voltage Characteris tics at Liquid Helium Temperature DTSTART;VALUE=DATE-TIME:20200713T131000Z DTEND;VALUE=DATE-TIME:20200713T131100Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1776@indico.inp.nsk.su DESCRIPTION:Speakers: Alexandr Brodnikov (inp.nsk.su (l.8-2))\nMeasuring p lant are made on the base of cryostat КГ-60/300-1 in internal cavity of which\, in liquid helium medium\, solenoid is located\, and in its central part insert-holder with sample is located. Power supply of solenoid and t ested sample\, by current leads located in the upper cover of cryostat\, a re performed by power supplies of Danfysik - system 8800 company with the help of PC and control program developed in BINP. In order to test the pla nt for determination of current–voltage characteristics (CVC) in superco nductors at helium temperatures\, test measurements were carried out accor ding to the method MVI 400-423/8-2018 developed by JSC VNIINM [2]. Measure ments were made on composite wire samples based on the Nb-Ti alloy\, 0\,08 m long and 0\,5 and 0\,85 mm diameters cut from the wires of standard bat ches\, with CVC being indicated by the manufacturers of these superconduct ors. He calculated value of the critical current specified by the manufact urer of the measured superconducting wires at the 7 T shall be 200 A and 3 72 A. The value we have obtained is 212 A and 382 A\, which is less than 1 0% [4] and this corresponds to the limit of the permissible basic absolute error of the meter В7-99 which is ± (1\, 5·10-3 + 4\, 5·10-5 | U |) m V (U - measured voltage\, mV). As can be seen\, the operability of the mea suring unit for determining the actual critical current values is confirme d\, and obtaining a more accurate measurement result will allow modern pre cision digital measuring equipment\, with the permissible basic absolute e rror of ± 0\,0025%+ 0\,02 nV.\n\nhttps://indico.inp.nsk.su/event/24/contr ibutions/1776/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1776/ END:VEVENT BEGIN:VEVENT SUMMARY:Development of indirect cooling cryogenic system with nitrogen and helium heat pipes for superconducting insertion devices in BINP. DTSTART;VALUE=DATE-TIME:20200713T132100Z DTEND;VALUE=DATE-TIME:20200713T132200Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1858@indico.inp.nsk.su DESCRIPTION:Speakers: Valeriy Tsukanov (BINP)\nThe using of indirect cool ing cryogenic system based on cryocoolers for superconducting insertion d evices (wigglers and undulators) gives opportunity\, in contrast to magnet s immersed into liquid helium\, to reduce the size of the magnetic gap due to the removal from it the walls of the helium vessel and increase the m agnitude of the magnetic field. To increase the cooling efficiency of such a magnet\, which is in vacuum and does not have direct thermal contact wi th cryogenic liquids\, the heat pipes of siphon type filled by nitrogen and helium is used as the heat conductors for connecting of superconductin g magnet with cryocoolers stages. The article describes the principle of o peration\, design and application features of the heat pipes on several in directly cooled superconducting insertion devices created in BINP.\n\nhttp s://indico.inp.nsk.su/event/24/contributions/1858/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1858/ END:VEVENT BEGIN:VEVENT SUMMARY:Nitrogen doped diamond single crystals for x-ray optics applicatio ns DTSTART;VALUE=DATE-TIME:20200714T131000Z DTEND;VALUE=DATE-TIME:20200714T133000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1856@indico.inp.nsk.su DESCRIPTION:Speakers: Sergey Shevyrtalov (Immanuel Kant Baltic Federal Uni versity\, Kaliningrad\, Russia)\nHere we present our latest achievements r egards diamond single crystal growth and characterization by means of X-ra y diffraction. Synthetic diamond crystals were grown by the temperature gr adient method using a high-pressure apparatus of the ‘‘split sphere’ ’ type (BARS) at P=5.7 GPa and T=1550 °C with the use of a Ni0.7Fe0.3 a lloy as a solvent-catalyst. It has been shown that dislocation-free region s in these crystals occupy about 58 mm3. Two diamond plates oriented by (1 11) plane with 3x3 mm2 surface area were cleaved from the outer parts of t wo single crystals\, followed by mechanical polishing from both sides. It was found that the plates contained nitrogen impurities predominantly in t he form of isolated substitutional atoms (C-centers\, type Ib) with concen trations in the range of 100–150 ppm.\nDiamond plates were characterized by means of high-resolution rocking curve imaging (RCI) performed at P01 beamline at DESY. The samples were studied at room temperature in the Brag g geometry using monochromatic radiation with energy of 14.41 keV. The ene rgy resolution provided by high-resolution Si (4 0 0)(10 6 4) monochromato r was ∆E/E = 10-7. Rocking curves were collected from (333) reflection i n a pixel-by-pixel manner by 2D-detector with 55-µm pixel size with a tot al surface area of 256x256 pixels. RCI showed an overall good quality of t he diamond plates close to the central area. The FWHM mean value at the de fect- and strain-free areas lie in scope of 0.5 µrad deviation from the t heoretical value that is suitable for XFEL and 4th generation synchrotron sources optical applications like beam splitters and monochromators. Defec t- and strain-free areas were found to be 1x2.2 and 1x1.6 mm2. The working area of the crystal #1 exceeds 50% of the whole crystal surface. Further improvement of the cutting in couple with polishing process will lead to t he large Ib diamond crystals (more than 6 mm2) with larger working area.\n \nhttps://indico.inp.nsk.su/event/24/contributions/1856/ LOCATION: Zoom 890 9721 5207 URL:https://indico.inp.nsk.su/event/24/contributions/1856/ END:VEVENT BEGIN:VEVENT SUMMARY:Generation and use of coherent X-ray beams at future SKIF storage ring DTSTART;VALUE=DATE-TIME:20200715T070000Z DTEND;VALUE=DATE-TIME:20200715T072000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1860@indico.inp.nsk.su DESCRIPTION:Speakers: Sergey Rashchenko (Novosibirsk State University)\nIn 1990s\, the emergence of the 3rd generation synchrotron user facilities e quipped with undulator sources\, stimulated pioneering works on interactio n of coherent X-ray beams with matter (Brauer et al. 1995)\, resulted in t he development of X-ray photon correlation spectroscopy (XPCS) technique\, capable to probe nanoscale fluctuations up to kHz frequencies using dynam ics of speckle pattern given by scattering of coherent X-ray beam from the sample. More recently (and highly aided by the development of modern high -throughput data analysis algorithms)\, coherent X-ray diffraction imaging (CXDI)\, also known as lensless imaging\, revolutionized the field of X-r ay microscopy\, finally bringing users the possibility of non-destructive 2D and 3D imaging of complex structures with unprecedented ~10 nm resoluti on. However\, strict requirements to transverse coherence of X-ray probe p ut serious limits on further development of CXDI-based techniques at the 3 rd generation facilities\, where coherent flux after spatial filtering bec omes unacceptably small at energies above ~20 keV. At the same time\, the latter was used as one of the strongest arguments of the user community fo r push towards construction of MBA-based 4th generation of storage rings w ith ultra-low-emittance.\nSince coherent flux can be simply expressed as $ F_{coh}={\\lambda^2\\over4}B$\, where $\\lambda$ is X-ray wavelength\, and *B* – source brightness\, the demand for higher coherent flux is often translated as demand for higher brightness – a recognizable motto for bo th accelerator and user communities. From the same relationship one can al so easily see that even more brightness is needed to obtain the same coher ent flux at shorter wavelengths / higher energies. Another expression $F_{ coh}={\\lambda^2\\over 16\\pi^2}F/\\varepsilon_{tot}$\, where *F* is total flux\, and $\\varepsilon_{tot}$ – 4D phase volume of X-ray beam\, illus trates that it is the phase volume of the undulator X-ray source that shou ld be minimized in order to deliver a maximum number of coherent photons t o end-user (given total flux has already reached its limit imposed by mach ine current and undulator technology). Whereas at the 3rd generation facil ities the phase volume of undulator source was dominated by electron beam emittance with negligible influence of other factors\, the estimation and minimization of undulator source phase volume at 4th generation facilities requires more elaborate approach taking into account electron beam energy spread\, undulator phase error\, and matching of phase-space ellipses bet ween electron and X-ray beams.\nIn our contribution we will present estima tions of coherent flux at different energies available for future users of ultra-low-emittance SKIF storage ring (to be commissioned in 2023) and di scuss ways of its optimization\, as well as future scientific program of u ser experiments with diffraction-limited X-ray beams.\n\nBrauer\, S.\, Ste phenson\, G.B.\, Sutton\, M.\, Brüning\, R.\, Dufresne\, E.\, Mochrie\, S .G.J.\, Grübel\, G.\, Als-Nielsen\, J.\, and Abernathy\, D.L. (1995) X-Ra y Intensity Fluctuation Spectroscopy Observations of Critical Dynamics in F${\\mathrm{e}}_{3}$Al. Physical Review Letters\, 74\, 2010–2013.\n\nhtt ps://indico.inp.nsk.su/event/24/contributions/1860/ LOCATION: Zoom 890 9721 5207 URL:https://indico.inp.nsk.su/event/24/contributions/1860/ END:VEVENT BEGIN:VEVENT SUMMARY:The modification of optical properties of the surfaces by the glan cing angle deposition of TiO2 DTSTART;VALUE=DATE-TIME:20200715T104000Z DTEND;VALUE=DATE-TIME:20200715T110000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1857@indico.inp.nsk.su DESCRIPTION:Speakers: Aleksey Lemzyakov (Budker INP SB RAS)\nThis work con siders the optical properties and structure of thin films of titanium diox ide formed by glancing angle deposition to improve light yield of scintill ation materials. The experimentally obtained value of the refractive index was about 1.2\, which is almost two times less than the refractive index of crystalline titanium dioxide. This allows you to use this method to mod ify the optical properties of the surfaces of scintillators with a large r efractive index.\nThis work is partially supported by RFBR grant №19-42- 540009 p_a.\n\nhttps://indico.inp.nsk.su/event/24/contributions/1857/ LOCATION: Zoom 890 9721 5207 URL:https://indico.inp.nsk.su/event/24/contributions/1857/ END:VEVENT BEGIN:VEVENT SUMMARY:Structural study of Pt-complexes in aqueous solution by EXAFS DTSTART;VALUE=DATE-TIME:20200713T141500Z DTEND;VALUE=DATE-TIME:20200713T141600Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1865@indico.inp.nsk.su DESCRIPTION:Speakers: Vladimir Kriventsov ()\nThis work is devoted to the study of the process of hydrolysis of chloride Pt(II) complexes and Pt(IV) nitrate complexes existing in aqueous solutions of different nature by EX AFS spectroscopy.\nThe deposited platinum catalysts are inevitable in vari ous industrial oxidation and reduction processes due to their unique prope rties\,. The variety of catalytic properties is determined by the possibil ity of varying the dispersion and lability of the active component. It is quite obvious that the development of methods for fine control of Pt dispe rsion is necessary to study the fundamental relationships between the size \, state of the active component nanoparticles\, their detailed electronic structure\, and the actual properties of a catalyst in a chemical reactio n. As a rule\, various precursor solutions based on Pt(IV) and Pt(II) salt s are used for the synthesis of platinum catalysts\; after precipitation t o a carrier the system undergoes various heat treatments. The main factor affecting the dispersion of Pt forms existing in salt solutions is the ong oing hydrolysis process. To implement the research goals\, ~0.01-0.05 M aq ueous solutions of K2 PtCl4 and nitrate solutions of Pt (IV) with differen t ligand environments were prepared and EXAFS spectra (Pt-L3 edge) of stu died samples were recorded at SSTRC\, Novosibirsk. The composition and str uctures of the hydrolysis products being polynuclear platinum (II) hydroxo complexes (PHC-Pt) were studied. It was found that during the hydrolysis r eaction of [PtCl4]2-complexes\, oligomeric chains containing Pt-O-Pt fragm ents are formed\, in which neighboring Pt atoms are connected by a single O–bridge atom. Aging of solutions containing PHC-Pt for a long time\, by formation of 3D-oxide structures. does not take place\, in contrast to so lutions of PHC-Pd (II) and PHC-Pt (IV). Increase in size of PHC-Pt particl es is shown to take place while the process of oligomerization of Pt(II) m ononuclear complexes proceeds. It was shown that during hydrolysis of Pt(I V) nitrate solutions\, Pt(IV) polynuclear hydroxocomplexes were formed. It was established that the nearest environment of Pt in these solution is a lways octahedral\, with the distortion caused by replacing the O part with the N part. However\, formation and stabilization of various agglomerated Pt-containing forms of different nuclea are possible. It was found out th at the nuclearity of various forms and their resistance to hydrolysis depe nd on the preliminary history of the sample and the nature of O\, N-ligand s in the platinum coordination sphere platinum in the solutions. The Pt-O\ , N\, and Pt-Pt distances and corresponding coordination numbers are deter mined. Variants of possible structural models are considered. Additionally \, all prepared samples of solutions were examined by NMR\, TEM methods. D ata from all these methods agree with each other.\nThe work was carried ou t in the framework of the RFBR projects no. 19-05-50046\, 18-03-01251. The work was done at the shared research center SSTRC on the basis of the Nov osibirsk FEL/VEPP-4-VEPP-2000 complex at BINP SB RAS\, using equipment sup ported by project RFMEFI62119X0022.\n\nhttps://indico.inp.nsk.su/event/24/ contributions/1865/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1865/ END:VEVENT BEGIN:VEVENT SUMMARY:Focusing system of synchrotron radiation with refractive mosaic le nses for the station “Extreme state of matter” of the VEPP-4 DTSTART;VALUE=DATE-TIME:20200713T143000Z DTEND;VALUE=DATE-TIME:20200713T143100Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1862@indico.inp.nsk.su DESCRIPTION:Speakers: Alexandr Berdyugin (INP)\nThe purpose of the work is to create a system for focusing synchrotron radiation for the station “ Extreme state of matter” on a VEPP-4 [1]. For experiments at this statio n\, there is a problem of insufficient radiation intensity\, which worsens the statistics in fast processes experiments with an exposure time of dif fraction patterns of 100 ps [2\, 3\, 4\, 5\, 6]. This problem can be solve d through the use of refractive focusing optics made of a polymer (epoxy r esin SU-8). An x-ray mosaic lens was chosen for focusing [7]. The system m akes it possible to focus SR into a smaller spot by increasing the radiati on intensity and allowing realizing a local structural analysis. The follo wing tasks were solved:\n1) the mechanical precision parts of the detector alignment and fastening system are designed and manufactured\;\n2) a cont rol program for the adjustment device is designed\;\n3) a calculation was made of the heat absorption on the lens and its heating under monochromati c and polychromatic radiation using the ANSYS program\;\n4) the system is installed and debugged on the channel No. 8 VEPP-4\;\n5) an experiment was conducted to focus synchrotron radiation on a monochromatic beam.\nIn the experiment it was shown that the lens stably works on monochromatic radia tion\, but it heats up strongly (heating rate of 17 deg / s) on polychroma tic radiation. A scheme of the pulsed operation of the lens (active interv al of 100 ms) for the study of fast-flowing processes on polychromatic rad iation is proposed.\nThis work was supported by RFBR grant 19-29-12045 and Ministry of Science and Education of Russia grant AAAA-A17-117030310280-6 .\n\n1. Tolochko B.P\, Kosov A.V.\, Evdokov O.V.\, Zhogin I.L.\,Ten K.A.\, Pruuel E.R.\, Shekchtman L.I.\, Aulchenko V.M.\, Zhulanov V.V.\, Piminov P.F.\, Nazmov V.P.\, Zolotarev K.Vb \, Kulipanov G.N. The synchrotron rad iation beamline 8-b at VEPP-4 collider for SAXS\, WAXS and micro tomograph y investigation of fast processes at extreme condition of high temperature and pressure with nanosecond time resolution. Physics Procedia 84 ( 2016 ) 427 – 433\n2. Aulchenko\, V.M.\, Zhulanov\, V.V.\, Kulipanov \, G.N.\, Ten\, K.A.\, Tolochko\, B.P.\, Shekhtman\, L.I.Investigations of fast processes by X-ray diffraction methods at the Siberian Synchrotron a nd Terahertz Radiation Center(2018) Physics-Uspekhi\, 61 (6)\, pp. 515-530 . \n3. Pruuel\, E.R.\, Ten\, K.A.\, Tolochko\, B.P.\, Merzhievskii\, L.A.\ , Luk'Yanchikov\, L.A.\, Aul'Chenko\, V.M.\, Zhulanov\, V.V.\, Shekhtman\, L.I.\, Titov\, V.M. Implementation of the capability of synchrotron radia tion in a study of detonation processes(2013) Doklady Physics\, 58 (1)\, p p. 24-28. \n4. Arakcheev A.S.\, Aulchenko V.M.\, Balash I.I.\, Burdakov A. V.\, Chernyakin A.D.\, Dokutovich V.A.\, Evdokov O.V.\, Kasatov A.A.\, Kaz antsev S.R.\, Kosov A.V.\, Popov V.A.\, Sharafutdinov M.R.\, Shekhtman L.I .\, Shoshin A.A.\, Tolochko B.P.\, Vasilyev A.A.\, Vyacheslavov L.N.\, Vai gel L.A.\, Zhulanov V.V. Dynamic observation of X-ray Laue diffraction on single-crystal tungsten during pulsed heat load.\nJournal of Synchrotron R adiation. 2019. Vol. 26. P. \n5. Aulchenko V.\, Shekhtman L.\, Zhulanov V. \, Tolochko B.\, Pruuel E.\, Ten K. Development of the microstrip silicon detector for imaging of fast processes at a synchrotron radiation beam.\nN uclear Instruments and Methods in Physics Research. Section A: Accelerator s\, Spectrometers\, Detectors and Associated Equipment. 2017. Vol. 845. P. 169-172.\n6. Arakcheev A.\, Aulchenko V.\, Kudashkin D.\, Shekhtman L.\, Tolochko B.\, Zhulanov V. Development of a silicon microstrip detector wit h single photon sensitivity for fast dynamic diffraction experiments at a synchrotron radiation beam.\nJournal of Instrumentation. 2017. Vol. 12. P. C06002.\n7. Nazmov V.P.\, Tolochko B.P. Patent RF 2572045.\n\nhttps://ind ico.inp.nsk.su/event/24/contributions/1862/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1862/ END:VEVENT BEGIN:VEVENT SUMMARY:Silicon and Diamond Diffractive Lenses with Continuous Profile for Focusing High-Power Terahertz Radiation DTSTART;VALUE=DATE-TIME:20200714T112000Z DTEND;VALUE=DATE-TIME:20200714T114000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1863@indico.inp.nsk.su DESCRIPTION:Speakers: Maxim Komlenok (Prokhorov General Physics Institute of the Russian Academy of Sciences)\nAn increase in the radiation power of THz sources creates the need for the development of new optics operating with it. Here\, we propose and realize the fabrication of silicon and diam ond diffractive lenses with a continuous profile by the method of direct a nd indirect laser ablation\, respectively. The fabricated lenses were test ed with a free-electron laser at the wavelength of 141 µm and demonstrate d high diffraction efficiency and a good agreement with the theoretical pr ediction. The work was supported by RFBR grant 18-32-20226\n\nhttps://indi co.inp.nsk.su/event/24/contributions/1863/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1863/ END:VEVENT BEGIN:VEVENT SUMMARY:Method for polarization shaping at free-electron lasers DTSTART;VALUE=DATE-TIME:20200713T131500Z DTEND;VALUE=DATE-TIME:20200713T131600Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1815@indico.inp.nsk.su DESCRIPTION:Speakers: Andrei Trebushinin (Novosibirsk State University)\nX -ray free-electron lasers (FEL) deliver high-power\, ultra-short polarized X-ray pulses\, where the polarization state is determined by the electron beam trajectory in the FEL undulator. In this way\, the polarization stat e depends on the kind of a magnetic structure used\, and is fixed along th e entire pulse. However\, it would be beneficial to control the dependence of the polarization shape on time over the scale of one single pulse dura tion (about tens of femtoseconds). Such radiation may enable study of ultr afast molecular dynamics and magnetism.\nIn this contribution\, we discuss a new method to control the polarization state of a single FEL pulse long itudinally (in time) and/or transversely (spatially) on the scales of 100 femtoseconds and several micrometers respectively.\nWe propose to use a cr ossed-undulators setup consisting of a pair of two co-axial Apple-X undula tors. These undulators are scheduled for installation downstream the nomin al SASE3 undulator line of European XFEL and they may be tuned to emit rad iation pulses with two orthogonal polarization states\, e.g. linear (verti cal and horizontal) or circular (right and left). Both pulses upon reachin g the sample are overlapped both spatially and temporally with some phase difference. Their interference yields polarization states\, circular or li near respectively\, with orientation that depends on that phase difference . If the frequency of one of the pulses is detuned\, polarization of the r esulting radiation will be shaped temporally. If the distance between the undulator cells is considerable\, a difference between the wavefront curva tures allows shaping the resulting polarization spatially. We investigate possibilities to maximize or minimize both effects with a focusing system and demonstrate it with numerical simulations.\n\nhttps://indico.inp.nsk.s u/event/24/contributions/1815/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1815/ END:VEVENT BEGIN:VEVENT SUMMARY:Pulsed wire field measurements of 38-period superconducting undula tor prototype DTSTART;VALUE=DATE-TIME:20200713T131800Z DTEND;VALUE=DATE-TIME:20200713T131900Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1820@indico.inp.nsk.su DESCRIPTION:Speakers: Fedor Kazantsev (Novosibirsk State University)\nIn t his paper\, a pulsed wire method (PWM) for magnetic measurements was descr ibed. Experimental setup was developed and assembled. The results of measu rements on superconductive 38-pole 0.75 T undulator are given. Two differe nt wires were used – 200µm and 140 µm diameter. For 140µm the calibra tion curve was obtained\, wire position sensor has high sensitivity – 0. 28 V/µm. A dispersion correction algorithm was applied to the raw data fr om sensor and corrected signals were given. The results and further works are being discussed.\n\nhttps://indico.inp.nsk.su/event/24/contributions/1 820/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1820/ END:VEVENT BEGIN:VEVENT SUMMARY:XAFS study of zirconium oxides modified by yttrium and magnesium DTSTART;VALUE=DATE-TIME:20200713T141600Z DTEND;VALUE=DATE-TIME:20200713T141700Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1866@indico.inp.nsk.su DESCRIPTION:Speakers: Vladimir Kriventsov ()\nToday the mixed oxides with a fluorite structure of the composition (Zr\, Y) O2-x are widely used to h arden ferritic steels used as fuel element cladding materials for the new generation of fast neutron reactors operating under irradiation and high t emperatures. This work is devoted to study of the state and local structur e of samples of zirconium oxides modified by yttrium and magnesium\, prepa red by coprecipitation and calcined at a temperature of 1250 °C. XAFS (XA NES/EXAFS) spectra (Y-K\, Zr-K edges) of studied samples were recorded at SSTRC\, Novosibirsk. It was shown that from the yttrium side\, the XANES s pectra of both samples were almost identical. On the zirconium side\, the XANES spectra have minor differences. It can be assumed that the charge st ate and the nearest environment of yttrium also practically does not chang e depending on the composition of the samples. For zirconium\, with the ch arge state unchanged\, some changes in the nearest oxygen environment appe ar to occur due to the composition of the samples. It was found out that t he curves of the radial distribution of atoms (RDFs) obtained from the EXA FS spectra of the studied samples have a number of characteristic features . Only the first coordination spheres of the Me-O and Me-Me types are obse rved\, but long-range coordination spheres (more than ~0.45 nm) are practi cally absent\, which may indicate distortions of the long-range order in t he structures. The local yttrium arrangement is stable when the compositio n of the samples changes\, which may indicate the formation of clusters th at include only Y and O elements. The local zirconium arrangement depends on the composition of the samples\, since there are some differences in th e RDFs curves. Thus\, the amplitudes of the peaks assigned to the coordina tion spheres Zr-O and Zr-Me are significantly reduced (by more than 25%) f or the Y\,Mg- modified sample in comparison with those for the Y- modified sample\, which indicates distortions of the original fluorite structure. The observed changes in the Zr-O and Zr-Me distances (more than 0.05) are greater than the changes due to differences in the cell parameters for the compared samples. Using the model of statistical solid solution with a fl uorite structure\, it is suggested that the presence of Y-O clusters preve nts refinement of structures.\nThe work was carried out in the framework o f the RFBR project no. № 19-03-00530. The work was done at the shared re search center SSTRC on the basis of the Novosibirsk FEL/VEPP-4-VEPP-2000 c omplex at BINP SB RAS\, using equipment supported by project RFMEFI62119X0 022.\n\nhttps://indico.inp.nsk.su/event/24/contributions/1866/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1866/ END:VEVENT BEGIN:VEVENT SUMMARY:X-ray reflecto-interferometer based on compound refractive lenses for thin-films study DTSTART;VALUE=DATE-TIME:20200713T134400Z DTEND;VALUE=DATE-TIME:20200713T134500Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1878@indico.inp.nsk.su DESCRIPTION:Speakers: Maria Voevodina (Immanuel Kant Baltic Federal Univer sity)\nCompound refractive lenses (CRLs) have been widely used for more th an 20 years on leading synchrotrons and free-electron lasers for hard X-ra y beam transport\, collimation and focusing [1-2]. The combination of cohe rent compatible optics and new coherent sources increased opportunities fo r the development of new research methods.\nIn this abstract\, we demonstr ate a new X-ray interferometer based on compound refractive optics (CRL) f or thin-film structures study [3]. The idea of a reflecto-interferometer i s to use a very simplified experimental setup\, where a coherent monochrom atic X-ray beam\, focused by CRL\, impinges on a thin film at a grazing an gle. This converging fan of radiation incoming on a sample surface provide s a range of grazing angles. For each grazing angle\, the rays reflected f rom the front and rear boundaries of the film will interfere\, and as a re sult\, the diffracted intensity in the range of exit angles equal to the a ngular range of the incident fan will generate an interference pattern rep resenting fringes of equal inclination. The capabilities of the new reflec to-interferometer were demonstrated at the ESRF ID06 beamline using X-rays from 10 to 20 keV. The Si3N4 membranes of thicknesses in the range from 1 00 to 1000 nm were studied. Experimentally obtained reflecto-interferogram s correspond well with calculated ones\, and the distance between fringes correspond to the thickness of the tested membranes. While the interferenc e pattern in rather wide angular range is recorded in one shot\, the propo sed approach has a very good temporal resolution\, which is limited to a f ew milliseconds\, depending on the X-ray flux and the sensitivity of the d etector. The high spatial resolution of the interferometer was demonstrate d on interferograms recorded from an 8 nm-thick gold strip deposited on an Si3N4 membrane. It was shown that the interference pattern is very sensit ive even to small deviations in the thickness of the layer. \nIn addition\ , this reflecto-interferometer can be easily adapted for use with the Meta lJet Excillium micro-focus laboratory source\, which has GaKα emission li ne at 9.25 keV. As a result\, a series of interference patterns for test s ample - free-standing thin-film membrane thick of 500 um were observed.\nT he new X-ray reflecto-interferometer opens a wide range of opportunities f or the analysis of thin-film and multilayer systems. The recording of the interference pattern in a single shot allows a fast in-situ analysis of so lid and liquid materials including organic and biological films. The prop osed method has significant advantages compared to classical X-ray reflect ometry\, providing information on the thickness and density of layers or s tructures in real time which allows research with a fundamentally new spat ial and temporal resolution.\n\n1. A. Snigirev\, V. Kohn\, I. Snigireva et al. // Nature\, 384\, 49-51 (1996).\n2. Snigirev\, I. Snigireva // Spring er Series in Optical Sciences\, 137\, 255-285 (2008).\n3. Lyatun\, S.\, et al. Journal of synchrotron radiation 26.5 (2019).\n\nhttps://indico.inp.n sk.su/event/24/contributions/1878/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1878/ END:VEVENT BEGIN:VEVENT SUMMARY:Regularization approach for specific adverse events in processing elemental maps obtained using micro-XRF DTSTART;VALUE=DATE-TIME:20200713T140700Z DTEND;VALUE=DATE-TIME:20200713T140800Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1874@indico.inp.nsk.su DESCRIPTION:Speakers: Dmitry Sorokoletov ()\nMicro-XRF is a promising method to study elemental composition of samples and objects of v arious nature with spatial resolution of tens of microns to tens of nanometers [1]. Application of polycapillary optics for focusing an d (optionally) collecting enables conduction of studies on synchrot ron radiation (SR) sources of the second and higher generation\, the minimum possible spatial resolution limited to values of 10 to 25 microns (effective width of the focus of X-ray lenses\, depen ding on the energy of transmitted radiation) [1].\n\nAt a sufficient ly high signal-to-noise ratio and small scanning step\, one can attain subfocus resolution (i.e.\, its further reduction by a fact or of 2-3 [2]) via processing chemical element distribution maps using deconvolution methods [3]. However\, at operation on second generation SR sources\, this method is applicable for processing maps only for matrix and minor elements (with relative concentratio n of not less than one percent) [4].\n\nWe have developed a regu larization approach for situations with signal noise of medium gra de. This approach correctly takes into account a priori specific information and is aimed at identifying the most general properti es of composition and morphology in micro-areas less than 15 micr ons in size. It was tested and showed a good result for two c haracteristic cases of practical importance\, which arose in proces sing of a series of maps resulting from studies of geological and cosmic samples (e.x.\, [4-5] and so on) using micro-XRF.\n\nThe wo rk was carried out in the framework of the state assignment for Budker INP SB RAS and the RFBR projects no. 19-05-50046\, 18-03-01251 . The work was partly done at the shared research center SSTRC on the basis of the Novosibirsk FEL/VEPP-4-VEPP-2000 complex at BIN P SB RAS\, using equipment supported by project RFMEFI62119X0022.\n\ n[1] I. Mantouvalou\, W. Malzer et al. Spectrochemica Acta Part B. 77\, 2012\, 9-18 [2] D.S. Sorokoletov\, Ya.V. Rakshun\, E.P. Voytovic h et al. Physics Procedia. 84\, 2016\, 295-301\n[3] P. Wrobel\, M. Cz yzycki. Talanta. 113\, 2013\, 62-67\n[4] F.A. Darin\, Y.V. Rakshun\, D.S. Sorokoletov et al. Bulletin of the Russian Academy of Scien ces: Physics. 83\, 2019\, 1433-1436\n[5] F. Darin\, D. Sorokoletov\, Ya. Rakshun et el\, Journal of surface investigation: x-ray\, s ynchrotron and neutron techniques\, 12 (1)\, 2018\, 123-127\n\nhttps:// indico.inp.nsk.su/event/24/contributions/1874/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1874/ END:VEVENT BEGIN:VEVENT SUMMARY:XAFS study of stable bimetallic catalysts for selective hydrogenat ion of furfural DTSTART;VALUE=DATE-TIME:20200713T141800Z DTEND;VALUE=DATE-TIME:20200713T141900Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1870@indico.inp.nsk.su DESCRIPTION:Speakers: Vladimir Kriventsov ()\n1Kriventsov V.V.\, 1Volodin A.M.\, 1Novgorodov B.N.\, 1Zyuzin D.A.\, 1Aksenov D.G.\, 1Ivanov D.P.\, 2N ikolaev S. A.\, 3Chistyakov A.V.\n\n1Boreskov Institute of Catalysis SB RA S\, Lavrentiev Ave. 5\, Novosibirsk\, 630090\, Russia\n2Faculty of Chemist ry\, Moscow State University\, GSP-1\, 1-3 Leninskiye Gory\, Moscow 1\, 11 9991\, Russia\n3Topchiev Institute of Petrochemical Synthesis RAS\, Lenins ky Pr.\, 29\, Moscow\, 119991\, GSP-1\, Russia\n\n\nThe work was carried o ut in the framework of the RNF project no. № 18-73-10216\, RFBR projects no. 19-05-50046\, 18-03-01251. The work was done at the shared research c enter SSTRC on the basis of the Novosibirsk FEL/VEPP-4-VEPP-2000 complex a t BINP SB RAS\, using equipment supported by project RFMEFI62119X0022.\n\n https://indico.inp.nsk.su/event/24/contributions/1870/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1870/ END:VEVENT BEGIN:VEVENT SUMMARY:An attempt of the quantitative analysis of cyclical constituents i n structure of scanning microfluorescence signals from human hairs DTSTART;VALUE=DATE-TIME:20200713T132800Z DTEND;VALUE=DATE-TIME:20200713T132900Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1871@indico.inp.nsk.su DESCRIPTION:Speakers: Dmitry Sorokoletov ()\, Maria Chernetskaja (Busker I NP SB RAS)\nThe distribution of some chemical elements along human hairs i s proved to be an valuable indicator in a range of various cases. It may s erve in order to use in medicine\, toxicology\, criminalistics\, forensic\ , archaeologics\, and so on [1]. However at the present any systematical s tudies focusing to analysing these distribution with submillimetrical and tens micron spacial resolution do not exist. We took an attempt to describ e qualitatively as well as to test an possibility of the analyse in detail such distributions on the example of the limited sample (consisting of fr agments of 5 human hairs).\n Our work was partitioned by two parts: panora mical and quantitative. The first part allowed to identify three main type s of superposing legible pseudoperiodical cyclical components of elemental distribution for all studied hairs. The diapason of all crutial parameter s of needed scanning experiments that is optimal for applied equipment for ability to process the results (cycles and correlation] between elemental signals) by statictical methods with a good quality was also found. The e xistence of an amount of strong limitations of these parameters are fully explained by the specifics of using synchrotron radiation sources of secon d generation. We can assume that this obstacle results in the existence of some principal limits for ability to process a detail analysis of human h airs (those are also characteristic for any case of applying a similar equ ipment).\n In the second part of this work we selected a concrete distribu tion of fluorescent signal from the sulfur with sufficiently acceptable re lation «signal to noise». Two special mathematical methods of analysing time series were applied successfully for a detail analysis of the cyclica l part of the signal. The algorithm «Hilbert-Huang transformation (HHT) » [2] found 4 pseudoperiodical constituents\, the algorithm «Singular S pectrum Analysis (SSA)» [3] found 5 preudoperiodiс constituents. The sum of all found components is equal initial signal despite of a normally dis tributed stochastic noise with very good quality. The shapes of the cyclic al components differ from approximating cosines by 10-30 % in average (unt il 40-50 % for singular points) for different constituents. The small amou nt of determinated pseudoperiodical components may be explained by human m ethabolizm intraday cycles as well as the characteristic features [1] of t he hair structure.\n The scanning experiments were carried out at Synchrot ron and Terahertz Research (INP SB RAS\, Novosibirsk) and the Kurchatov Co mplex of Synchrotron-Neutron Research (KISI\, Moscow) using a confocal X-r ay microscope. The work was carried out in the framework of the RFBR proje cts no. 19-05-50046. The work was partly done at the shared research cente r SSTRC on the basis of the VEPP-4-VEPP-2000 complex at BINP SB RAS\, usin g equipment supported by project RFMEFI62119X0022.\n[1] Hair in Toxicology . An Important Bio-monitor. \nEdited by Desmond John Tobin. The Royal Soci ety of Chemistry 2005\n[2] https://www.mathworks.com/help/signal/ref/hht.h tml\n[3] https://www.gistatgroup.com/cat\n\nhttps://indico.inp.nsk.su/even t/24/contributions/1871/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1871/ END:VEVENT BEGIN:VEVENT SUMMARY:Self-aligned single exposure deep x-ray lithography DTSTART;VALUE=DATE-TIME:20200713T133300Z DTEND;VALUE=DATE-TIME:20200713T133400Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1045@indico.inp.nsk.su DESCRIPTION:Speakers: Vladimir Nazmov (Budker Institute of Nuclear Physics )\nMicrodevices are usually made up of several interacting components that can be assembled on the basis of 3-dimensional LIGA structures\, using va rious techniques to fulfill the required positioning accuracy - the so-cal led combined LIGA technology [1]. As a part of the LIGA technology\, deep X-ray lithography enables the formation of 3-D microstructures of signific ant size in each of the three dimensions\; however\, it is often possible to improve positioning accuracy by using self-alignment technique when pat terning with the use of X-ray mask\, as shown in [2]. In our work\, we con sider single-exposure with self-alignment technique for the creation of mi crodevices of technological material\, which can demonstrate new physical capabilities. \n \n[1] LIGA and Its Applications\, Ed.V. Saile\, U. Wal lrabe\, O. Tabata\, J G. Korvink\, 2008\, Wiley‐VCH Verlag\, Weinheim. \n \n[2] V.Nazmov\, E.Reznikova\, M.Boerner\, J.Mohr\, V.Saile\, A.Snigi rev\, I.Snigireva\, M.DiMichiel\, M.Drakopoulos\, R.Simon\, M.Grigoriev\, Refractive lenses fabricated by deep SR lithography and LIGA technology fo r X-ray energies from 1 keV to 1 MeV. AIP Conf. Proc.\, 705(2004)752-755.\ n\nhttps://indico.inp.nsk.su/event/24/contributions/1045/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1045/ END:VEVENT BEGIN:VEVENT SUMMARY:A range of intuitive discretization schemes to accelerate algorith ms for solving deconvolution problems without loss of accuracy DTSTART;VALUE=DATE-TIME:20200713T134100Z DTEND;VALUE=DATE-TIME:20200713T134200Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1873@indico.inp.nsk.su DESCRIPTION:Speakers: Dmitry Sorokoletov ()\nA discretized inverse prob lem of deconvolution with single- or multi-dimensional Gaussian fun ction as the apparatus function [1] is found in a number of op tical and spectroscopic applications. Because of its instability [1 \, p. 12\; 2\, p. 32-37]\, it is necessary to reduce it to som e regularized analogue [1\; 2\, p. 47]\, after which it can be solved by common methods for solving linear systems of equations or optimization.\n\nThe so-obtained result has a meaning of approxi mate solution\, signal noise influence filtered by certain superimpo sition of special restrictions\, either on the solution or on pa rameters of its search. The value of the key parameter of regula rization method applied [2\, p. 47]\, in turn\, should be selecte d according to known principles. Proper selection [1\, p. 55-61\; 2\, p. 66] of the key parameter reduces the signal noise contr ibution to the solution to the lowest possible level with maximum possible preservation of signal information and compliance of it s a priori set properties\, if any.\n\nDespite the uniqueness of r esult obtained by the chosen regularization method at specific imp lementations of signal noise and values of its key parameter\, t here remains the problem of competition of various regularized sol utions. It consists in the fact that selection of different regul arization methods\, their auxiliary parameters\, and implementation of signal noise can yield solutions that formally have comparable explanatory power\, but differ in their features. An effective w ay to overcome this is the use of global optimization methods a nd genetic algorithms. Application of these methods radically incre ases the time required for calculations\, and hence methods for further acceleration of solving the deconvolution problem\, if poss ible\, are in demand.\n\nWe have developed a number of techniques that may enable acceleration of solving discretized problems of d econvolution without significant loss of accuracy regardless of th e regularization method. We considered specific examples to show that application of alternative schemes for improving discre te approximation of deconvolution problem and reducing its dimensio nality (involving non-standard methods of interpolation and taking edge effects into account [1\, p. 35]\, as well as breaking th e separation problem into many equivalent subproblems) makes it po ssible to accelerate computing processes\, at least when obtain ing solutions of a certain class.\n\nThe work was carried out in the framework of the state assignment for Budker INP SB RAS and RFBR project no. 19-05-50046. The work was done at the shared research center SSTRC on the basis of the Novosibirsk FEL/VEPP-4- VEPP-2000 complex at BINP SB RAS\, using equipment supported by pr oject RFMEFI62119X0022.\n\n[1] Hansen P. C.\, Nagy J. G.\, O'Leary D. P. Deblurring Images\, Matrices\, Spectra\, and Filtering. SI AM\, Philadelphia\, 2006. 130 p.\n[2] Leonov A.S. Solving ill-posed inverse problems. Outline of the theory\, practical algori thms and demonstrations in Matlab (in Russian). 2nd ed. M.: "LIBROKOM " Book House\, 2012. 336 p.\n\nhttps://indico.inp.nsk.su/event/24/contri butions/1873/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1873/ END:VEVENT BEGIN:VEVENT SUMMARY:The first results of measuring XAFS spectra in the soft X-ray rang e at KOSMOS station DTSTART;VALUE=DATE-TIME:20200713T134200Z DTEND;VALUE=DATE-TIME:20200713T134300Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1875@indico.inp.nsk.su DESCRIPTION:Speakers: Anton Nikolenko (Budker INP SB RAS)\, Mikhail Syrokv ashin (NIIC SB RAS)\nXAFS spectra were measured near the K edges of the ab sorption of phosphorus\, sulfur\, and L III absorption edges of molybdenum and niobium (2100 - 2700 eV). The measurements were carried out using an upgraded Si (111) dual-crystal monochromator in normal incidence geometry. The monochromator device is described. The main difficulties arising in t he course of obtaining spectra are discussed. It is shown that the spectra l resolution of the monochromator allows one to obtain XAFS spectra\, the quality of which is sufficient to decipher the structure of the sample. Th e measurement was carried out with a partial funding from the Russian Scie nce Foundation (project No. 18-03-01061).\n\nhttps://indico.inp.nsk.su/eve nt/24/contributions/1875/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1875/ END:VEVENT BEGIN:VEVENT SUMMARY:Characteristic of the BiTeCl electronic structure by resonant phot oemission DTSTART;VALUE=DATE-TIME:20200713T142000Z DTEND;VALUE=DATE-TIME:20200713T142100Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1880@indico.inp.nsk.su DESCRIPTION:Speakers: Yulia Khatchenko (M.N. Miheev Institute of Metal Phy sics of UB RAS\, 18 S. Kovalevskaya Str.\, Ekaterinburg\, 620108\, Russia) \nThe aim of this work is an experimental study of the electronic interact ion in the BiTeCl compound and its effect on the formation of the electron ic structure. The used method of resonant x-ray photoemission spectroscopy (RPES) allows distinguishing the contributions of the various components to the valence bands. We can study not only the ground state\, but also th e characteristics of excited two-particle states\, the reaction to externa l action\, and the relaxation processes of the electronic system. \nBiTeCl has a hexagonal crystal structure of alternating layers of chlorine\, bis muth and tellurium atoms. The crystal has no inversion symmetry due to the continuous stacking order of the three atomic layers. The weak bonding be tween the Te and Cl layer provides a natural cleaving plane in the (0001) plane. The BiTeCl crystal was grown based on BiCl3–Bi2Te3. The telluride compound was obtained by fusing stoichiometric amounts of elemental Bi an d Te at 600 ◦C. BiCl3 was prepared by the evaporation of a saturated sol ution of Bi2O3 in HCl acid. The charge was then sealed in a growth quartz ampoule under a pressure of 10−3 Torr. After heating to 430 ◦C at a ra te of 20 ◦C h−1 followed by 1 day of soaking at this temperature the m elt was crystallized by a modified Bridgman method [1]. According to our x -ray diffraction analysis a major part of the aggregate consisted of the B iTeCl phase\, which was selected for the RPES measurements.\nThe experimen ts were carried out at the Russian–German laboratory of the BESSY II syn chrotron (Berlin). The RPES spectra were obtained using synchrotron radiat ion with 150–900 eV photon energy range. The energy resolution was 0.1 e V. The perfect working surface was prepared by cleaving the samples direct ly in the ultrahigh vacuum chamber of the spectrometer. The main regularit ies that appear when the excitation energy and the photoionization cross-s ection change were established.\n\n\n\nThe reported study was funded by RF BR\, project number 19-29-12061 and was carried out within the state assig nment of Ministry of Science and Higher Education of the Russian Federatio n (theme “Spin” No. АААА-А18-118020290104-2 and АААА-А19-119 081990020-8).\n\nhttps://indico.inp.nsk.su/event/24/contributions/1880/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1880/ END:VEVENT BEGIN:VEVENT SUMMARY:Beam-shaping refractive optics for coherent X-ray sources DTSTART;VALUE=DATE-TIME:20200715T084000Z DTEND;VALUE=DATE-TIME:20200715T090000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1881@indico.inp.nsk.su DESCRIPTION:Speakers: Dmitry Zverev (Immanuel Kant Baltic Federal Universi ty)\nThe most advanced X-ray sources\, such as third-generation synchrotro ns and free electron lasers (XFEL)\, are capable to generate high brightne ss coherent radiation\, especially in the hard X-ray region. The availabil ity of such beams facilitates the development of a new generation of X-ray optics\, whose optical properties allow going far beyond simple collimati on and focusing functions. This optics makes it possible to form amplitude and phase of wave front with almost complete freedom\, using the most out standing properties of synchrotron and X-ray laser radiation such as brigh tness\, monochromaticity\, and coherence.\nLike in visible light optics\, beam-shaping functions can be implemented in an X-ray regime based on both diffraction and refractive optical elements. For example\, the beam-shapi ng optics based on diffraction optical elements (DOEs) allows realizing al most any complex optical transformation. However\, due to the high penetra ting power of X-rays through DOEs their use is significantly limited in th e hard energy range. In addition\, since many unknown beam parameters must be defined in advance\, the design of such beam-shaping optical elements is a challenging task. As for the beam-shaping elements based on refractiv e optics [1]\, they are deprived of the disadvantages which are inherent i n DOEs. This optics allows for some beam transformations\, and the possibi lities of its applications cover various areas of modern X-ray optics\, su ch as interferometry and coherent diffraction\, phase-contrast microscopy and imaging\, and ultrafast and nonlinear optics studies.\nFor example\, o ne of the most vibrant demonstrations of the beam-shaping optics is a spec ial class of refractive optical elements that have axial symmetry and are capable to convert a point-like source to a narrow axial straight line seg ment. These optical elements are called axicons. Recently\, we demonstrate d an X-ray parabolic refractive axicon lens as a novel type of X-ray beam- shaping element [2]. Under coherent X-ray illumination\, the parabolic axi con generates Bessel-like beam propagated along the optical axis in the ne ar field and ring-shaped beam in the far field.\nThe optical transformatio ns produced by axicon can be used in areas requiring special illumination\ , as well as extended focused beams\, for instance\, in diffraction and im aging techniques\, in metrological applications\, as well as for source di agnostics and beamline alignment. Moreover\, such beam-shaping capabilitie s can significantly simplify some existing experimental layouts or lead to completely new optical schemes for X-ray techniques based on synchrotron and XFEL sources. Most recently\, we proposed an optical scheme of phase-c ontrast microscopy technique based on the axicon optics [3]. Due to the un ique optical properties of the parabolic refractive axicon lens\, the new approach turned out to be more efficient for visualization of weakly absor bing samples as compared with the traditional microscopy technique.\nIn ad dition to new X-ray axicon refractive optics\, it is also worthwhile to co nsider other beam-shaping elements\, called interferometers\, whose optica l functions are well known and successfully used. These devices allow real izing the paraxial optical schemes of interferometry based on the coherent properties of modern X-ray sources. Recently\, we demonstrated bilens and multilens interferometers based on refractive optics which under coherent illumination generate an array of mutually coherent beams focused at some distance [4-5]. The size of the focal spots is restricted to the diffract ion limit and can be less than tens of nanometers. When the beams overlap they produce a steady interference pattern of fringes in the far field.\nT he proposed interferometers can be used in a wide X-ray energy range while maintaining high efficiency. The field of applications of their optical f unctions is not limited only to the interferometry techniques and can be e xtended in the area of beam diagnostics and beam conditioning. Moreover\, such lens systems open up new opportunities for the development of phase-c ontrast imaging technique\, which was recently demonstrated [6].\n\n[1] Sn igirev\, A.\, Kohn\, V.\, Snigireva\, I.\, & Lengeler\, B. (1996). A compo und refractive lens for focusing high-energy X-rays. Nature\, 384(6604)\, 49-51.\n[2] Zverev\, D.\, Barannikov\, A.\, Snigireva\, I.\, & Snigirev\, A. (2017). X-ray refractive parabolic axicon lens. Optics Express\, 25(23) \, 28469-28477.\n[3] Zverev\, D.\, Snigireva\, I.\, & Snigirev\, A. (2018) . X-ray Phase Contrast Microscopy Based on Parabolic Refractive Axicon Len s. Microscopy and Microanalysis\, 24(S2)\, 296-297.\n[4] Snigirev\, A.\, S nigireva\, I.\, Kohn\, V.\, Yunkin\, V.\, Kuznetsov\, S.\, Grigoriev\, M. B.\, ... & Detlefs\, C. (2009). X-ray nanointerferometer based on Si refra ctive bilenses. Physical review letters\, 103(6)\, 064801.\n[5] Snigirev\, A.\, Snigireva\, I.\, Lyubomirskiy\, M.\, Kohn\, V.\, Yunkin\, V.\, & Kuz netsov\, S. (2014). X-ray multilens interferometer based on Si refractive lenses. Optics express\, 22(21)\, 25842-25852.\n[6] Zverev D.\, Snigireva I.\, Kohn V.\, Kuznetsov S.\, Yunkin V.\, Snigirev A.\, (2020) X-ray phase -sensitive imaging using a bilens interferometer based on refractive optic s. Accepted for publication in journal Opt. Express\n\nhttps://indico.inp. nsk.su/event/24/contributions/1881/ LOCATION: Zoom 890 9721 5207 URL:https://indico.inp.nsk.su/event/24/contributions/1881/ END:VEVENT BEGIN:VEVENT SUMMARY:Metrological approach for diagnostics of x-ray refractive lenses DTSTART;VALUE=DATE-TIME:20200715T094000Z DTEND;VALUE=DATE-TIME:20200715T100000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1883@indico.inp.nsk.su DESCRIPTION:Speakers: Anton Narikovich (IKBFU)\nOptical systems based on c ompound refractive lenses (CRLs) with rotationally parabolic profile [1] a re amongst the most advanced optical components at the novel synchrotrons worldwide [2]. Methods and technologies of their production one of the mos t rapidly progressing areas of modern synchrotron instrumentation techniqu es. Manufacturing of CRLs is closely related to the analysis of technologi cal errors affecting on quality of their optical characteristics. The most important problem is the geometric deviations of the CRL refractive profi le from the calculated shape [3]. Therefore\, in addition to the improveme nt of lens manufacturing methods\, the development of metrological diagnos tic methods which provide accurate measurements of the geometric character istics of the parabolic profile of the CRL are also required.\nThis work p resents a comparison of various methods of metrological studies of profile s of X-ray refractive lenses. Application of the regression analysis allow s to assess the adequacy of the of proposed model of geometrical descripti on of the lens profile and coaxial alignment of the refracting surfaces wh ich determine the quality of the optical system for x-ray imaging. The dev eloped a comprehensive laboratory metrological approach allows controlling the quality of the profile shape of refractive lenses and thus significan tly improve their quality characterization\, by a proper adjustment of the CRL production process. \n\n[1] Kohn\, V.\, Snigireva\, I. & Snigirev\, A . Opt. Commun. (2003) 216\, 247–260\n[2] A. Snigirev\, I. Snigireva\, “Hard X-ray Microoptics”\, Springer Series in Optical Sciences vol. 13 7\, 255-285\, 2008.\n[3] A. Snigirev\, V. Kohn\, I. Snigireva and etc.\, " Focusing High-Energy X Rays by Compound Refractive Lenses\," Appl. Opt. 37 \, 653-662 (1998)\n\nhttps://indico.inp.nsk.su/event/24/contributions/1883 / LOCATION: Zoom 890 9721 5207 URL:https://indico.inp.nsk.su/event/24/contributions/1883/ END:VEVENT BEGIN:VEVENT SUMMARY:Test results of the 7 T superconducting solenoid for THz laser spe ctroscopy DTSTART;VALUE=DATE-TIME:20200713T135300Z DTEND;VALUE=DATE-TIME:20200713T135400Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1791@indico.inp.nsk.su DESCRIPTION:Speakers: Alexey Bragin (Budker Institute of Nuclear Physics)\ nThis project is related to new spectroscopy method in less researched THz range. The method is founded on using of a free electron laser with high spectral power radiation which can be smoothly tuned in desirable range of spectrum. The objects of research of this method are fast processes in ph ysics\, chemical and biological reactions. Uniform magnetic field of 6 T v alue in the research area can considerably increase possibilities of this method. The magnetic field will modulate free induction decay (FID) radiat ion of molecules on characteristic frequencies of the Zeeman splitting tha t gives more possibilities of identification of molecules having even weak magnetic momentum. Moreover\, the use of magnetic field allows essentiall y increase sensitivity of this method due to almost complete polarized sep aration of weak measuring FID signals from powerful radiation of the laser .\nThe operational characteristics of the superconducting solenoid providi ng the field up to 7 T will be presented. The magnetic field measurements results will be discussed.\n\nhttps://indico.inp.nsk.su/event/24/contribut ions/1791/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1791/ END:VEVENT BEGIN:VEVENT SUMMARY:Mathematical modeling of thermal loads of x-ray adaptive optics m aterials DTSTART;VALUE=DATE-TIME:20200713T143200Z DTEND;VALUE=DATE-TIME:20200713T143300Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1884@indico.inp.nsk.su DESCRIPTION:Speakers: Maksim Korobenkov (Immanuel Kant Baltic Federal Univ ersity)\nThe paper presents the results of a study of the thermal loads of materials used in the production of x-ray optics. The development of new types of x-ray studies and the transition to the fourth generation of sync hrotron radiation sources\, which is realized by reducing the emittance of undulator sections\, requires advanced studies of the thermal stability o f the first components of the optical line of the beam. An increase in the radiation power density is a critical problem for the design of the optic al elements of the undulator section\; this is especially important for cr ystalline monochromators with relatively high angles of incidence. However \, other optical elements — windows\, lenses\, slits\, and zoom — are exposed to thermal loads. Therefore\, it is important to consider the effe ct of thermal loads on materials of adaptive x-ray optics to predict not o nly cooling modes\, but also thermal deformations. To this end\, studies h ave been conducted on the interaction of X-rays with the main materials us ed in the production of X-ray optics - aluminum\, beryllium\, diamond and UHMW (ultra high molecular weight polyethylene).\nThe occurrence of therma l gradients occurs due to the absorption of X-rays by the surface of the m aterial (radiant heat transfer) and volume absorption (according to the Bu rer-Lambert law). The problem was solved numerically by the finite element method in the ANSYS Workbench software package. In the framework of the t ask\, the heat flux arising from the interaction of X-ray radiation with t he surface of the substance was set as the boundary condition of heat tran sfer of the second kind. The shape of the heat spot was chosen in the form of a circle with a Gaussian character distribution of the density of ther mal radiation. The interaction of X-rays with a plate of finite size and t hickness was considered. As part of the problem statement\, 3 loading mode s with a characteristic X-ray wavelength were selected: 1\, 0.5\, and 0.25 angstroms.\nThe results of the calculations showed that the use of UHMW a s a material for x-ray optics requires a very careful selection of operati ng modes\, preference should be given to modes with a very low power densi ty of the radiation load. The main heat load is associated with the surfac e absorption capacity of the material\, combined with low thermal conducti vity\, leading to the appearance of a surface heat source that can literal ly burn through the material.\nThe best calculated thermal stability resul ts were shown by diamond plates. In addition to excellent thermal conducti vity\, diamond has a low coefficient of volume attenuation of intensity\, leading to low temperature gradients of the established temperature regime .\n\nhttps://indico.inp.nsk.su/event/24/contributions/1884/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1884/ END:VEVENT BEGIN:VEVENT SUMMARY:Experimental implementation of X-ray powder diffraction by polychr omatic synchrotron radiation in the range of 20-30 keV DTSTART;VALUE=DATE-TIME:20200713T143300Z DTEND;VALUE=DATE-TIME:20200713T143400Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1885@indico.inp.nsk.su DESCRIPTION:Speakers: Boris Tolochko (Institute of solid state chemistry a nd mechanochemistry)\nThe aim of the work is to develop a method that allo ws X-ray phase analysis using a wide synchrotron radiation (SR) spectral b and (polychromatic radiation). This will make it possible to increase the number of photons in the primary beam by 2-3 orders of magnitude and\, acc ordingly\, reduce the time for determining the composition of the sample t o nanoseconds.\n\nThe relationship between the angular dependence of the s cattering intensity of polychromatic radiation and the angular dependence of the scattering intensity of monochromatic radiation by an object is des cribed by the Fredholm equation of the first kind and is an incorrect task . The solution of this equation in the case of significant experimental er rors (which is inevitable in experiments with extremely high time resoluti on) is quite problematic.\nThe idea of the method is to form a sharp short -wavelength boundary in the SR spectrum and approximate the X-ray diffract ion pattern from the polycrystalline sample by the sum of Gaussian peaks\, which allows one to determine the intensities and interplanar distances f rom polychromatic X-ray diffraction patterns using the procedure of minimi zation by peak parameters. Computer model experiments showed that in this case\, the initial values of the peak parameters to minimize are determine d with sufficient accuracy for a successful procedure\, and the errors in determining the interplanar distances and their corresponding intensities are equal in order of magnitude to the errors associated with traditional experiments.\nThe purpose of this work is the experimental implementation of the proposed method\, debugging it on test samples and using fast proce sses to study.\nThe work is aimed at methodological support of the fundame ntal task - obtaining previously inaccessible information about the atomic structure of matter during fast processes (explosion\, solid-phase reacti ons). The results obtained will allow us to determine such process paramet ers as pressure\, temperature\, density and phase composition in the local region (several microns)\, as well as the dynamics of their changes in re al objects.\nTo date\, obtaining direct structural information about the s tate of a substance during fast-moving processes and the dynamics of its c hange has been impossible. This hindered the development of the theory of fast-flowing chemical reactions and processes occurring in matter during t he passage of the front of shock and detonation waves. The use of polychro matic synchrotron radiation (SR) opens up new possibilities and will allow to obtain previously inaccessible information on the kinetics of phase fo rmation in explosion products after passing through a detonation wave.\nSy nchrotron radiation\, as a source of x-ray radiation\, has a number of uni que properties\, the main of which are a large flux intensity\, which allo ws the use of a very short exposure time (\n\nhttps://indico.inp.nsk.su/ev ent/24/contributions/1885/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1885/ END:VEVENT BEGIN:VEVENT SUMMARY:Investigation of the chemical composition of bottom sediments Beri ng Sea DTSTART;VALUE=DATE-TIME:20200713T140000Z DTEND;VALUE=DATE-TIME:20200713T140100Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1802@indico.inp.nsk.su DESCRIPTION:Speakers: Ivan Kirichenko (IGM SB RAS)\nThe chemical compositi on of the bottom sediments of Bering Sea (north-west of the Pacific) was m easured by method of X-ray fluorescence analysis using synchrotron radiati on (SRXRF) at the collective station\, VEPP 3 (Institute of Nuclear Physic s\, SB RAS). Column length is 560 cm. The study of the chemical compositio n of this column is a continuation of large-scale work aimed at studying t he climate of the North Pacific.\nThe aim of the work is to construct seve ral climate change schemes for the Bering Sea and the subarctic of the Pac ific for the characteristic time slices of the last two glacier-ice cycles : the maximum of the last glaciation\, the Marine Isotope Stage 4 (MIS 4)\ , the maximum of the last interglacial glaciation (MIS 5.5)\, the maximum of the penultimate glaciation (Heinrich event 11\, MIS 6.2) and the warmes t possible MIS 6.5. The general characteristic patterns of orbital and mil lennial environmental\, climate and ventilation changes in the Bering Sea and the Pacific subarctic that have occurred during global climate change over the last two glaciation-ice cycles (190-0 thousand years ago) will be established. Analysis of mutual influence of environment and climate para meters between the subarctic of the Pacific Ocean and the Bering Sea over the last 190 thousand years.\nThe experiment is aimed at studying the dist ribution of chemical elements\, markers of paleoclimatic changes along the core of bottom sediments in order to identify orbital and rapid climate c hanges in the last two cycles of glaciation-icing. And also to clarify the role of the region in changes in the palaeoceanology of the world's ocean s and in the interaction of water and atmosphere that had occurred during orbital and millennial climate changes.\nAs part of the work were obtained distributions of chemical elements (from K to Mo for K-series and U\, Th\ , Pb for L-series) along the column under study in 1 cm steps. The conduct ed cluster analysis showed the presence of two large groups of elements. T he first one reflects the terrigenous component of the sediment (K\, Rb\, Nb\, Th\, Y\, Zr\, Mo\, Ti\, Fe\, etc.) and the second - biogenic (Ca\, Sr \, U\, Ge\, As\, Br). In the Fourier and wavelet spectra of the distributi on of the chemical elements were found periodically components comparable with periods of D-O events.\nThis work was supported of the grant "Intera ction of orbital and millennial changes in the environment and hydrology o f the Bering Sea and Sub-Arctic\, Pacific Ocean for the last two cycles of glaciation and glaciation under global climate variations" № 19-05-0066 3\n\nhttps://indico.inp.nsk.su/event/24/contributions/1802/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1802/ END:VEVENT BEGIN:VEVENT SUMMARY:In situ XRD study of the reduction of mixed Mn-Co oxide DTSTART;VALUE=DATE-TIME:20200714T125000Z DTEND;VALUE=DATE-TIME:20200714T131000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1887@indico.inp.nsk.su DESCRIPTION:Speakers: Olga Bulavchenko (Boreskov Institute of Catalysis)\n The reducibility of oxides is an essential characteristic of catalyst of d ifferent reactions. First of all\, it is important for oxidation reactions following the Mars-van Krevelen mechanism. In this mechanism\, a weakly b ound surface oxygen atom is added to forming the oxygenated compound\, lea ving behind an oxygen vacancy on the surface. Then\, the molecular oxygen react with the surface\, dissociate and refill the vacancy. In this case\, reducibility of oxide catalyst measures the tendency of oxide to lose oxy gen or to donate it to an adsorbed species. Secondly\, reduction can be an activation stage of Fischer-Tropsch synthesis\, stream reforming and wate r-gas shift reaction. The catalysts activation leads to transformation fro m oxide state to metallic\, depending on the reductive conditions the stat e of active sites can be changed significantly. Mn-containing oxides can e ffectively catalyze the oxidation of hydrocarbons\, CO and chlorcarbons. C ooperative utilize of Mn and another oxide leads to synergetic effect – increase in catalytic activity as compared with simple oxides. In double m etal oxide catalysts\, the formation of mixed oxides is possible. The purp ose of this work was to elucidate influence of redox properties of solid s olutions on the catalytic performance. A series of catalysts based on mixe d Mn-Co oxides with different molar ratios of cations have been prepared b y coprecipitation. Reduction mechanism of Mn-containing catalysts with hyd rogen was studied by a TPR-H2\, in situ XRD\, and in situ XPS\, XANES. It was shown that the mechanism of reduction of Mn-Co oxides with hydrogen di ffers significantly from the processes occurring on simple oxides. The red uction of Mn-Co oxides occurs in two steps: (Mn\,Co)3O4 transforms to (Mn\ ,Co)O solid solutions\, then the reduction of solid solutions (Mn\,Co)O to metallic cobalt Co and MnO proceeds. Correlations between the redox prope rties and the catalytic activity in the CO oxidation reaction have been fo und.\nAcknowledgement. The reported study was funded by RFBR according to the research project № 18-33-00542 and the framework of the budget proje ct for Boreskov Institute of Catalysis.\n\nhttps://indico.inp.nsk.su/event /24/contributions/1887/ LOCATION: Zoom 890 9721 5207 URL:https://indico.inp.nsk.su/event/24/contributions/1887/ END:VEVENT BEGIN:VEVENT SUMMARY:Dependence of the spectral and luminescent properties of polymethy l methacrylate on its molecular weight DTSTART;VALUE=DATE-TIME:20200715T072000Z DTEND;VALUE=DATE-TIME:20200715T074000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1888@indico.inp.nsk.su DESCRIPTION:Speakers: G.A. Lyubas (ISSCM SB RAS)\nA line of polymethylmeth acrylate (PMMA) samples was synthesized using synchrotron radiation of the VEPP-3 accelerator and the high-energy electron beam of the ILU-6 acceler ator. The study was carried out during the in situ synthesis of PMMA in th e recording of luminescence spectra and their kinetics. An experimental st udy was also made of the luminescence of PMMA samples with a molecular wei ght in the range 0.2 · 10^6 - 6 · 10^6 under excitation by an SR beam in the range of 3 - 60 keV. It was found that with an increase in the molecu lar weight of PMMA\, the maximum of the luminescence band of PMMA shifts t oward the long-wavelength direction (redshift)\, and the luminescence deca y time decreases. An increase in the luminescence bandwidth with increasin g molecular weight is also observed. These effects are explained by the or dering of the polymer structure and increase in density\, which leads to a decrease in interatomic distances and\, consequently\, to a shift in elec tronic levels and a change in their width.\nThis work was supported by RFB R grants 19-29-12045\, 16-29-01050\, 14-03-00770 and the Ministry of Scien ce and Education of Russia grant AAAA-A17-117030310280-6.\n\nhttps://indic o.inp.nsk.su/event/24/contributions/1888/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1888/ END:VEVENT BEGIN:VEVENT SUMMARY:Discovery of the scale effect of the dependence of the mass of sol id detonation products on the mass of explosives in "in situ" explosive ex periments on synchrotron beams VEPP-4 DTSTART;VALUE=DATE-TIME:20200713T143500Z DTEND;VALUE=DATE-TIME:20200713T143600Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1891@indico.inp.nsk.su DESCRIPTION:Speakers: Ivan Rubtsov (Lavrentyev Institute of Hydrodynamics of the Siberian Branch of the Russian Academy of Sciences)\nA unique insta llation\, the only one in the world\, was commissioned - an experimental s ynchrotron radiation station at the VEPP-4 accelerator complex: “Investi gation of the extreme state of matter” [1]. According to the characteris tics of the conducted experiments\, the station has no analogues in the wo rld. The new station made it possible to obtain unique in situ data on the dynamics of the formation of detonation products of large explosive charg es (up to 200 grams) of TNT - RDX.\nThe investigated explosive charges wer e cast TG samples (𝜌 ≈1.7 g / cm3) with a diameter of 20\, 30\, 40 an d a length of 55 mm. Initiation was carried out by the EDV-1 electric deto nator through a plane wave generator (20 mm in diameter) and an intermedia te charge of P-84 with a length of 5 mm and a corresponding diameter. Afte r the electric detonator\, a contact sensor was installed to stop the reco rding of the detector.\nThe experimental data obtained in this work are al ready used to take into account the carbon condensation energy behind the chemical reaction zone during detonation of TG charges. They are also impo rtant for constructing physical models of detonation and testing early mod els of the development of detonation processes.\nIn these experiments\, a scale effect was discovered - a nonlinear dependence of the mass of solid detonation products on the mass of explosives. At small charges (10 -50 gr ams)\, the amount of solid detonation products linearly depends on the ini tial explosive mass. With large masses of 50 - 150 grams\, a deviation fro m the linear dependence is observed. This is a large-scale effect - a devi ation from linear dependence.\nThis work was supported by RFBR grants 19-2 9-12045\, 16-29-01050\, 14-03-00770 and Ministry of Science and Education of Russia grant АААА-А17-117030310280-6.\n\n1. Tolochko\, B.P.\, Koso v\, A.V.\, Evdokov\, O.V.\, Zhogin\, I.L.\, Ten\, K.A.\, Pruuel\, E.R.\, S hekchtman\, L.I.\, Aulchenko\, V.M.\, Zhulanov\, V.V.\, Piminov\, P.F.\, N azmov\, V.P.\, Zolotarev\, K.V.\, Kulipanov\, G.N. The Synchrotron Radiati on Beamline 8-b at VEPP-4 Collider for SAXS\, WAXS and Micro Tomography In vestigation of Fast Processes at Extreme Condition of High Temperature and Pressure with Nanosecond Time Resolution (2016) Physics Procedia\, 84\, p p. 427-433. \n2. Shekhtman\, L.\, Aulchenko\, V.\, Kudashkin\, D.\, Kudrya vtsev\, V.\, Pruuel\, E.\, Ten\, K.\, Tolochko\, B.\, Zhulanov\, V. Operat ion of a silicon microstrip detector prototype for ultra-fast imaging at a synchrotron radiation beam. (2020) Nuclear Instruments and Methods in Phy sics Research\, Section A: Accelerators\, Spectrometers\, Detectors and As sociated Equipment\, 958\, № 162655. \n3. Rubtsov\, I.A.\, Ten\, K.A.\, Pruuel\, E.R.\, Kashkarov\, A.O.\, Kremenko\, S.I.\, Voronin\, M.S.\, Shek htman\, L.I.\, Zhulanov\, V.V.\, Tolochko\, B.P.Methods to restore the dyn amics of carbon condensation during the detonation of high explosives (201 9) Journal of Physics: Conference Series\, 1147 (1)\, № 012038.\n\nhttps ://indico.inp.nsk.su/event/24/contributions/1891/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1891/ END:VEVENT BEGIN:VEVENT SUMMARY:Development of photon diagnostic methods for synchrotron radiatio n sources DTSTART;VALUE=DATE-TIME:20200713T134500Z DTEND;VALUE=DATE-TIME:20200713T134600Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1890@indico.inp.nsk.su DESCRIPTION:Speakers: Artem Khegay (BFU)\nSynchrotron radiation is the uni que electromagnetic radiation\, allowing the detailed study of the interna l structure of materials using various non-destructive methods. As is know n\, such radiation is characterized by exceptional brightness and coherenc e\, due to the choice of a specific wavelength or energy\, synchrotron lig ht is used in many diffraction methods [1]. \nExisting technology in parti cle accelerators led to the ultimate characteristics of the synchrotron ra diation source. Further improvement of the storage ring\, namely an increa sing the electron density and an increasing the brightness of light\, beco mes difficult [2]. Today\, 4th generation synchrotron sources considered d iffraction-limited\, since such sources have an electron beam emittance le ss than a photon beam emittance [3]. The transition to synchrotron sources with an ultra-small electron beam opens up new prospects in X-ray diffrac tion methods and coherent imaging. However\, the determination of extremel y small source parameters (for example «SKIF» [4])\, requires a special approach and tools. Therefore\, the diagnosis of such sources becomes an i mportant task.\nThe interest in the diagnosis of synchrotron sources is be cause this tool allows you to accurately determine the parameters of the g enerated X-ray beam. We present a source imaging experiment carried out wi th different detection methods at the ESRF beamline. Photon beam diagnosti cs of a synchrotron radiation source can be divided into two directions: t he direct source imaging method and the interferometric approach. The dire ct imaging method allows you to get an enlarged image of the source using Compound Refractive Lens (CRL) [5-6]\, Fresnel zone plate (FZP) [7]\, or p inhole camera [8]. The use of interference methods gives a complete image of the phase structure of the photon beam. The proposed diagnostic methods are applicable both for the 3rd generation of synchrotron sources and for the 4th generation.\nThis research was supported by the Russian Science F oundation (Project No. 19-72-30009).\n\nReferences: \n[1] Als-Nielsen J.\, McMorrow D. Elements of modern X-ray physics. – John Wiley & Sons\, 201 1. \n[2] P. Elleaume\, et al.\, “Measuring Beam Sizes and Ultra-Small El ectron Emittances Using an X-ray Pinhole Camera” J. Synchrotron Rad. 2 ( 1995) 209.\n[3] Ewald\, F.\, et al. "Vertical emittance measurement at the ESRF." MOPD61\, DIPAC 11 (2011).\n[4] V. Korchuganov\, M. Blokhov\, M. Ko valchuk\, et al.\, Nucl. Instrum. Methods. Phys. Res. A543\, 14 (2005).\n[ 5] Snigirev A. et al. A compound refractive lens for focusing high-energy X-rays //Nature. – 1996. – Т. 384. – №. 6604. – С. 49.\n[6] Ku hlmann M. Hard x-ray microanalysis with parabolic refractive lenses : Bibl iothek der RWTH Aachen\, 2004.\n[7] Snigireva I. et al. Stacked Fresnel Zo ne Plates for High Energy X‐rays //AIP Conference Proceedings. – AIP\, 2007. – Т. 879. – №. 1. – С. 998-1001.\n[8] Thomas C. et al. X- ray pinhole camera resolution and emittance measurement //Physical Review Special Topics-Accelerators and Beams. – 2010. – Т. 13. – №. 2. – С. 022805.\n\nhttps://indico.inp.nsk.su/event/24/contributions/1890/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1890/ END:VEVENT BEGIN:VEVENT SUMMARY:Development of an approach to minimize the effects of x-ray glitch es DTSTART;VALUE=DATE-TIME:20200713T134600Z DTEND;VALUE=DATE-TIME:20200713T134700Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1892@indico.inp.nsk.su DESCRIPTION:Speakers: Nataliya Klimova (Immanuel Kant Baltic Federal Univ ersity\, 236041 Kaliningrad\, Russia)\nThe construction of 4th generation synchrotron sources will make it possible to obtain a fully coherent high- energy x-ray beam with extremely low emittance and high brightness. The us e of effective refractive optics already at the radiation output (front-en d) is necessary to realize all the possibilities and fully reveal the pote ntial of new diffraction-limited sources.\nX-ray refractive lenses (herein after CRL) [1] satisfy the above requirements. Monocrystalline diamond is considered to be an ideal material for CRL\, mainly because of its stabili ty in flow and high reflectivity in the hard X-ray range. Being universal for a wide range of applications\, diamond СRL\, nevertheless\, have a fe ature for application in spectroscopic experiments\, which was noted in a recently published article [2]\, which reported on the observation of inte nsity modulation at certain energies in the transmission spectrum.\nThis i ssue is well known in X-ray spectroscopy and is called “diffraction loss ” or “glitch” [3]. In paper [2\, 4] X-rays were propagating through lenses\, while the transmitted intensity was measured at different energie s. Use of compound refractive lenses\, that were perfectly aligned by stac king in a single plate\, gave us strong diffraction losses\, reducing the outgoing signal by maximal value of 40%. The magnitude of the effect was t hen minimized down to ~ 10% by use of CRLs compiled from individual lenses with different crystallographic orientation. At the same time\, X-ray gli tches did not affect any focal spot’s size or shape while only arousing the darkening of the focal spot at exact energies of X-ray glitches [4]. D espite X-ray glitches\, monocrystalline X-ray optical materials are prefer able than polycrystalline ones. While single crystals only uniformly reduc e the outgoing intensity (i.e.\, gain factor of the lens)\, polycrystallin e materials introduce speckles and distortions to the transmitted wave fro nt. Such negative influence of the inner material limits the resolution an d optical efficiency of X-ray lenses.\nIn [5-6]\, it was found that the sp atial position of the incident X-ray beam (relative to the lens aperture) most strongly affects the intensity and position of the glitches. The valu e of the glitch intensity strongly depends on the thickness of the materia l of the test sample\, which is associated with the effect of attenuation (extinction) i.e. as the thickness of the material increases\, the fractio n of incident radiation diffracts\, which causes a decrease in the intensi ty passing through the lens. Glitches become more pronounced with increasi ng thickness of the material through which the x-rays pass.\nAlthough glit ches are always present in the transmission spectrum of single-crystal mat erials\, based on the data obtained above\, attempts were made to develop approaches to minimize or\, ideally\, get rid of glitches in the spectrum of single-crystal optical elements.\nAn important result of the proposed w ork is a theoretical model\, which was confirmed by the experimental resul ts and which allows predicting the position and strength (intensity) of gl itches if the crystallographic orientation relative to the x-ray beam is k nown with sufficient accuracy. Therefore\, performing calculations for a p recisely positioned single-crystal lens with a known crystallographic orie ntation\, it is possible to choose specific energy intervals where the eff ect of glitches will have a minimal effect.\nThe results and assumptions m ade it possible to start developing a method of getting rid of glitches at each energy using a small lens flap\, which is calculated on the basis of a program that can determine the lens orientation solely from the spectru m of glitches and on the basis of an analytical approach that allows you t o refine the orientation of the crystal and\, probably \, will allow the u se of crystalline lenses for experiments in which it is necessary to chang e the energy of the incident beam.\nHow to avoid glitches (practical guida nce). First current orientation and cell parameter of the lens has to be d etermined. For this energy of several glitches (at least 3) have to be mea sured with high precision. Then the found energies can be fitted using pro posed approach (by tilting possible K0 directions and comparing the result ing spectrum to the measured one). This will allow to assign hkl indexes t o the observed glitches. Next step is to calculate analytically the exact direction of the incident beam and cell parameter\nThis will allow to pred ict with high precision all glitches for current orientation. Next multipl e glitches spectra for different small tilts can be calculated\, so for ea ch energy a tilt with no glitches at that energy can be selected. During t he energy scan the lens has to be tilt into precomputed orientations.\nThe glitches are rather sharp\, so the tilt required to shift a glitch is sma ll. Therefore the efficiency of the lens shouldn’t suffer. The method mi ght require small increase in the lenses thickness to have possibility to tilt the lenses.\nThus\, by performing the sequence of actions indicated i n the developed approach\, the negative impact of glitches can be avoided. \nThis research was supported by the Russian Science Foundation (Project No. 19-72-30009).\nReferences: \n [1] Snigirev A. V. Kohn\, I. Snigireva a nd B. Lengeler\, A compound refractive lens for focusing high-energy X-ray s //Nature. – 1996. – Т. 384. – №. 6604. – С. 49.\n[2] M. Poli karpov\, H. Emerich\, N. Klimova. I. Snigireva and A. Snigirev Diffraction losses in monocrystalline X-ray refractive lenses // Proceedings of SPIE – 2017. – Vol.10235\, – P. 102350H-2.\n[3] G. Turiyanskii\, S. S. Gi zha\, V. M. Senkov\, I. V. Pirshin\, Y. M. Stanishevskii\, Band reject fil tration of the excitation spectrum at energy dispersive X-ray spectroscopy of weak signals // JETP Lett. – 2016\, – Vol. 104\, – P. 417.\n[4] M. Polikarpov\, H. Emerich\, N. Klimova\, I. Snigireva\, V. Savin and A. S nigirev Spectral X-ray glitches in monocrystalline diamond refractive lens es // Physica Status Solidi B – 2018. – Vol.255 – P. 1700229.\n[5] Q. Zhang\, M. Polikarpov\, N. Klimova\, H. B. Larsen\, R. Mathiesen\, Herm ann Emerich\, G. Thorkildsen\, I. Snigireva and A. Snigirev\, Investigatio n of glitches induced by single-crystal diamond compound refractive lenses based on crystal orientation//AIP Conference Proceedings. – 2019. - Vol . 2054. - P. 060007 \n[6] Q. Zhang\, M. Polikarpov\, N. Klimova\, H. B. La rsen\, R. Mathiesen\, H.Emerich\, G. Thorkildsen\, I. Snigireva and A. Sni girev\, Investigation of ‘glitches’ in the energy spectrum induced by single-crystal diamond compound X-ray refractive lenses // Journal of Sync hrotron Radiation. - 2019. – Vol. 26(1). – P. 109-118.\n\n\n---------- \n\nhttps://indico.inp.nsk.su/event/24/contributions/1892/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1892/ END:VEVENT BEGIN:VEVENT SUMMARY:The code for processing of the SRXRF spectra DTSTART;VALUE=DATE-TIME:20200713T140600Z DTEND;VALUE=DATE-TIME:20200713T140700Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1855@indico.inp.nsk.su DESCRIPTION:Speakers: Konstantin Zolotarev (Budker Institute of Nuclear Ph ysics)\nThe X-ray fluorescence (XRF) analysis with using synchrotron radia tion (SR) is a powerful technique for resolving elemental composition of t he different samples with high sensitivity and good special resolution. \ nFor precise quantitative analysis\, the procedure for robust and reliable processing of the XRF spectra is necessary. Especially\, such code is ver y important for realization scanning mode of the XRF analysis for the oper ative treatment big spectral data. \nAs a rule\, the specialized codes fo r conventional XRF systems are not suitable for this aim because of the SR excitation provides a big variety of the analysis modes. Thus\, the propo sal of the code for processing of the SRXRF spectra is very actual.\nThe m odern program libraries provide a simple ways for organizing robust fittin g XRF peaks with keeping a prior data for X-ray lines. In current work the reliable code for estimation of the XRF peaks areas was proposed. Algori thm suitable for calculation net areas of the peaks in the case of series overlapping and in case violation of the mutual intensity ratios of the line in the series due to sample absorption and due to difference in the r egistration efficiency. \nCode was tested in the new beamline for hard XRF analysis was supported by RFBR grant 17-29-05016 офи_м.\n\nhttps://in dico.inp.nsk.su/event/24/contributions/1855/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1855/ END:VEVENT BEGIN:VEVENT SUMMARY:Inverse Compton scattering at collision of electron and photon bea ms with oblique fronts DTSTART;VALUE=DATE-TIME:20200713T132400Z DTEND;VALUE=DATE-TIME:20200713T132500Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1895@indico.inp.nsk.su DESCRIPTION:Speakers: A.A. Tishchenko (National Research Nuclear Universit y MEPhI\, Moscow\, Russia\, National Research Centre “Kurchatov Institut e”\, Moscow\, Russia\, Laboratory of Radiation Physics\, Belgorod Natio nal Research University\, Belgorod\, Russia)\nInverse Compton scattering d ubbed “light undulator” is a known source of x-ray radiation\, bright and intense. Among the perspective directions of research one of the most significant is idea of Debus with co-authors: to use the laser pulse with skew front to increase the time of interaction of the electron and photon beams. The corresponding calculations were performed within classical elec trodynamics. Here\, we calculated this process in the terms of luminosity within quantum electrodynamics. Our results show that the condition sugges ted by Debus et al. for the maximal intensity will not result in the numbe r of the scattered photons compared with the conventional collinear orient ation of the fronts. \nThe study was supported by RFBR\, grant 19-29-12036 .\n\nhttps://indico.inp.nsk.su/event/24/contributions/1895/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1895/ END:VEVENT BEGIN:VEVENT SUMMARY:The study of the aerosol impurities seasonal accumulation in a sno w cover by scanning µXRF-SR. DTSTART;VALUE=DATE-TIME:20200713T140300Z DTEND;VALUE=DATE-TIME:20200713T140400Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1822@indico.inp.nsk.su DESCRIPTION:Speakers: Andrey Darin (Sobolev Institute of Geology and Miner alogy SB RAS)\nSnow cover is an ideal deposition medium in which aerosol p articles of both natural and technogenic origin are fixed and accumulated during the winter period. As a rule\, environmental studies analyze the to tal amount of aerosol accumulated. This paper presents a study of the aero sol accumulation dynamics in the vertical section of snow cover with high spatial (temporal) resolution.\nSampling over the entire height of the sno w cover accumulated during November 2019 - March 2020 was carried out on t he Novosibirsk region territory using polypropylene pipes with a diameter of 100 mm and a length of 1 m. The cores were selected to the entire depth of the snow cover to the base. After that\, the pipe was shut up from bel ow by a tight stopper\, and from above the snow was pressed by the top sto pper to a total core height of 40 cm. This was done to achieve a uniform s now density over the entire core height. Mixing of snow layers did not occ ur. Samples were transported to the laboratory of the IGM SB RAS in a froz en state. The pipes were opened along the sampling axis and placed horizon tally in a plastic box\, cooled with liquid nitrogen. Snow sublimated duri ng the day without the formation of a liquid phase. The solid components r emaining in the pipe were transferred onto a conductive adhesive tape with out disturbing their vertical distribution.\nThe analysis was carried out using the µXRF-SR according to the standard certified method at the exper imental station "Elemental analysis" in the shared research center SSTRC. Experimental conditions: excitation energy 23 keV\, dimensions of the exci ting radiation beam 1.0 mm in height and 10 mm in width of the sample. The scanning step was 1 mm in height of the sample. The distributions of more than 20 rock-forming and trace elements over the sample depth were obtain ed. The data obtained make it possible to calculate the dynamics of aeroso l accumulation. Analysis of individual particles is used to identify their sources.\nThe work was carried out in the framework of the RFBR projects no. 19-05-50046. The work was done at the shared research center SSTRC on the basis of the VEPP-4-VEPP-2000 complex at BINP SB RAS\, using equipment supported by project RFMEFI62119X0022.\n\nhttps://indico.inp.nsk.su/event /24/contributions/1822/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1822/ END:VEVENT BEGIN:VEVENT SUMMARY:X-ray phase-sensitive imaging technique based on a bilens interfer ometer DTSTART;VALUE=DATE-TIME:20200713T140800Z DTEND;VALUE=DATE-TIME:20200713T140900Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1882@indico.inp.nsk.su DESCRIPTION:Speakers: Dmitry Zverev (Immanuel Kant Baltic Federal Universi ty)\nNowadays\, the continuous evolution of synchrotron radiation sources has resulted in a dramatic increase of brilliance and degree of spatial co herence with respect to older designs. The availability of such intense co herent X-ray beams has triggered the development of wave splitting interfe rometers similar to the classical double-slit Young’s experiment [1-4]. The bilens interferometer consisting of two parallel compound refractive l enses (CRL) and characterizing by high efficiency even in hard X-rays is a remarkable demonstration of such optical devices [5].\nIn this work\, the phase-sensitive X-ray imaging technique based on the bilens interferomete r is developed [6]. The essence of the method consists of scanning a sampl e\, which is set upstream of the bilens across the beam of one lens of the interferometer by recording changes in the interference pattern using a h igh-resolution image detector. The proposed approach allows acquiring the absolute value of a phase shift profile of the sample with a fairly high p hase and spatial resolution. The possibilities of the imaging technique we re studied theoretically and experimentally using fibres with different si zes as the test samples at the ESRF ID06 beamline with 12 keV X-rays. The corresponding phase shift profile reconstructions and computer simulations were performed. The experimental results are fully consistent with theore tical concepts and appropriate numerical calculations. Future improvements and applications of the interferometric imaging technique are discussed.\ n\n[1] Leitenberger\, W.\, Kuznetsov\, S. M.\, & Snigirev\, A. (2001). Int erferometric measurements with hard X-rays using a double slit. Optics com munications\, 191(1-2)\, 91-96.\n[2] Lyubomirskiy\, M.\, Snigireva\, I.\, & Snigirev\, A. (2016). Lens coupled tunable Young’s double pinhole syst em for hard X-ray spatial coherence characterization. Optics express\, 24( 12)\, 13679-13686.\n[3] Lyubomirskiy\, M.\, Snigireva\, I.\, Kuznetsov\, S .\, Yunkin\, V.\, & Snigirev\, A. (2015). Hard x-ray single crystal bi-mir ror. Optics letters\, 40(10)\, 2205-2208.\n[4] Suzuki\, Y. (2004). Measure ment of x-ray coherence using two-beam interferometer with prism optics. R eview of scientific instruments\, 75(4)\, 1026-1029.\n[5] Snigirev\, A.\, Snigireva\, I.\, Kohn\, V.\, Yunkin\, V.\, Kuznetsov\, S.\, Grigoriev\, M. B.\, ... & Detlefs\, C. (2009). X-ray nanointerferometer based on si refr active bilenses. Physical review letters\, 103(6)\, 064801.\n[6] Zverev D. \, Snigireva I.\, Kohn V.\, Kuznetsov S.\, Yunkin V.\, Snigirev A.\, (2020 ) X-ray phase-sensitive imaging using a bilens interferometer based on ref ractive optics. Accepted for publication in journal Opt. Express\n\nhttps: //indico.inp.nsk.su/event/24/contributions/1882/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1882/ END:VEVENT BEGIN:VEVENT SUMMARY:Electron outcoupling experiments at the NovoFEL facility DTSTART;VALUE=DATE-TIME:20200713T105000Z DTEND;VALUE=DATE-TIME:20200713T111000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1006@indico.inp.nsk.su DESCRIPTION:Speakers: Yaroslav Getmanov (Budker INP)\nThe electron outcoup ling scheme was proposed for the high power FELs with optical cavities to avoid the power limitation due to overheating of the reflecting mirrors. T his can be realized if the major part of radiation power is emitted at an angle to the optical axis. For this\, the electron beam should be bunched and then slightly rotated in the undulator of the FEL. \nAt the NovoFEL facility the electron outcoupling system is installed on the third FEL bas ed on the multiturn energy recovery linac. It consists of three undulators \, dipole correctors and two quadrupole lenses assembled between them. The re are two different configurations of the system since the electrons can be deflected in either the second or the third undulator. \nThe electron beam dynamics calculations\, current experimental results and the planned experiments are discussed.\nResults of researches supported by RBRF grant 15-02-07776 were used in this work.\n\nhttps://indico.inp.nsk.su/event/24 /contributions/1006/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1006/ END:VEVENT BEGIN:VEVENT SUMMARY:Microelemental limitation of lymph nodes structure according to th e X-ray fluorescent analysis with a synchrotron radiation DTSTART;VALUE=DATE-TIME:20200713T140900Z DTEND;VALUE=DATE-TIME:20200713T141000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1779@indico.inp.nsk.su DESCRIPTION:Speakers: Vladimir Gorchakov (Novosibirsk University State)\nU nique properties of X-ray fluorescent analysis with synchrotron radiation and classical morphological method allowed to reveal interrelation between the trace elements content and structure of lymph nodes. Belonging of lym ph nodes to different regions is defining in formation of a certain microe lemental profile and features of the microanatomic organization of lymph n odes. Lymph nodes have different functional specialization with prevalence of immune or drainage function and a certain microelemental composition. The inguinal lymph node has active drainage function because of the develo ped sinus system at the maximum of Mn\, Fe\, Zn concentration\; immune fun ction prevails in a tracheobronchial lymph node at the low content of all trace elements\; the mesenteric lymph node has evenly developed drainage a nd immune functions at the maximum of Cu\, Se contents. The content of tra ce elements is considered as the leading mechanism limitation the structur al organization of lymph nodes. Innovative approach helped to reveal forma tion of lymphoid-microelemental association. Features of this association modify the structural organization of lymph nodes depending on localizatio n (region specifics).\n\nhttps://indico.inp.nsk.su/event/24/contributions/ 1779/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1779/ END:VEVENT BEGIN:VEVENT SUMMARY:Transmission Hard X-ray Interferometer-Microscope (15-35 keV) at V EPP-4 storage ring facility as a project DTSTART;VALUE=DATE-TIME:20200713T134700Z DTEND;VALUE=DATE-TIME:20200713T134800Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1897@indico.inp.nsk.su DESCRIPTION:Speakers: Elena Reznikova ()\nA new Transmission Hard X-ray In terferometer-Microscope (THXIM)\, which is based on X-ray refractive lense s and diffractive gratings\, was developed for 15-35 keV photon energies t o set up at the second front-end of VEPP-4M storage ring. The synchrotron radiation (SR) path from the bending magnet source to the experimental hut ch is 17 m. The THXIM block sequence on the SR beam course within the 6.5 m hutch distance is the following: 1) The forvacuum block includes horizon tal and vertical slits\, a multilayered X-ray mirror monochromator\, an SR beam position detector and a blocker absorbing the direct beam. 2) The bl ock of the X-ray refractive condenser lens in the air atmosphere. 3) The b lock of a research object and the X-ray refractive objective lens with X-r ay diffractive gratings is in the air environment. 4) At the end of the be amline station\, the air block of the THXIM detector is disposed\, which i ncludes an X-ray scintillator (a 100 m thin\, 1 cm large area\, CdWO4 c rystal) and an optical microscope with a planapochromate objective\, incli ned mirror and a CCD camera. Between 2\, 3 and 4 blocks\, forvacuum tubes for the beam inflights are disposed. We develop inclined X-ray lithography with SU-8 and PMMA resist\, as well as photo- and e-beam lithography and galvanoplastics technologies of gold\, nickel and aluminum microstructures in order to create X-ray refractive lenses with high aspect ratios of 3D apex elements and X-ray diffractive gratings with nanometer range periods. The X-ray refractive long compound paraboloid objective lenses with 100 m apertures and focal distances of several centimeters provide the THXI M resolution of dozens nanometers. The position choice for a THXIM researc h object within a local coherent zone\, which is obtained by means of an X -ray refractive condenser lens with a long-length focal waist\, is discuss ed.\n\nThis work is partially supported by grant №19-42-540014 of Russia n Foundation for Basic Research and Government of Novosibirsk Region.\n\nh ttps://indico.inp.nsk.su/event/24/contributions/1897/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1897/ END:VEVENT BEGIN:VEVENT SUMMARY:mu-XRF for thick specimens DTSTART;VALUE=DATE-TIME:20200713T134800Z DTEND;VALUE=DATE-TIME:20200713T134900Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1898@indico.inp.nsk.su DESCRIPTION:Speakers: Vladimir Nazmov ()\nWhen studying samples without de struction by x-ray fluorescence analysis\, the thickness of the investigat ed sample is limited by the depth of total absorption of the outgoing and excitation radiation. When analyzing complex geological objects containing high-Z atoms\, the excitation energy can reach several tens of kiloelectr onvolts\, which can generate x-ray fluorescent light from a depth of sever al hundred micrometers. However\, focused on the front plane of the sample the beam of excitation radiation is defocused at such depth\, and its cro ss-section under the conditions discussed in the report can become signifi cantly larger than the focus size. This effect is especially significant w hen the x-ray source is small\, for example\, for the SKIF synchrotron rad iation source. Based on the geometric model of the actinic voxel\, the con ditions for optimal choice of the excitation energy and focusing condition s of the initial x-ray beam are determined.\nThis work was supported in pa rt by RFBR Grant Number 17-45-540618.\n\nhttps://indico.inp.nsk.su/event/2 4/contributions/1898/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1898/ END:VEVENT BEGIN:VEVENT SUMMARY:Short-period undulators with electrostatic field DTSTART;VALUE=DATE-TIME:20200713T100000Z DTEND;VALUE=DATE-TIME:20200713T103000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1028@indico.inp.nsk.su DESCRIPTION:Speakers: NIKOLAY VINOKUROV (Budker Institute of Nuclear Physi cs)\nDue to strong sextupole corrections\, the vertical dynamic aperture o f low-emittance storage ring is rather small. Therefore\, in-vacuum small- period undulators may provide high enough field. In particular\, significa nt electrostatic field value can be obtained near electrodes. To eliminate the field emission\, the high-field surfaces has to be at positive electr ic potential. In this paper we consider the feasibility of undulator using the comb of such electrodes. It worth noting that variable-period design may be rather simple for electrostatic undulators. Results of researches s upported by RBRF grant 15-02-07776 were used in this work.\n\nhttps://indi co.inp.nsk.su/event/24/contributions/1028/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1028/ END:VEVENT BEGIN:VEVENT SUMMARY:Application of XAFS spectroscopy for study of microparticles of Si khote-Alin meteorite DTSTART;VALUE=DATE-TIME:20200713T141400Z DTEND;VALUE=DATE-TIME:20200713T141500Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1864@indico.inp.nsk.su DESCRIPTION:Speakers: Vladimir Kriventsov ()\nThe presented work shows the new results of a study of microparticles of the Sikhote-Alin meteorite us ing XANES and EXAFS methods. XANES / EXAFS spectra (Ni-K\, Fe-K\, W-L2)\, using μ- and standard methods\, for meteorite microparticles and referenc e comparison samples were obtained both on experimental module X-ray Confo cal Microscopy situated on NRC “Kurchatov Institute” (Moscow) and at X RF-\, EXAFS- stations of Siberian Synchrotron Terahertz Radiation Center ( SSTRC\, Novosibirsk). Some differences in the local structure and phase co mposition in different microparticles of the studied meteorite samples wer e determined. The interatomic distances and the corresponding coordination numbers were calculated. Various options for structural models are consid ered. Additionally\, the chemical and phase compositions\, and the morphol ogy of the samples were studied by SEM\, EDX\, and XRF methods. On the exa mple of a test meteorite\, the possibilities of the proposed approach for the study of microparticles of complex composition are shown. The data obt ained by all the methods are in a good agreement.\nThe work was carried ou t in the framework of the RFBR projects no. 19-05-50046\, 18-03-01251. The work was done at the shared research center SSTRC on the basis of the Nov osibirsk FEL/VEPP-4-VEPP-2000 complex at BINP SB RAS\, using equipment sup ported by project RFMEFI62119X0022.\n\nhttps://indico.inp.nsk.su/event/24/ contributions/1864/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1864/ END:VEVENT BEGIN:VEVENT SUMMARY:High resolution monochromator for synchrotron radiation based on f lat VLS-gratings DTSTART;VALUE=DATE-TIME:20200713T141700Z DTEND;VALUE=DATE-TIME:20200713T141800Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1869@indico.inp.nsk.su DESCRIPTION:Speakers: Alexey Shatokhin ()\nWe present the design of a high -resolution plane-VLS-grating soft X-ray and VUV monochromator of synchrot ron radiation for the 125 – 4200 Å spectral range. A concave mirror is located at a distance of 28 m from a synchrotron radiation source. The mir ror is set in a highly asymmetric scheme and focuses radiation at a distan ce of about 1350 mm. The VLS-grating is set close to the mirror and focuse s onto the exit slit the radiation diffracted in the first external order. The frequency is scanned by rotation of only the plane VLS grating. Two r eplaceable VLS-gratings with line densities of 600 1/mm and 150 1/mm are p lanned for the 125 – 1000 Å and 900 – 4200 Å spectral ranges\, respe ctively. The ruled area of the VLS gratings is 40x20 mm. The gratings and the mirror each operate for a deviation angle of 32˚\, the total deviatio n angle being equal to zero. The resolving power obtained by numerical ray tracing is higher than 2000 in the entire spectral range. This work was p artially supported by RFBR grant No.19-12-50059\n\nhttps://indico.inp.nsk. su/event/24/contributions/1869/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1869/ END:VEVENT BEGIN:VEVENT SUMMARY:Structural study of mono- bimetallic catalytic nanosystem by XAFS DTSTART;VALUE=DATE-TIME:20200713T141900Z DTEND;VALUE=DATE-TIME:20200713T142000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1872@indico.inp.nsk.su DESCRIPTION:Speakers: Vladimir Kriventsov ()\n1Kriventsov V.V.\, 1Volodin A.M.\, 1Novgorodov B.N.\, 1Zyuzin D.A.\, 1Aksenov D.G.\, 1Ivanov D.P.\, 2I ost K.N.\, 2Shlyapin D.A.\, 3Nikolaev S. A.\, 4Chistyakov A. V.\, 4Tsodiko v M.V.\n\n1Boreskov Institute of Catalysis SB RAS\, Lavrentiev Ave. 5\, No vosibirsk\, 630090\, Russia\n2Center of New Chemical Technologies BIC\, Ne ftezavodskaya St.\, 54\, Omsk\, 644040\, Russia \n3Faculty of Chemistry\, Moscow State University\, GSP-1\, 1-3 Leninskiye Gory\, Moscow 1\, 119991\ , Russia\n4Topchiev Institute of Petrochemical Synthesis RAS\, Leninsky Pr .\, 29\, Moscow\, 119991\, GSP-1\, Russia\n\n\nThe work was carried out in the framework of the RFBR projects no. 19-05-50046\, 18-03-01251. The wor k was done at the shared research center SSTRC on the basis of the Novosib irsk FEL/VEPP-4-VEPP-2000 complex at BINP SB RAS\, using equipment support ed by project RFMEFI62119X0022.\n\nhttps://indico.inp.nsk.su/event/24/cont ributions/1872/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1872/ END:VEVENT BEGIN:VEVENT SUMMARY:Determination of the state of the active component of nanocomposit e model metal-carbon catalysts by XAFS method DTSTART;VALUE=DATE-TIME:20200713T142100Z DTEND;VALUE=DATE-TIME:20200713T142200Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1899@indico.inp.nsk.su DESCRIPTION:Speakers: Vladimir Kriventsov ()\nThis report shows the result s of XAFS (XANES/EXAFS) research on the state and local structure of metal s in the active component of model low-percentage metal-carbon nanocomposi te catalysts containing nanoscale forms of Pt\, Pd\, Ru. It is a well-know n fact that low-percentage catalytic nanosystems containing platinoids dep osited on various carbon carriers are of great interest to researchers bec ause of their practical significance\; possibilities for varying catalytic properties and applications for a wide range of processes (hydrogenation\ , conversion of industrial substrates\, debenzylation of amines\, etc.).)\ , low cost of final products\, ease of disposal and recovery of expensive components from spent catalysts. Model samples were prepared from precurso rs of different nature\, with varying methods of synthesis and formation o f the applied component\, recovery and activation modes. XAFS (XANES/EXAFS ) spectra (Pt-L3\, Pd-K\, Ru-K) of studied samples were recorded at SSTRC\ , Novosibirsk. The lengths of interatomic bonds and the corresponding coo rdination numbers are established. Additionally XPS\, TEM\, XRD\, XRF meth ods were applied to study chemical and phase compositions\, morphology of the samples. Data obtained by different methods do not contradict each oth er. Possible variants of structural models are considered in detail. Corre lations were found between the structure of the active component and the c atalytic properties of the studied samples. The perspective of the propose d approach for the study of nanocomposite model metal-carbon catalysts con taining platinoids is shown.\nThe work was carried out in the framework of the RFBR projects no. 19-05-50046\, 18-03-01251. The work was done at the shared research center SSTRC on the basis of the Novosibirsk FEL/VEPP-4-V EPP-2000 complex at BINP SB RAS\, using equipment supported by project RFM EFI62119X0022.\n\nhttps://indico.inp.nsk.su/event/24/contributions/1899/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1899/ END:VEVENT BEGIN:VEVENT SUMMARY:Structural study of bimetallic catalytic nanosystems containing pr ecious metals by XAFS spectroscopy DTSTART;VALUE=DATE-TIME:20200713T142200Z DTEND;VALUE=DATE-TIME:20200713T142300Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1900@indico.inp.nsk.su DESCRIPTION:Speakers: Vladimir Kriventsov ()\nThis work presents the resul ts of a study of the local structure of the active component of mono-\, bi -metallic low-percentage (~1%) catalysts (containing Pt\, Au\, Pd\, Ru) st abilized on oxide carriers using XAFS method (XANES/EXAFS). Studying the n ature of nano-forms of noble metal stabilization is promising for creating effective catalysts for various applications\, including catalytic system s for alternative energy applications. The development of synthesis method s can lead to a significant economic gain\, due to the reduction of the me tal content and optimization of the catalytic properties of the system. Mo del catalysts were prepared from mono-and bimetallic complexes\, with vary ing synthesis methods: sol-gel\, ion exchange\, impregnation\, reducing mo des\, and the nature of carriers. XAFS (XANES/EXAFS) spectra (Pt-L3\, Au-L 3\, Pd-K\, Ru-K) of studied samples were recorded at SSTRC\, Novosibirsk. Genesis of the local structure of the active component was studied\, inclu ding the study of oxidized precursors and catalysts after reducing and act ivation. It is established that depending on the background\, it is possib le to form various nanoscale forms of noble metals localized on the surfac e of the oxide carrier. Additionally\, the samples were studied by XRD\, X PS\, XRFA\, HRTEM. Variants of possible structural models are considered i n detail.\nThe work was carried out in the framework of the RFBR projects no. 19-05-50046\, 18-03-01251. The work was done at the shared research ce nter SSTRC on the basis of the Novosibirsk FEL/VEPP-4-VEPP-2000 complex at BINP SB RAS\, using equipment supported by project RFMEFI62119X0022.\n\nh ttps://indico.inp.nsk.su/event/24/contributions/1900/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1900/ END:VEVENT BEGIN:VEVENT SUMMARY:XRD Diagnostics of Functional Materials at SSTRC DTSTART;VALUE=DATE-TIME:20200714T101000Z DTEND;VALUE=DATE-TIME:20200714T103000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1036@indico.inp.nsk.su DESCRIPTION:Speakers: Alexander Shmakov (Boreskov Institute of Catalysis S D RAS)\nThe studies of the structure\, phase composition and phase transfo rmation of functional materials such as catalysts\, sorbents\, ion conduct ors\, coatings\, etc. are performed at Beamlines No.2 and No.6 of VEPP-3 a nd No.8 of VEPP-4M electron storage rings at Siberian Synchrotron and Tera hertz Radiation Centre. The Beamline No.2 is dedicated to high resolution X-ray powder diffraction experiments\; the Beamline No.6 operates as X-ray diffractometer for In Situ and Operando studies\, while the facility at B eamline No.8 provides high energy X-ray diffraction\, up to 100-120 keV. T he report comprises description of the experiments on the phase compositio n of Ga-activated aluminum\, oxygen mobility in Ruddlesden-Popper phases\, reduction process of mixed oxides\, local structure of heterogeneous cata lysts by means of Total Scattering and Pair Distribution Functions techniq ue\, and so on.\n\nhttps://indico.inp.nsk.su/event/24/contributions/1036/ LOCATION: Zoom 890 9721 5207 URL:https://indico.inp.nsk.su/event/24/contributions/1036/ END:VEVENT BEGIN:VEVENT SUMMARY:Structural analysis of catalysts using the atomic pair distributio n function DTSTART;VALUE=DATE-TIME:20200714T111000Z DTEND;VALUE=DATE-TIME:20200714T113000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1854@indico.inp.nsk.su DESCRIPTION:Speakers: Vera Pakharukova (Boreskov Institute of Catalysis)\n The elaboration of catalytic materials is related to abilities to effectiv ely probe nano-scale structures. There is significant drawback to common X RD methods addressed to well-crystallized materials\, since catalyst compo nents are often highly dispersed and present at low concentrations. The Pa ir Distribution Function (PDF) analysis based on operating with total scat tering data is one of the techniques of choice for structural characteriza tion of catalytic materials. Structural characterization of catalysts by t he PDF analysis has attracted particular interest in the last years\; the method has already proven itself a powerful technique for the study on hig hly dispersed\, defect-rich and amorphous components of catalysts. The PDF describes local atomic structure of the material and provides structural information in the form of a radial distribution function of inter-atomic distances.\nIn the talk\, the PDFs calculated from synchrotron radiation d ata for different catalysts will be presented and types of structural info rmation extracted from the PDFs will be discussed. The possibilities of th e method to probe structure of supported nanoparticles in catalysts will b e shown for some examples: 1) mono- and bimetallic (Pt\, Rh)/γ-Al2O3 cata lysts for hydrocarbon oxidation\; 2) Ni/CeO2 catalyst for CO methanation 3 ) MoS2/Al2O3 hydrotreating catalysts. The data will illustrate that the PD F analysis is effective tool for study on structural organization of the s upported catalysts and can be used to not only determine the nanoparticle structure but also assess particle shape\, size of atomic ordering.\n\nhtt ps://indico.inp.nsk.su/event/24/contributions/1854/ LOCATION: Zoom 890 9721 5207 URL:https://indico.inp.nsk.su/event/24/contributions/1854/ END:VEVENT BEGIN:VEVENT SUMMARY:STUDY THE DIAMOND THIN MEMBRANES BY X-RAY REFLECTOR-INTERFEROMETER Y AT THE ESRF BEAMLINE ID10 DTSTART;VALUE=DATE-TIME:20200713T143600Z DTEND;VALUE=DATE-TIME:20200713T143700Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1893@indico.inp.nsk.su DESCRIPTION:Speakers: Svetlana Lyatun (Immanuel Kant Baltic Federal Univer sity)\nToday\, the combination of new generation X-ray sources with modern optical elements gives a strong impetus to the development of new researc h methods\, and to improve the classical methods. One such method is X-ray reflectometry (XRR). Despite the widespread use for thin-film structures study\, XRR has a strong limitation related with the size and surface qual ity of the samples.\nRefractive optics is the most dynamically developing kinds of X-ray optical elements [1-2]. CRLs quickly gained popularity amon g synchrotron sources users due to their ease of operation and the possibi lity of application in a wide range of energies [3-4].\nIn this work\, a n ew X-ray reflecto-interferometer (XRI)\, based on CRL\, was demonstrated t o study thin-film structures using the synchrotron X-ray source [5]. Due t o the CRL focusing properties\, X-rays incident on the sample surface cont ain the necessary range of angles for the formation of an interference pat tern in one shot.\nThe capabilities of the new XRI were demonstrated at th e ESRF ID10 beamline (Grenoble\, France). The Si3N4 and diamond membranes with thicknesses 100 and 200 nm were studied using X-rays of energy 22 keV . Experimentally obtained reflecto-interferograms are in good agreement wi th calculated ones\, and the distance between fringes in the interference patterns corresponds to the thickness of the tested membranes.\nThe new XR I opens wide horizons both for rapid thin-film and multilayer analysis and for studying the dynamics of processes on the surface and in the depth of the sample\, as well as for studying complex structured and biological sa mples.\nThis research was supported by the Russian Science Foundation (Pro ject No. 19-72- 30009). \n\n[1] Snigirev\, V. Kohn\, I. Snigireva and B. L engeler\, Nature\, vol. 384\, 49-51 (1996)\n[2] Snigirev\, I. Snigireva\, Springer Series in Optical Sciences\, vol. 137\, 255-285 (2008)\n[3] Snigi rev\, V. Kohn\, I. Snigireva\, et.al.\, Appl. Opt.\, 37\, 653-662 (1998)\n [4] Bosak\, I. Snigireva\, K. S. Napolskii\, A. Snigirev\, Adv.Mater.\, 2 2\, 3256–3259 (2010)\n[5] Lyatun\, S.\, Zverev\, D.\, Ershov\, P.\, Lyat un\, I.\, Konovalov\, O.\, Snigireva\, I.\, & Snigirev\, A. (2019). X-ray reflecto-interferometer based on compound refractive lenses. Journal of sy nchrotron radiation\, 26(5).\n\nhttps://indico.inp.nsk.su/event/24/contrib utions/1893/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1893/ END:VEVENT BEGIN:VEVENT SUMMARY:Conceptual design of the "Fast Processes" beamline at the SRF SKIF 4th generation synchrotron DTSTART;VALUE=DATE-TIME:20200715T074000Z DTEND;VALUE=DATE-TIME:20200715T080000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1904@indico.inp.nsk.su DESCRIPTION:Speakers: Ivan Rubtsov (Lavrentyev Institute of Hydrodynamics of the Siberian Branch of the Russian Academy of Sciences)\n“Fast Proces ses” is one out of six 1st priority beamlines that are planned for const ruction within the project SRF SKIF (Shared Research Facility “Siberian circular photon source") [1]. The beamline would include two independent i nstruments installed at a wiggler source\, i.e.\, Dynamic processes and Pl asma. The beamline is designed to meet a wide range of research and techno logical challenges related to processes occurring in nano- and microsecond timescales. The current conceptual design of the beamline aims at a compl ex approach to structural studies of various objects relying on high-brigh tness synchrotron radiation beams.\nThe beamline would implement X-ray dif fraction\, small-angle scattering\, and radiography techniques with a high temporal resolution\, with a typical delay between frames down to 2.8 ns and exposures of about 50 ps.\nThe assortment of scientific problems to be solved at the beamline includes studies of detonation processes\; impact of explosion and shock waves on structural materials\; dynamic endurance a nd fracture emergence\; influence of laser irradiation and plasma on a var iety of substances. The aforementioned synchrotron-based techniques will a llow us to track structural changes along the detonation and shock-wave fr ont\, detect the formation of nanoparticles from explosion products (e.g.\ , nanodiamonds)\, and elucidate the phase composition and local structure of substances subjected to extreme dynamic impacts.\n \n[1] http://srf-ski f.ru\n\nhttps://indico.inp.nsk.su/event/24/contributions/1904/ LOCATION: Zoom 890 9721 5207 URL:https://indico.inp.nsk.su/event/24/contributions/1904/ END:VEVENT BEGIN:VEVENT SUMMARY:THE RESEARCH OF STRUCTURE AND MORPHOLOGY OF POWDER TYPE D-16 AND M ATERIAL ON IT’S BASIS OBTAINED BY METHOD OF 3D PRINTING DTSTART;VALUE=DATE-TIME:20200713T130000Z DTEND;VALUE=DATE-TIME:20200713T130100Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1021@indico.inp.nsk.su DESCRIPTION:Speakers: Danil Eselevich (ISSC UB RAS)\nAluminum alloys with copper as a structural material are widely used in various fields of indus try. Currently\, there is growing significant interest in the method of 3D printing of products based on ferrous and non-ferrous metal alloys using selective laser fusion (SLS) technology. In addition to choosing the type of laser and the parameters of the manufacturing process\, the quality of the materials obtained is influenced by the physicochemical properties of the initial powder (the stability of oxide films on the surface of particl es\, the tendency to form low melting phases\, etc.). \nThe structure of the surface and volume of a 3D product obtained by the method of selectiv e laser alloying from a powder of alloy D-16 was studied. It was found by the XPS method that on the surface of the sample there is an Al2O3 layer a bout 3 nm thick\, and below it an Al-Cu metal alloy with a copper content of ~ 5 mass. %\, which coincides with the EDX analysis performed on the in itial powder by scanning electron microscopy. Local areas with a high copp er content (up to 13 at. %) were found at the grain boundaries of the crys tals. A high porosity of the fused sample was established (5-6%)\, which i s almost two times higher than permissible for materials obtained by the S LS method. This is due to the crystallization features of Al-Cu system all oys associated with the transfer of matter along the interfaces\, as well as to non-optimal 3D printing conditions. \nIt is of interest to study t he physicochemical properties of D-16 powder at a synchrotron radiation so urce. \nThe research was carried out within the state assignment of FASO of Russia (theme № АААА-А19-119031890028-0)\n\nhttps://indico.inp. nsk.su/event/24/contributions/1021/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1021/ END:VEVENT BEGIN:VEVENT SUMMARY:Numerical simulation of the interaction of terahertz waves with di ffraction metal gratings and conditions for the generation of surface plas mons DTSTART;VALUE=DATE-TIME:20200713T135400Z DTEND;VALUE=DATE-TIME:20200713T135500Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1805@indico.inp.nsk.su DESCRIPTION:Speakers: Oleg Kameshkov ()\nIn the terahertz plasmonics\, it is widely used wavelength 1D grooved metal gratings for excitation of surf ace plasmon polaritons (SPPs). SPPs are traveling charge density waves at the surface of conducting materials. Since these modes have a non-radiativ e nature\, it is possible to excite them only if the configuration providi ng the wavevector-matching condition between the incident light and SPP di spersion law. The wavelength gratings are the most suitable and cheaper so lution to satisfy this requirement. The careful optimization of the most suitable experimental parameters by the numerical simulations leads to the enhancement of surface plasmon resonance response. In this paper\, numeri cal results of grating optimization with different groove profiles are dis cussed. The work was supported by RSF grant 19-12-00103\n\nhttps://indico. inp.nsk.su/event/24/contributions/1805/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1805/ END:VEVENT BEGIN:VEVENT SUMMARY:Optically coupled X-Ray imaging system\, from microscopy to macros copy DTSTART;VALUE=DATE-TIME:20200713T113000Z DTEND;VALUE=DATE-TIME:20200713T115000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1905@indico.inp.nsk.su DESCRIPTION:Speakers: Xavier Rochet (Optique Peter)\nOptically coupled X-R ay imaging systems exist for years\, mostly dedicated to a given range of magnification that can be arbitrary split in two families with a boundary between 1X to 4X magnification\nOptical coupling allows to limit the numbe r of components located in the X-Ray beam axis\, thus interesting for high flux and high energies X-Ray imaging applications\n- X-Ray imaging micros copes for higher magnifications\n- X-Ray imaging macroscopes for lower mag nifications\nX-Ray imaging microscopes are designed for years on the same optical setup as most standard biological and material microscopes : infin ite corrected microscope objectives associated with imaging tube lens. Spe cific radiation hardened objectives have been designed to avoid objective browning under X-Ray\, Near UV microscope have been recently designed for fast imaging applications.\nX-Ray imaging macroscopes are either designed on single objective or tandem objective configurations\, each solution hav ing its advantages and drawbacks\nNew optical design allow to propose a ra nge of high resolution / high Numerical Aperture X-Ray imaging systems in the magnification range located between microscopy and macroscopy\nThose i nstruments can be single or multiple resolution.\nOthers setups allow to c ombine zoom systems for low magnification to dedicated high resolution/hig h magnification microscope objectives\n\nhttps://indico.inp.nsk.su/event/2 4/contributions/1905/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1905/ END:VEVENT BEGIN:VEVENT SUMMARY:Комбинированный подход к моделиров анию электронной структуры материалов\, содержащих тяжелые переходные металлы\, лантаноиды и актиноиды. Применение к гал огенидам иттербия\, ферсмиту и ксенотиму с примесными атомами урана и тория DTSTART;VALUE=DATE-TIME:20200715T084000Z DTEND;VALUE=DATE-TIME:20200715T090000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1018@indico.inp.nsk.su DESCRIPTION:Speakers: Anatoly V. Titov (NRC "Kurchatov institute" -PNPI)\n Лабораторией квантовой химии НИЦ «Курча товский институт» - ПИЯФ (http://qchem.pnpi.spb.ru) р азработан комбинированный подход на осн ове потенциала встраивания кластера в к ристалл (который мы назвали «настраивае мым под соединение» потенциалом внедрен ия\, НСПВ\, или compound-tunable embedding potential\, CTEP) [1-3 ] для исследования различных свойств мат ериалов (периодических структур\, структ ур с примесными центрами\, адсорбции ато мов и молекул на поверхностях и других) в рамках кластерного моделирования матер иалов с высокой точностью. В первую очер едь это касается расчётов свойств «атом ов в соединении» [4]\, таких как химически е сдвиги (ХС) рентгеновских эмиссионных ( флуоресцентных) спектров (РЭС) тяжелых а томов в эффективном кристаллическом окр ужении\, тонкого и сверхтонкого расщепле ния. В случае ионно-ковалентных кристалл ов НСПВ может быть представлен в виде ли нейной комбинации нелокальных (полулока льных) псевдопотенциалов для атомов бли жнего окружения и совокупности эффектив ных зарядов на атомах дальнего окружени я без явного включения электронов атомо в окружения в расчет. «Основной кластер» рассматривается в рамках обычных прибл ижений (DFT и точные методы типа связанных кластеров)\, используемых в расчетах мол екул. \n \nИспользование кластерных расч етов с НСПВ особенно актуально для изуче ния электронной структуры и физико-хими ческих свойств материалов\, содержащих т яжёлые переходные металлы (d-элементы)\, л антаноиды и актиноиды (f-элементы)\, для к оторых требуется учет релятивистских эф фектов (включая брейтовские и квантовоэ лектро-динамические) и для которых не су ществует надежных альтернативных метод ов расчета. К числу таких кристаллов отн осятся тантало-ниобаты и другие минерал ы\, которые рассматриваются в литературе как перспективные природные «матрицы» для долговременной иммобилизации (захор онения) высокоактивных ядерных отходов\, в первую очередь актиноидов. Возможност и нового комбинированного подхода проде монстрированы в пилотных расчетах галог енидов иттербия (YbF2\,3 и YbCl2\,3)\, ферсмита (Ca Nb2O6) и ксенотима (YPO4) с примесными атомами урана и тория. Наибольшая эффективность применения комбинированного подхода ож идается в сочетании с современными эксп ериментальными методами исследования с оединений d- и f-элементов\, в частности\, с использованием источников синхротронн ого излучения и лазеров на быстрых элект ронах. Перспективы других применений но вого подхода обсуждаются. \n \n1\\. DA Maltsev\, YV Lomachuk\, VM Shakhova\, NS Mosyagin\, LV Skripnikov\, AV Titov\, Compo und-tunable embedding potential method and its application to fersmite cry stal\, arXiv:1907.06947 (2019) \n2\\. YV Lomachuk\, DA Maltsev\, NS Mosy agin\, LV Skripnikov\, RV Bogdanov\, AV Titov\, \nWhich oxidation state of uranium and thorium as point defects in xenotime is favorable? arXiv:19 11.00365 (2019) \n3\\. V.M. Shakhova\, D.A. Maltsev\, Yu.V. Lomachuk\, N .S. Mosyagin\, L.V. Skripnikov\, A.V. Titov\, Compound-tunable embedding p otential method and its application to ytterbium fluoride crystals YbF2 an d YbF3\, arXiv:1911.04332 (2019) \n4\\. Titov A.V.\, Lomachuk Y.V.\, Skr ipnikov L.V.\, Concept of effective states of atoms in compounds to descri be properties determined by the densities of valence electrons in atomic c ores\, Physical Review A 90\, 052522 (2014).\n\nhttps://indico.inp.nsk.su/ event/24/contributions/1018/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1018/ END:VEVENT BEGIN:VEVENT SUMMARY:EFFECT OF TiOy STOICHIOMETRY ON THE STRUCTURE OF TiOy/HAP NANOCOM POSITE DTSTART;VALUE=DATE-TIME:20200713T132700Z DTEND;VALUE=DATE-TIME:20200713T132800Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1025@indico.inp.nsk.su DESCRIPTION:Speakers: Danil Eselevich (Institute of Solid State Chemistry UB RAS)\nComposite materials based on hydroxyapatite (HAP) are of much int erest for biology and medicine owing to their bioactivity. The advanced st rength properties of HAP can be achieved by its reinforcement with dispers ed titanium and titanium oxide particles. This makes it possible to combin e biocompatibility with high mechanical strength and fracture toughness. \nThe structure of initial TiOy nanopowders and nanocomposite materials H AP/TiOy with different stoichiometry (TiO0.92 and TiO1.23) has been studie d. The XRD\, IR and Raman spectroscopy methods were used to establish the dependence of the shift and relative intensity of bands in the region of 1 44–151 cm–1 in Raman spectra on the relative content of vacancies and Ti-O bond length. Depending on the stoichiometry of additive during heat t reatment\, surface groups [Ti(OH)2]2+ and [TiHPO4]2+ are formed on interfa ces of matrix and reinforcing additive nanoparticles\, partial cationic he terovalent substitution of Ti3+ and Ti4+ for Ca2+ takes place\, and new ph ases\, in particular Ti4.5O5 and TiO2\, are formed. The stoichiometry of a dditives affects the initial process of formation of new phase\, the phase composition of nanocomposites at different annealing stages\, as well as the physical properties of final product. \nOf interest are the in situ studies of the physicochemical properties of HAP/TiOy nanocomposites on a synchrotron radiation source\, which can provide an insight into the pecul iarities of interaction of additives with the matrix and the sequence of p hase formation when nanoparticles come in contact. \nThe reported study was funded by RFBR\, project number 20-03-00675.\n\nhttps://indico.inp.nsk .su/event/24/contributions/1025/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1025/ END:VEVENT BEGIN:VEVENT SUMMARY:Relaxation times of donor bound electrons in silicon and germanium DTSTART;VALUE=DATE-TIME:20200714T104000Z DTEND;VALUE=DATE-TIME:20200714T110000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1790@indico.inp.nsk.su DESCRIPTION:Speakers: Roman Zhukavin (Institute for Physics of Microstruct ures)\nThe results of pump-probe experiments devoted to investigation of r elaxation of bound electrons in elemental semiconductors will be presented . The radiation of free electron lasers was used to excite the donor and m easure the relaxation times. Several donors were investigated to uundersta nd the common features as well as difference originated from different che mical nature of particular donor. The uniaxial stress was used to modify t he multivalley donor states. The typical relaxation times of bound electro ns while emitting acoustical phonons in silicon were measured to be in the range of hundreds or tens of picoseconds. The optical phonon assisted rel axation yields picosecond times. The applied stress allowed to suppess the relaxation rates in the case of the resonances with intervalley phonons. In the case of donors in germanium the typical relaxation times are in the subnanosecond or nanosecond range. The binding energy of group-V donors i n germanium is less than optical phonons (10-14 meV) thus the intervalley phonons which could influence the relaxation are of TA type. The stress ap plication to germanium crystal results in increase of lifetimes for some d onor states. For the case of Ge:As the pump-probe experiments allow to det ermine lifetime for 1s split off state. The latter result helps to suppose the possible inversion in the system under optical pumping.\n\nhttps://in dico.inp.nsk.su/event/24/contributions/1790/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1790/ END:VEVENT BEGIN:VEVENT SUMMARY:The design of «Structural Diagnostics» beamline for SRF «SKIF» DTSTART;VALUE=DATE-TIME:20200715T072000Z DTEND;VALUE=DATE-TIME:20200715T074000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1026@indico.inp.nsk.su DESCRIPTION:Speakers: Boris Zakharov (Boreskov Institute of Catalysis SB R AS\, Novosibirsk State University)\nThe design of the user station for a f ourth-generation synchrotron radiation (SR) source SRF “SKIF” has been proposed. The station is designed to solve a wide range of research and t echnological tasks using X-ray diffraction techniques. The concept of the station is based on the implementation of a complex approach to the struct ural studies of synthetic and natural objects. The most complete set of ex perimental diffraction techniques will allow one to benefit from the uniqu e advantages of a modern SR source\, including advanced X-ray optic soluti ons\, high SR brightness and efficient X-ray detectors. \n \nSupercondu cting undulator with a magnetic period of 15.6 mm\, an interpolar gap of 8 mm and a total length of 2 m will be used as insertion device (ID). In th e main mode the magnetic field in the undulator will be 1.06 T (K = 1.54) giving SR harmonics generation with a step of 2.5 keV. The station include s four sections: High-resolution powder diffraction (section 1-2-1)\; In s itu diffraction (section 1-2-2)\; Single-crystal X-ray diffraction (sectio n 1-2-3)\; Small angle X-ray scattering (section 1-2-4). In the main opera ting mode of the ID all the sections are supposed to work simultaneously. This is achieved by splitting the components of the SR spectrum between di fferent sections by three beam multiplexing monochromators (beam splitters ). Flat diamond plates with an (111) orientation and a thickness of about 100 μm will be used to split the beam. The components of ID spectrum with energies of 12.50 keV / 0\, 99 Å\, 22.50 keV / 0.55 Å and 32.50 keV / 0 .38 Å will be directed to side sections of the station at angles of 28\, 15 and 11° with respect to primary beam. For the experiments requiring en ergy scanning an alternative mode will be used provided by the possibility of the change of the magnetic field in the undulator. In this mode the un dulator radiation transmitted to only 1-2-1 section due to the restriction s of the multibranch optical design. To obtain the necessary beam paramete rs we plan to use the refractive X-ray optics beryllium\, diamond or alumi num lenses depending on beam energy. To detect diffraction pattern\, we pr opose to use modern hybrid-type detectors based on sensors made of silicon or cadmium telluride for high energy applications. \n \n**Acknowledgem ents** \n \nThe work was supported by Ministry of Science and Higher Ed ucation of the Russian Federation (grant No. АААА-А19-119020890025-3) .\n\nhttps://indico.inp.nsk.su/event/24/contributions/1026/ LOCATION: Zoom 890 9721 5207 URL:https://indico.inp.nsk.su/event/24/contributions/1026/ END:VEVENT BEGIN:VEVENT SUMMARY:W-containing PMMA-based nanocomposite DTSTART;VALUE=DATE-TIME:20200713T133100Z DTEND;VALUE=DATE-TIME:20200713T133200Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1038@indico.inp.nsk.su DESCRIPTION:Speakers: Vladimir Nazmov (BUdker Institute of Nuclear Physics )\nThe development of polymer nanocomposites has been an area of ​​adv anced scientific and industrial interests in the last ten years in connect ion with advances in improving the properties of materials based on a comb ination of a polymer matrix and\, as a rule\, inorganic nanomaterial. As a result\, new materials are formed with improved properties such as mechan ical resistance\, strength and stiffness\, electrical conductivity and the rmal conductivity\, increased flame retardant properties\, lower diffusion coefficient of vapors and gases. Nanocomposites can also demonstrate uniq ue engineering capabilities that guarantee the benefits of creating functi onal materials with desired properties for specific applications. Therefor e\, it is promising to use new materials in micromachining to obtain funct ional microstructures. Some micromachining technologies are based on the u se of photo and electronic resists\, which are just an organic polymer or prepolymer\, and the introduction of inorganic particles into it increases the chemical and thermal stability and mechanical stability of microstruc tures. One of the promising applications of LIGA technology is the formati on of an X-ray detector with high spatial resolution. The introduction of inorganic particles of the inorganic particles of the GdO2S2 scintillator with a grain size of several microns into the technological layer of the r esist promotes the conversion of X-ray radiation\, but significantly limit s the spatial resolution. On the other hand\, large particles scatter the generated radiation in the visible range of the spectrum. Therefore\, we h ave developed a method of in-situ polymerization of dispersing PMMA partic les of submolecular size into an electronic resist\, which stimulate the t ransformation of X-ray radiation into visible-spectrum radiation. The resu lts of the resulting X-ray detector based on a polymer nanocomposite are r eported in this report. This work is partially supported by RFBR grant № 19-42-540014.\n\nhttps://indico.inp.nsk.su/event/24/contributions/1038/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1038/ END:VEVENT BEGIN:VEVENT SUMMARY:Technical and software improvements of the EPR spectroscopy statio n at the NovoFEL facility: status 2020. DTSTART;VALUE=DATE-TIME:20200713T135000Z DTEND;VALUE=DATE-TIME:20200713T135100Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1009@indico.inp.nsk.su DESCRIPTION:Speakers: Anatoly Melnikov (International Tomography Center)\n This contribution describes the current state of the X-band EPR setup at t he Novosibirsk Free Electron Laser facility (NovoFEL). Recent advances in experimental hardware and software are discussed in detail. Improvements i nclude implementations of fast detectors for recording the THz macropulses during experiment\, possibility of simultaneous use of two oscilloscopes\ , configured at different timescale\, and the development of software for on-the-fly data treatment. Modification of hardware and software of the EP R spectroscopy station at NovoFEL facility was funded by the Russian Scien ce Foundation\, grant number 17-13-01412. Synthesis of [Co0.01Zn0.99(piv)2 (2-NH2-Py)2] complex was funded by IGIC RAS state assignment.\n\nhttps://i ndico.inp.nsk.su/event/24/contributions/1009/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1009/ END:VEVENT BEGIN:VEVENT SUMMARY:Investigation of the local phase composition and morphology of las er welded joints based on titanium and aluminum alloys by hard synchrotron radiation diffraction methods. DTSTART;VALUE=DATE-TIME:20200714T103000Z DTEND;VALUE=DATE-TIME:20200714T105000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1041@indico.inp.nsk.su DESCRIPTION:Speakers: Alexey Ancharov (Institute of Solid State Chemistry and Mechanochemistry SB RAS)\nLaser welding is one of the most promising m ethods in comparison with other methods of welding dissimilar materials. T his method does not require the use of additional materials\, special edge processing\, and also has a high welding speed. The aim of the work was t o study the phase composition and morphology of various zones of the welde d joint between alloys based on aluminum and titanium. . The phase composi tion and morphology of the welds were studied at the experimental station of the 4th SI channel from the VEPP-3 storage ring. We used the technique of shooting in the light. A thin beam (0.1 mm across the width of the seam and 0.4 mm along the length of the seam) of monochromatic synchrotron rad iation passes through the welded joint and gives a two-dimensional diffrac tion pattern recorded by a two-coordinate flat detector. The use of synchr otron radiation made it possible to identify the fundamental laws of the f ormation of the micro and nano structure of the weld\, to determine the ma in phase composition. Scanning with a thin SR beam for the first time inve stigated the structural-phase composition of laser welded joints of dissim ilar materials in different zones of the weld from titanium to aluminum at different displacements of the laser beam. This allowed us to choose a we lding mode in which the strength of a heterogeneous weld increased by 2.5 times. \nThis method\, due to the small diameter of the focused radiatio n\, makes it possible to obtain a thin diffusion zone in which intermetall ic compounds are formed\, vary the width of this zone due to the movement of laser radiation\, and thereby change the mechanical characteristics of the resulting dissimilar welded joints. \nThe work on optimizing welding conditions and studying the microstructure was carried out in the framewo rk of the Program of Fundamental Scientific Research of the State Academie s of Sciences for 2013-2020 (project AAAA-A17-117030610122-6). The work wa s carried out using the equipment of the Mechanics and Processing Center ( ITAM SB RAS). Diffraction studies were carried out using the infrastructur e of the Siberian Center for Synchrotron and Terahertz Radiation as part o f the state task of the Institute of Chemical Technology and Technology of the SB RAS (project No. AAAA-A17-117030310280-6).\n\nhttps://indico.inp.n sk.su/event/24/contributions/1041/ LOCATION: Zoom 890 9721 5207 URL:https://indico.inp.nsk.su/event/24/contributions/1041/ END:VEVENT BEGIN:VEVENT SUMMARY:Welcome speech from SSRC Director DTSTART;VALUE=DATE-TIME:20200713T070000Z DTEND;VALUE=DATE-TIME:20200713T071000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1906@indico.inp.nsk.su DESCRIPTION:Speakers: Gennady Kulipanov (Director of SSTRC)\nhttps://indic o.inp.nsk.su/event/24/contributions/1906/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1906/ END:VEVENT BEGIN:VEVENT SUMMARY:High Energy Photon Source (HEPS) and its current status DTSTART;VALUE=DATE-TIME:20200713T074000Z DTEND;VALUE=DATE-TIME:20200713T081000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1907@indico.inp.nsk.su DESCRIPTION:Speakers: Ye Tao (HEPS)\nhttps://indico.inp.nsk.su/event/24/co ntributions/1907/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1907/ END:VEVENT BEGIN:VEVENT SUMMARY:Application of complex studies of test samples for the implementat ion of combined SR methods for the study of micro-objects DTSTART;VALUE=DATE-TIME:20200713T141100Z DTEND;VALUE=DATE-TIME:20200713T141200Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1781@indico.inp.nsk.su DESCRIPTION:Speakers: Vladimir Kriventsov ()\nThis work shows the results of the study of trial test samples of technological and natural origin\, a nd using a complex composition for the development of combined methods bas ed on synchrotron radiation (SR)\, such as μ-XANES/EXAFS\, μ-XRF\, and o thers. Main goal of the study is to adapt the developed integrated approac h for the study of micro-inclusions and microparticles by SR methods in th e near future. All the spectra of the studied samples were recorded using standard methods\, both at the experimental module of x-ray confocal micro scopy located at NRC “Kurchatov Institute” (Moscow) and at XRF-\, EXAF S- stations of Siberian Synchrotron Terahertz Radiation Center (SSTRC\, No vosibirsk).\nThe studied test samples with a complex composition (such as low-percentage metal oxide nanocomposites\, nanoalloys\, and samples of na tural origin) were synthesized and/or selected from existing collections. Test samples and benchmarks necessary for testing and developing SR techni ques were studied by a set of methods (μ-XANES/EXAFS\, μ-XRF\, XAFS\, XR F\, HRTEM\, XPS\, SEM\, EDX\, etc.). New information about phase and eleme nt compositions\, atomic structure\, morphology\, and structural parameter s was obtained for the test systems under study. The data obtained by all the methods are in a good agreement. The possibilities of the proposed app roach for the study of microparticles and micro-inclusions of complex comp osition by methods implemented using synchrotron radiation are demonstrate d.\nThe work was carried out in the framework of the RFBR projects no. 19- 05-50046\, 18-03-01251. The work was done at the shared research center SS TRC on the basis of the Novosibirsk FEL/VEPP-4-VEPP-2000 complex at BINP S B RAS\, using equipment supported by project RFMEFI62119X0022.\n\nhttps:// indico.inp.nsk.su/event/24/contributions/1781/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1781/ END:VEVENT BEGIN:VEVENT SUMMARY:The Novosibirsk free electron laser facility DTSTART;VALUE=DATE-TIME:20200713T093000Z DTEND;VALUE=DATE-TIME:20200713T100000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1010@indico.inp.nsk.su DESCRIPTION:Speakers: Oleg Shevchenko (BINP)\nThe Novosibirsk FEL facility includes three FELs operating in terahertz\, far- and mid- infrared spect ral ranges. It has rather long history but its potential is not fully reve aled so far. The first FEL of this facility has been operating for users o f terahertz radiation since 2004. It still remains being the world’s mos t powerful sources of coherent narrow-band radiation in its wavelength ran ge (90 – 340 μm). The second FEL was commissioned in 2009. Now it oper ates in the range of 35 - 80 μm but in near future we plan to replace its undulator with a new one and its short wavelength boundary will be shifte d down to 15 μm. The third FEL was commissioned in 2015 to cover the wave length range of 5 – 20 μm. Its undulator comprises three separate secti ons. Such lattice suits very well to demonstrate the new off-mirror way of radiation outcoupling in FEL oscillator (so called electron outcoupling) which we also plan to do in near future. We also intend to improve the acc elerator injection system. The result of this improvement will be increasi ng of the average electron beam current and consequently increasing of all three FELs radiation power. In this paper we present overview of the faci lity and discuss our recent achievements and future plans.\n\nhttps://indi co.inp.nsk.su/event/24/contributions/1010/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1010/ END:VEVENT BEGIN:VEVENT SUMMARY:Scientific opportunities at the first 4th generation high energy s ynchrotron radiation source DTSTART;VALUE=DATE-TIME:20200713T084000Z DTEND;VALUE=DATE-TIME:20200713T091000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1908@indico.inp.nsk.su DESCRIPTION:Speakers: Harald Reichert (European Synchrotron Radiation Faci lity)\nhttps://indico.inp.nsk.su/event/24/contributions/1908/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1908/ END:VEVENT BEGIN:VEVENT SUMMARY:Multichannel THz telecommunication based on mode division multiple xing (MDM) approach DTSTART;VALUE=DATE-TIME:20200714T073000Z DTEND;VALUE=DATE-TIME:20200714T080000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1903@indico.inp.nsk.su DESCRIPTION:Speakers: Vladimir Pavelyev ()\nThe present talk is devoted to the use of beams with orbital angular momentum (OAM) [1] for development THz multichannel systems based on the mode division multiplexing (MDM) app roach. The work [2] shows the results of the feasibility study of organizi ng a multichannel terahertz (THz) communication system based on controllin g the transverse-mode composition of a coherent beam of terahertz radiatio n. In [1\,2]\, however\, it was only a question of changing the transverse mode composition without changing the polarization state of the illuminat ing beam.\nIn the long run\, the development of methods for simultaneous c ontrol of the transverse mode composition and polarization state of a tera hertz beam will allow developing multichannel terahertz telecommunication systems with high information capacity. In the work [3]\, the authors desi gned\, produced\, and examined a subwavelength axicon for converting linea rly polarized terahertz radiation into a cylindrically polarized beam. In the present talk perspectives of application of terahertz non-uniformly po larized beams for telecommunication are also considered.\nThis work was su pported by the RF Ministry of Science and Higher Education under the gover nment project of the FSRC “Crystallography and Photonics” and by the R ussian Foundation for Basic Research (grant 19-07-00423). The experiments were performed at the Shared Research Center SSTRC based on the Novosibirs k FEL. \n\n\n[1] Yu.Yu. Choporova\, B.A. Knyazev\, G.N. Kulipanov\, V.S. Pavelyev\, M.A. Scheglov\, N.A. Vinokurov\, B.O. Volodkin\, V.N. Zhabin\, “High-power Bessel beams with orbital angular momentum in the terahertz range”\, Physical Review A\, vol. 96(2)\, 023846\, 2017.\n[2] Y.Y. Chop orova\, B.A. Knyazev\, N.D. Osintseva\, V.S. Pavelyev\, K.N. Tukmakov\, “Two-channel terahertz communication based on spatial mode multiplexing\ , Proceedings of 44th International Conference on Infrared\, Millimeter\, and Terahertz Waves”\, IRMMW-THz\, 2019.\n[3] S.N. Khonina\, K.N. Tukmak ov\, S.A. Degtyarev\, A.S. Reshetnikov\, V.S. Pavelyev\, B.A. Knyazev\, Yu .Yu. Choporova\, “Design\, fabrication and investigation of a subwavelen gth axicon for terahertz beam polarization transforming”\, Computer Opti cs\, vol. 43(5)\, pp.756-764\, 2019.\n\nhttps://indico.inp.nsk.su/event/24 /contributions/1903/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1903/ END:VEVENT BEGIN:VEVENT SUMMARY:Recent experiments in Terahertz Photonics\, Plasmonics\, and Spect roscopy at the Novosibirsk Free Electron Laser Facility DTSTART;VALUE=DATE-TIME:20200714T070000Z DTEND;VALUE=DATE-TIME:20200714T073000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1803@indico.inp.nsk.su DESCRIPTION:Speakers: Boris Knyazev ()\nA review is given of the experimen ts in the field of photonics and plasmonics\, recently performed on the No vosibirsk free electron laser (NovoFEL). The parameters of NovoFEL radiati on and user workstations are described. Considerable attention is paid to the development and testing of quasi-optical elements designed for this ra nge and to methods for the formation of powerful beams of terahertz radiat ion with a given mode composition. The use of terahertz radiation in the s pectroscopy of gases and semiconductors\, in the generation and study of s urface plasmon polaritons\, as well as the use of the latter for the study of surfaces and in the communication applications\, are described.\nThe w ork was supported in parts by the RFBR grant No. 15-02-06444 and the RSF g rant No. 19-12-00103.\n\nhttps://indico.inp.nsk.su/event/24/contributions/ 1803/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1803/ END:VEVENT BEGIN:VEVENT SUMMARY:EPR spectroscopy station at the Novosibirsk Free Electron Laser: a pplication of high-power THz radiation in the field of molecular magnetism DTSTART;VALUE=DATE-TIME:20200714T100000Z DTEND;VALUE=DATE-TIME:20200714T102000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1007@indico.inp.nsk.su DESCRIPTION:Speakers: Sergey Veber (International Tomography Center SB RAS )\nIn this work we present the current status of CW and TR EPR station at NovoFEL [1]. The detailed layout of the experimental user station is shown and discussed. While the CW and TR EPR X-band (9 GHz) spectrometer used i s almost the same as in many EPR laboratories\, it was built in the NovoFE L beamline and allows performing the unique EPR experiments with simultane ous irradiation of the sample by common UV-vis and exceptional NovoFEL lig ht. For this purpose\, multimodal THz waveguide allowing to fed NovoFEL ra diation directly into the EPR resonator is used. Laser radiation of NovoFE L is passed through the collimator based on two off-axis parabolic mirrors which compress the beam diameter by a factor of 15 adjusting it to the ap erture of THz waveguide used in EPR spectrometer. Electronic modulation sy stem for NovoFEL radiation is used to decrease the average power by a fact or of 100 or even higher while keeping the maximum accessible peak power[2 ]. Passed through the collimator and optical chopper\, the NovoFEL radiati on can be readily directed to the sample into EPR resonator. Different det ection schemes of experiments conditioned by the initial time profile of N ovoFEL radiation\, its electronic modulation and the capability (CW and TR ) of EPR spectrometer used are discussed. Special attention is drawn to th e heat effect and its practical use for the temperature-modulated detectio n of very broad EPR spectra [3]. \n \nReferences \n \n[1] G.N. Kulip anov\, E.G. Bagryanskaya\, et al.\, IEEE T THz Sci Techn\, 2018\, 5\, 798. \n \n[2] S.L. Veber\, S.V. Tumanov\, et al.\, J Magn Reson\, 2018\, 28 8\, 11. \n \n[3] O.A. Shevchenko\, A.R. Melnikov\, et al.\, Materials 2 019\, 12\, 3063. \n \nAcknowledgements \n \nThis work has been suppo rted by the Russian Science Foundation (no. 17-13-01412).\n\nhttps://indic o.inp.nsk.su/event/24/contributions/1007/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1007/ END:VEVENT BEGIN:VEVENT SUMMARY:MODELING OF TERAHERTZ SURFACE PLASMON FOURIER SPECTROMETER DTSTART;VALUE=DATE-TIME:20200714T102000Z DTEND;VALUE=DATE-TIME:20200714T104000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1022@indico.inp.nsk.su DESCRIPTION:Speakers: Vasily Gerasimov (Budker Institute of Nuclear Physic s of the Siberian Branch of RAS\, Novosibirsk)\nThe report presents the re sults of research to assess the possibility of creating a terahertz (THz) Fourier spectrometer\, the information carrier in which is surface plasmon -polaritons (SPPs) generated by a broadband radiation source. The key node of the spectrometer is the Michelson surface plasmon interferometer\, whi ch uses flat mirrors and plates for reflection and splitting SPP beams. Th e main distinctive feature of the spectrometer is the formation of interfe rograms by surface plasmons themselves\, and not by bulk waves\, one of wh ich is generated by the SPP beam. The transition from bulk-wave optics to planar optics will not only reduce the size of the device in comparison wi th analogues\, but will also improve the measurement accuracy due to elimi nation of the necessity to account for changes in the amplitudes and phase s of the harmonic component of the THz radiation with its conversion into the surface waves and Vice versa\; furthermore\, a manifold increase in th e number of recorded interferograms at different distances run by the SPPs inherent to the interferometer will contribute to the increase of accurac y of measurements as well. This work is partially supported by RFBR grant №19-02-00353.\n\nhttps://indico.inp.nsk.su/event/24/contributions/1022/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1022/ END:VEVENT BEGIN:VEVENT SUMMARY:Status of the studies of thermal stresses and deformations in mate rials caused by pulsed heat loads in BINP DTSTART;VALUE=DATE-TIME:20200714T082000Z DTEND;VALUE=DATE-TIME:20200714T084000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1842@indico.inp.nsk.su DESCRIPTION:Speakers: Aleksey Arakcheev ()\nThe operation of fusion reacto r on the base of tokamak geometry of magnetic field is expected to be acco mpanied by pulsed heat loads to divertor. The loads lead to formation of p lastic deformations and residual mechanical stresses. The stresses may res ult in mechanical destruction of tungsten armor of divertor. Typically it appears as a crack formation. The cracks decreases the heat removal from t he surface\, spoils the geometry of plasma flow to divertor\, make easier the formation and ejection of micro particles\, etc. The optical and X-ray diagnostics are applied to studies of the stresses and deformations in tu ngsten caused by pulsed heat loads in Budker Institute.\nThe optical diagn ostics are applied at the facility BETA (Beam of Electrons for material Te st Application). The measuring of thermal radiation and scattered on the s urface laser radiation during pulsed heating gives information about the s urface temperature\, roughness and curvature of the surface\, etc. Among t he most significant discoveries made using these diagnostics\, we can note the detection of a delay between the end of the pulse heating and the for mation of cracks by several orders of magnitude compared to the expected v alues. Recently\, a new optical diagnostic has been developed\, which allo ws determining the radius of curvature of the surface by changing the foca l length. The results of the diagnostics confirmed the previous results on the delay. In addition\, measuring the dynamics of surface curvature allo ws calculating the distribution of deformations and stresses along the dep th of the sample. Of course\, the results of such calculations depend on t he applied strain models.\nThe more direct methods for measuring residual stresses are used at stations of X-ray scattering «Precision diffractomet ry and anomalous scattering» and «Diffraction "movie"» at the VEPP-3 so urce of synchrotron radiation. The residual stresses may be calculated usi ng the dependence of the scattering angle on the inclination of the sample . The station «Precision diffractometry and anomalous scattering» was us ed to make measurements of residual stresses with the spatial distribution s. The decreasing of residual stress during slow heating simulating the re sult of continual heating of divertor was measured at the station «Diffra ction "movie"».\nThe station of X-ray radiation «Plasma» at the VEPP-4 source of synchrotron radiation is oriented to measurements of deformation s and mechanical stresses in during pulsed heating simulating by laser rad iation. The previous experiments demonstrated the possibility of the measu rements of the depth distribution of deformations in single-crystal tungst en with the time resolution about 10 μs. The first demonstrative experime nts on the measurements of the diffraction on polycrystall tungsten were c arried out. The acceptable magnitude of signal were measured with the whol e exposure 150 ms. The time resolution is admissible for measurements of the dynamic of the stress between the pulsed heating and crack formation.\ n\nhttps://indico.inp.nsk.su/event/24/contributions/1842/ LOCATION: Zoom 890 9721 5207 URL:https://indico.inp.nsk.su/event/24/contributions/1842/ END:VEVENT BEGIN:VEVENT SUMMARY:The conduction band of the lanthanide doped chromium disulfides Cu Cr0.99Ln0.01S2 (Ln=La\, Ce\, Gd): XANES investigations DTSTART;VALUE=DATE-TIME:20200715T074000Z DTEND;VALUE=DATE-TIME:20200715T080000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1807@indico.inp.nsk.su DESCRIPTION:Speakers: Evgeniy Korotaev (Nikolaev Institute of Inorganic Ch emistry of the Siberian Branch of the Russian Academy of Sciences)\nThe s olid solution based on the copper chromium disulfide CuCrS2 are promising functional materials for modern electronics applications. These compounds exhibit the potential properties for practical usage: the thermoelectric p roperties [1]\, the ionic conductivity [2]\, the helimagnetic arrangement [3-4]\, the colossal magnetoresistance and the phase metal-insulator trans ition [4].\nThere are several approaches to control the electric and magne tic properties of CuCrS2-based compounds: the cationic substitution of chr omium atoms with transition metal atoms (CuCr1-xMxS2\, M = V\, Fe\, Mn)\, the co-intercalation of the Van der Waals gap with two atom types (Cu1-xAg xCrS2) and the chalcogen substitution (CuCrS2\, X = S\, Se\, Te). It was s hown that the low dopant solid solutions CuCr1-xMxS2 exhibit promising the rmoelectric properties. The key aspect to control the electrophysical prop erties of thermoelectric materials is the understanding of the electronic structure features. The corresponding data could be obtained from both the quantum-chemical calculations and the experimental techniques sensitive t o the electronic structure. In this regard\, the study of the X-ray absorp tion edges near edge structure (XANES) features could provide useful infor mation about the conduction band structure. Thus\, this study involves a p urposeful synthesis of the lanthanide doped solid solutions CuCr0.99Ln0.01 S2 (Ln=La\, Ce\, Gd) and detailed study of their electronic and band struc ture. A comprehensive experimental and theoretical study of the X-ray abso rption edges of the matrix elements and doped-lanthanide atoms in the cati on-substituted disulfides CuCr0.99Ln0.01S2 was carried out. Based on the o btained results\, the cationic substitution with lanthanide atoms affect t o the conduction band structure was studied.\nThe study was carried out wi th a funding from the Russian Science Foundation (project No. 19-73-10073) . The software program design for the experimental XANES spectra shape cor rection was supported by RFBR grant №16-32-00612.\n [1] Korotaev E.V\, S yrokvashin M.M.\, I.Yu. Filatova\, et al. // J. Electron. Mater. -2018.-47 . –p. 3392-3397. \n[2] Akmanova G.R.\, Davleshina A.D.\, // Lett.Mater.- 2013.- 3. –p.76-78.\n[3] Karmakar A.\, Dey K.\, Chatterjee S. et al. // Appl. Phys. Letters. – 2014. –104\, N. 5. – P. 052906.\n[4] Abramova G.M.\, Petrakovskii G.A. // Low Temperature Physics. – 2006. – 32\, N . 8/9. – p. 954-967.\n\nhttps://indico.inp.nsk.su/event/24/contributions /1807/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1807/ END:VEVENT BEGIN:VEVENT SUMMARY:In situ XRD analysis with the time-resolution (0.4 ms) of stainles s steel in during selective laser melting. DTSTART;VALUE=DATE-TIME:20200715T080000Z DTEND;VALUE=DATE-TIME:20200715T082000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1859@indico.inp.nsk.su DESCRIPTION:Speakers: Konstantin Kuper ()\nSelective laser melting is an a dditive technology that is gaining popularity due to its ability to produc e complex metal components that cannot be manufactured using traditional t echnologies.To achieve high quality components created using SLM\, it is n ecessary to control the processes of melting and subsequent crystallizatio n in metals. Using the high synchrotron radiation (SR) intensity from a 9- pole wiggler (VEPP-4M)\, we obtained data on phase transformations in AISI 304 stainless steel with a time resolution of 0.4 ms. For SLM\, we used a 500 W ytterbium fiber laser with a wavelength 1070 nm. \, The work was pe rformed on the SR beamline "Phase Contrast Radiography"\, created with th e support of the RFBR project No. 12-02-12071\n\nhttps://indico.inp.nsk.su /event/24/contributions/1859/ LOCATION: Zoom 890 9721 5207 URL:https://indico.inp.nsk.su/event/24/contributions/1859/ END:VEVENT BEGIN:VEVENT SUMMARY:On the efficiency of backward collinear acousto-optic interaction between terahertz radiation and acoustic beam in hexane DTSTART;VALUE=DATE-TIME:20200714T120000Z DTEND;VALUE=DATE-TIME:20200714T122000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1851@indico.inp.nsk.su DESCRIPTION:Speakers: Pavel Nikitin (Scientific and Technological Center o f Unique Instrumentation of RAS)\nOne of the leading areas in telecommunic ation technology is the development of high-speed devices. At present\, th e use of the acousto-optical (AO) effect to control radiation is promising . Devices based on this effect are used in the ultraviolet\, visible and i nfrared ranges. One of the main problems of using the AO effect in the ter ahertz (THz) range is the low diffraction efficiency (four orders of magni tude less than in the visible range) due to an increase in the radiation w avelength. This work is devoted to modeling the operation of the AO filter of a THz radiation\, in which the collinear geometry of the interaction o f the radiation beam with the ultrasound beam is used. In contrast to the well-known works in which the sound beam was assumed to be homogeneous and the chalk plane wave front\, we used the model structure of the sound bea m. The nonpolar liquid hexane (C6H14) was chosen as the AO interaction med ium\, since it is characterized by acceptable values ​​of transparency and attenuation of ultrasound.\nThe work was supported by RSF grant No.18 -12-00430.\n\nhttps://indico.inp.nsk.su/event/24/contributions/1851/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1851/ END:VEVENT BEGIN:VEVENT SUMMARY:THz nonlinear electronic response in GaAs/InGaAs semiconductor nan owires DTSTART;VALUE=DATE-TIME:20200714T083000Z DTEND;VALUE=DATE-TIME:20200714T090000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1902@indico.inp.nsk.su DESCRIPTION:Speakers: Harald Schneider (Helmholtz-Zentrum Dresden-Rossendo rf)\nThis presentation reviews some recent experiments using free-electron -laser-based narrow-band as well as tabletop-laser-based single-cycle tera hertz (THz) fields for exploring electronic properties in semiconducting G aAs/InGaAs core/shell nanowires (NW) [1]. In undoped NW\, charge carriers are optically excited by near-infrared pulses and probed by strong single- cycle THz fields up to 0.6 MV/cm. The photoexcited charge carriers exhibit a pronounced plasmon resonance\, which undergoes a systematic redshift an d a suppression of its spectral weight\, which indicates a drop of the ele ctron mobility at the highest fields to about half of the original value [ 2]. In n-type NWs\, intense narrowband THz excitation causes a nonlinear p lasmonic response\, which manifests itself by a similar pronounced red shi ft of the plasma resonance. This nonlinearity is investigated by scatterin g-type scanning near-field infrared microscopy on individual NWs. For NW d oped with Si to a concentration of 9x10^18 cm^-3\, a spectrally sharp plas ma resonance\, located at a photon energy of 125 meV for weak excitation\, undergoes a power-dependent redshift to about 95 meV [3]. In these experi ments\, the observed behavior is attributed to a pronounced increase of th e average electron effective mass caused by transient carrier heating and electron intervalley transfer. The results quantify the nonlinear transpor t regime in GaAs-based nanowires and show their high potential for develop ment of nanodevices operating at THz frequencies.\n[1] L. Balaghi et al.\, Widely tunable GaAs band gap via strain engineering in core/shell nanowir es\, Nature Comm. 10\, 2793 (2019)\n[2] R. Rana et al.\, Nonlinear teraher tz field-induced charge transport and transferred-electron effect in InGaA s nanowires\, Nano Lett. 20\, 3225 (2020)\n[3] D. Lang et al.\, Nonlinear plasmonic response of doped nanowires observed by infrared nanospectroscop y\, Nanotechnol. 30\, 084003 (2019)\n\nhttps://indico.inp.nsk.su/event/24/ contributions/1902/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1902/ END:VEVENT BEGIN:VEVENT SUMMARY:Two stage shock wave processes in construction materials DTSTART;VALUE=DATE-TIME:20200714T070000Z DTEND;VALUE=DATE-TIME:20200714T073000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1910@indico.inp.nsk.su DESCRIPTION:Speakers: Evgeniy Smirnov (Russian Federal Nuclear Center - VN IITF)\nhttps://indico.inp.nsk.su/event/24/contributions/1910/ LOCATION: Zoom 890 9721 5207 URL:https://indico.inp.nsk.su/event/24/contributions/1910/ END:VEVENT BEGIN:VEVENT SUMMARY:Status of detonation experimentat VEPP-3/VEPP-4 DTSTART;VALUE=DATE-TIME:20200714T073000Z DTEND;VALUE=DATE-TIME:20200714T080000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1911@indico.inp.nsk.su DESCRIPTION:Speakers: Edward Pruuel ()\nhttps://indico.inp.nsk.su/event/24 /contributions/1911/ LOCATION: Zoom 890 9721 5207 URL:https://indico.inp.nsk.su/event/24/contributions/1911/ END:VEVENT BEGIN:VEVENT SUMMARY:Complex Dynamic Study of ejection of the of Particles from Shock-L oaded Tin by SR methods\, a PDV laser complex\, and optical and piezoelect ric sensors. DTSTART;VALUE=DATE-TIME:20200714T084000Z DTEND;VALUE=DATE-TIME:20200714T090000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1029@indico.inp.nsk.su DESCRIPTION:Speakers: Konstantin Ten (LIH SB RAS)\nAt fast acceleration of metals\, a cloud of microparticles (dust cloud) appears in front of the s urface. Work on the study of these processes using Synchrotron Radiation ( SR) was carried out at the Budker Institute of Nuclear Physics (Novosibirs k) [1\,2]. \nIn this work\, the particle flux from shock-loaded tin was recorded using X-ray radiography\, but also synchronously with another 4-c hannel Photon Doppler Velocimetry (PDV) laser complex and piezoelectric se nsors. \nThe use of piezosensors and laser complexes PDV is widely used due to the availability and simplicity of obtaining information on the dyn amic flows of microparticles. It is advisable to use these techniques in c onjunction with other techniques that can evaluate mass and flow rates. Th e use of SR radiography is an ideal complement to them. Comparison of data on the flow of microparticles (speed and mass distributions) with the mag nitude of the signal from the piezoelectric sensor makes it possible to in dependently calibrate the sensor readings. The simultaneous use of modern techniques has allowed not only to measure the mass distribution along the cloud\, but also significantly increase the reliability of the measured v alues. \nThe flows of microparticles from grooves (roughnesses) with siz es from Rz4 to Rz80 made on the surface of tin were investigated. The shoc k wave was created by pressed octogen. The data obtained are necessary for the numerical simulation of particle ejection processes. \n \n1\\. K.A . Ten\, E.R. Pruuel\, A.O. Kashkarov\, I.A. Rubtsov\, M.V. Antipov\, A.B. Georgievskaya\, A.L. Mikhailov\, I.A. Spirin\, V.M. Aulchenko\, L.I. Shekh tman\, V.V. Zhulanov\, B.P. Tolochko . Detection of Particle Ejection from Shock-Loaded Metals by Synchrotron Radiation Methods. // Combustion\, Exp losion\, and Shock Waves. Vol. 54. No. 5. pp. 606-613\, 2018. \n2\\. K A Ten\, E R Pruuel\, A O Kashkarov\, I A Rubtsov\, M V Antipov\, A B Georgi evskaya\, A L Mikhailov\, I A Spirin\, L I Shekhtman\, V V Zhulanov and B P Tolochko. Dynamic registration of ejection from shock-loaded metals // J ournal of Physics: Conference Series\, Volume 1147\, (2019) 012020 doi:10. 1088/1742-6596/1147/1/012020\n\nhttps://indico.inp.nsk.su/event/24/contrib utions/1029/ LOCATION: Zoom 890 9721 5207 URL:https://indico.inp.nsk.su/event/24/contributions/1029/ END:VEVENT BEGIN:VEVENT SUMMARY:Detectors for fast time-resolved studies at SSTRC\, status and fut ure DTSTART;VALUE=DATE-TIME:20200714T090000Z DTEND;VALUE=DATE-TIME:20200714T092000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1778@indico.inp.nsk.su DESCRIPTION:Speakers: Lev Shekhtman ()\nThe detector developments for fast and super-fast time-resolved studies at SR beams will be reviewed. Two de tectors based on Si micro-strip technology are developed at present at Bud ker INP SB RAS. The detector for imaging of super-fast processes at a nano second scale\, DIMEX-Si allows to improve by more than a factor of ten max imum detected photon flux\, with respect to the gaseous version of such de tector\, that is operating at VEPP-3 for more than 15 years\; the frame ra te is increased up to 50 MFr/s and spatial resolution is improved to about 50 microns. The new full-size detector prototype for the studies of tungs ten deformations under pulse heat load in a microsecond scale is recently developed. Its has significantly better spatial resolution and sensitivity compared to the DIMEX-G detector that was used for these studies before. \n\nPart of the work reviewed in this presentation related to the measurem ents with the prototype of the DIMEX-Si detector is supported by the RFBR grant No.19-42-540006.\n\nhttps://indico.inp.nsk.su/event/24/contributions /1778/ LOCATION: Zoom 890 9721 5207 URL:https://indico.inp.nsk.su/event/24/contributions/1778/ END:VEVENT BEGIN:VEVENT SUMMARY:In situ synchrotron x-ray diffraction study of face-centered cubic platinum hydride and phase diagram of PtH DTSTART;VALUE=DATE-TIME:20200714T121000Z DTEND;VALUE=DATE-TIME:20200714T123000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1821@indico.inp.nsk.su DESCRIPTION:Speakers: Anna Semerikova (Novosibirsk State University)\nRece nt extensive research on high-temperature superconductivity in compressed binary hydrogen-rich compounds generat-ed a large corpus of phase stabilit y calculations with an evident lack of their experimental verification. Pt -H system at high pressure represent a typical example of inconsistency be tween computational approach\, which predicted stability of eight PtH stru ctures\, and experiments revealing the existence of only two modifications : hexagonal close-packed (hcp) PtH (alt-hough at drastically lower pressur es than predicted)\, and trigonal PtH (not foreseen by ab initio calculati ons). Of particular interest is face-centered cubic (fcc) platinum hydride - a product of hydrogen intercalation into the native structure of fcc Pt . This phase was predicted to be nearly isoentalpic to the hcp PtH and sta ble between 93 and 105 GPa\, but has been never observed experimentally. H ere we report the first synthesis of the fcc PtH using laser heated diamon d anvil cell. The fcc plat-inum hydride was found to occupy high-temperatu re area of the phase diagram in a wide pressure range of 20 – 100 GPa. I t can be quenched\, although with partial transformation into the hcp phas e\, thus being metastable at room temperature. Our results look promising for uncovering weak approximations in current ab initio approaches\, used for computational model-ling of high-pressure hydrides stability. Moreover \, here we clarify the view on the inertness of Pt as a heat absorber in l aser-heating high-pressure experiments with hydrogen-containing systems.Th e research was carried out at PETRA III (DESY)\, Р02.2 Extreme conditions beamline\, proposal #I-20180048. \nThis work was supported by RFBR grant №18-35-20047.\n\nhttps://indico.inp.nsk.su/event/24/contributions/1821/ LOCATION: Zoom 890 9721 5207 URL:https://indico.inp.nsk.su/event/24/contributions/1821/ END:VEVENT BEGIN:VEVENT SUMMARY:Calculation of thermal loads of X-ray mirror optics of a synchrotr on radiation source SKIF DTSTART;VALUE=DATE-TIME:20200713T142500Z DTEND;VALUE=DATE-TIME:20200713T142600Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1804@indico.inp.nsk.su DESCRIPTION:Speakers: Nikolay Razumov (Институт химии тве рдого тела и механохимии Со РАН)\nThe work is de voted to the problem of the occurrence of large thermal loads on x-ray opt ics when it is irradiated with a 69 kW synchrotron radiation beam from a s uperconducting wiggler installed on a SKIF synchrotron radiation source. T he task was to reduce the temperature gradient on the surface of the mirro r\, which lead to mechanical thermal stresses and\, consequently\, to geom etric distortions of X-ray mirrors.\nThe task of this work was: 1) calcula tion of the thermal load on X-ray mirror optics when it is irradiated with a synchrotron radiation beam with a power of about 80 kW\, which leads to a temperature gradient and\, accordingly\, to mechanical thermal stresses \, which lead to geometric distortions of X-ray mirrors\; 2) choosing the geometry of the cooling system\; 3) choosing a refrigerant for the cooling system\; 4) optimization of the exposure time of x-ray mirror optics of t he experimental station "Fast processes"\; 5) conducting test (calibration ) experiments to study the heating of elements of X-ray mirror optics on b eams of synchrotron radiation from the wiggler of the VEPP-4 accelerator.\ nIn this work\, we simulate the heating of an X-ray mirror for synchrotron radiation from the SKIF superconducting wiggler\, as well as for the VEPP -4M wiggler. The beam characteristics\, such as power\, divergence\, and s patial distribution\, are calculated. In the calculation of the emission s pectrum\, the SPECTRA program was used. To calculate the passage of synchr otron radiation through the material of filters and mirrors\, as well as t o calculate the reflected spectrum from the mirror at the angle of total e xternal reflection\, the XOP 2.3 program was used. Using the data obtained \, the distribution of the thermal power of the beam in the near-surface l ayer of the mirror was simulated. Further\, using the obtained distributio n and the ANSYS Workbench program\, the local heating of the X-ray mirror under various modeling conditions was calculated\, which made it possible to construct a map of the temperature distribution over the mirror surface .\nA control experiment was carried out to measure the surface temperature of a mirror when irradiated with a SI beam from a VEPP-4 wiggler. This ma de it possible to verify the calculations performed by the ANSYS Workbench codes. In the case of VEPP-4M\, the mirror was cooled convectively by air .\nFor the SKIF wiggler\, computer simulation of radiation heating of a mi rror was calculated for various cases\, both of the cooling geometry and o f various refrigerants\, including liquid nitrogen.\n\nhttps://indico.inp. nsk.su/event/24/contributions/1804/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1804/ END:VEVENT BEGIN:VEVENT SUMMARY:PDF analysis of alumina containing systems DTSTART;VALUE=DATE-TIME:20200714T123000Z DTEND;VALUE=DATE-TIME:20200714T125000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1841@indico.inp.nsk.su DESCRIPTION:Speakers: Kristina Shefer (Boreskov Institute of Catalysis SB RAS)\nAlumina containing systems are of great significance for catalysis d ue to the unique properties of this oxide. These systems usually exist in nanoscale state. Their composition and physicochemical properties depend o n the preparation conditions. The appearance of novel methods of alumina s ynthesis give a new stimulus to the study of their structure and propertie s. Therefore such substances are interesting objects for research.\nThe mo st reliable structural information is extracted from direct structural dif fraction methods. In the case nanoscale catalytic systems\, using special methods which take into account the specific features of X-ray scattering from small objects is required. In this work\, structural features of alum inа-containing systems are examined using PDF method. Applying this metho d needs obtaining diffraction data in a wide range of angles and with high intensity. X-ray diffraction patterns for constructing the experimental c urves were obtained on a high-resolution diffractometer at the Siberian Sy nchrotron and Terahertz Radiation Center (Institute of Nuclear Physics\, S B RAS? Novosibirsk). The considered aluminum oxides were obtained by diffe rent methods with varying synthesis parameters: deposition method\, alumin ate method\, sol-gel method\, CTA method. \nThe work was supported by Russ ian Foundation for Basic Research (project #19-03-00595) and by Ministry o f Science and Higher Education of the Russian Federation (project # ААА А-А17-117041710079-8).\n\nhttps://indico.inp.nsk.su/event/24/contributio ns/1841/ LOCATION: Zoom 890 9721 5207 URL:https://indico.inp.nsk.su/event/24/contributions/1841/ END:VEVENT BEGIN:VEVENT SUMMARY:Experimental and theoretical X-ray spectroscopic study of electron ic structure of sulfur-contained transition metal complexes DTSTART;VALUE=DATE-TIME:20200715T103000Z DTEND;VALUE=DATE-TIME:20200715T105000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1861@indico.inp.nsk.su DESCRIPTION:Speakers: Anastasiya Fedorenko (NIIC SB RAS)\nTasks arising wi th the growing need for alternative renewable energy sources and environme ntally pure catalytic technologies stimulate the search for new functional materials. At present\, growing interest is in compounds containing chalc ogenide and dichalcogenide groups\, which may perform as active catalytic centers. In this regard\, binuclear and trinuclear transition metal cluste rs modified with various terminal ligands have great prospects as catalyst s or precursors with higher catalytic activity\, and could be considered c onvenient structural models of active centers of industrial catalysts. The coordination of terminal ligands of various nature affects the electronic structure of clusters\, which could improve functional properties such as nonlinear optical properties\, reactivity\, and other physicochemical pro perties.\nAn important issue in obtaining new functional materials is the characterization of their atomic and electronic structures. Thus\, the ele ctrocatalytic activity of materials based on dichalcogenide molybdenum clu sters or MoS2 nanoparticles with different morphologies is associated with a large number of disulfide groups in the catalyst structure. X-ray spect roscopy provides information about both the atomic and the electronic stru cture of the studied compounds.\nIn the present work\, the electronic stru cture of a series of binuclear and trinuclear transition metal clusters wi th disulfide and sulfide ligands was studied by X-ray spectroscopy methods . The S K-edge\, S L2\,3-edge XANES spectra\, and S Kβ\, M Lβ X-ray emis sion spectra of complexes with various cluster core ({M2S4}\, {M3S7}\, {M3 S4}\, M = Mo\, Nb\, V\, W) were studied. Based on quantum chemical calcula tions\, the X-ray absorption and X-ray emission spectra of sulfur atoms we re interpreted\, providing information on the energy position and partial atomic composition of the HOMOs and LUMOs\, and the electron density distr ibution in the clusters under study. Based on the obtained experimental an d theoretical data\, the effect of external sphere ligands on the nature o f the electronic interactions of cluster core\, the electronic structure o f bridge sulfide and disulfide ligands was studied. The electronic structu res of transition metal disulfides and disulfide clusters were compared.\n This work was supported by RFBR grant № 18-03-01061a.\nThe work was done at the shared research center SSTRC on the basis of the Novosibirsk FEL/V EPP-4 - VEPP-2000 complex at BINP SB RAS\, using equipment supported by pr oject RFMEFI62119X0022.\n\nhttps://indico.inp.nsk.su/event/24/contribution s/1861/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1861/ END:VEVENT BEGIN:VEVENT SUMMARY:X-RAY PHOTOELECTRON SPECTROSCOPY AND NEAR EDGE X-RAY ABSORPTION FI NE STRUCTURE SPECTROSCOPY STUDY OF SYNCHROTRON RADIATION EFFECTS ON FLUORI NATED GRAPHITE INTERCALATED N2O4 DTSTART;VALUE=DATE-TIME:20200715T105000Z DTEND;VALUE=DATE-TIME:20200715T111000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1867@indico.inp.nsk.su DESCRIPTION:Speakers: Galina Semushkina (Nikolaev Institute of Inorganic C hemistry)\nFluorinated graphite (FG) attracts the attention of researchers due to a wide range of physicochemical properties\, which is promising fo r its use as an element base of microelectronic devices (LED elements\, ga s sensors\, etc.)\, and also as a cathode for lithium-ion batteries. More importantly\, recent studies have shown that intercalated systems based on graphite and its derivatives can be used as a nanoreactor. In these devic es\, the layering of graphite and its screening effect allows you to purpo sefully change the reactivity of molecules and regulate the activity of fu nctional groups on the surface. In addition\, the subsequent thermal or ph otochemical treatment of fluoride graphite intercalated compound (FGIC)\, including irradiation with high-intensity light\, can lead to a significan t restructuring of the electronic structure of the system\, which opens up new possibilities for using FG.\nFor the purpose of a detailed analysis o f the mechanism of processes occurring on the surface of FGIC under the in fluence of thermal and photochemical effects\, a comprehensive study of th e electronic structure of intercalated N2O4 fluorinated graphite С2F0.8-0 .9 before and after continuous in situ illumination with polychromatic pho ton beam of high intensity (zero-order light from the dipole beamline of B ESSY II synchrotron radiation facility). X-ray photoelectron spectroscopy (XPS)\, near-edge X-ray absorption fine structure (NEXAFS)\, and Fourier t ransform infrared spectroscopy (FTIR) are used for this. \nThus\, the effe ct of synchrotron radiation on the atomic and electronic structure of FGIC C2F0.8-0.9 N2O4 has been studied. It was found that in the initial sample s of N2O4 on the surface\, the FG is in an equilibrium mixture with variou s nitrogen-containing functional groups NO2\, NO\, NO3\, N2. Thermal and p hotochemical effects on FGIC lead to defluorination of the sample and the formation of defects\, on the edge of which CF2 and CF3 bonds arise. In ad dition\, the FG matrix recovery in progress with partial removal of the in tercalate.\nThis work was supported by RFBR grant № 18-29-19073 мк.\n\ nhttps://indico.inp.nsk.su/event/24/contributions/1867/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1867/ END:VEVENT BEGIN:VEVENT SUMMARY:Search for and analysis of composition and structure of submicron- size particles in geological samples DTSTART;VALUE=DATE-TIME:20200715T111000Z DTEND;VALUE=DATE-TIME:20200715T113000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1823@indico.inp.nsk.su DESCRIPTION:Speakers: Fedor Darin (Budker Institute of Nuclear Physics SB RAS)\nA technique combining SR XRF\, XRF mapping\, μ-XRF\, and μ-XAFS fo r search for microparticles in different matrices and determination of par ticle size\, as well as analysis of their composition and structure\, has been developed at Budker Institute of Nuclear Physics. The technique is ba sed on comprehensive examination of sample with gradually increasing the s patial resolution and constricting the study area for locating the desired microparticle. The beam size for preliminary studies ranges from 1 mm to 100 um in height and 10 mm in width. The next stage is examination using X -ray optics (polycapillary lenses) with single-lens and confocal schemes. The apparatus function of each lens is measured\, which enables controlled variation of the focal spot size from 10 um to 70 um.\nThis multifacet te chnique was tested on search for and study of micro-inclusions of light pl atinum group metals (Ru and Pd) in Bushveld (South Africa) Intrusive Compl ex samples. An area with high concentration of Pd has been found. The part icle sizes (~ 50 um) have been identified. A localized particle was studie d using the μ-XAFS method. Forms of Pd stabilization in the particle have been established\; their structural parameters (interatomic distances and coordination numbers) have been determined. \nThe work was carried out in the framework of the state assignment for IGM SB RAS and RFBR projects no . 19-05-50046\, 18-03-01251. The work was done at the shared research cent er SSTRC on the basis of the VEPP-4-VEPP-2000 complex at BINP SB RAS\, usi ng equipment supported by project RFMEFI62119X0022.\n\nhttps://indico.inp. nsk.su/event/24/contributions/1823/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1823/ END:VEVENT BEGIN:VEVENT SUMMARY:Trends on Montel X-ray Optics and Pinholes for Synchrotron Beamlin es DTSTART;VALUE=DATE-TIME:20200715T092000Z DTEND;VALUE=DATE-TIME:20200715T094000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1909@indico.inp.nsk.su DESCRIPTION:Speakers: Jörg Wiesmann (Incoatec GmbH)\nDifferent kinds of X -ray mirrors are required for beam alignment\, guidance or monochromator a pplications. Therefore various types of optics with coatings for energy ra nges between 100 eV and 80 keV have been investigated. \nWe will show stri pe multilayer coatings which are often used as Double Crystal Multilayer M onochromators (DCMM) for example in tomography beamlines. The optics consi sts of up to 5 different coating stripes\, optimized for each energy range . \nWe will also present results of a 50 cm laterally graded multilayer op tics\, developed for special mini-synchrotrons with a deviation to a speci fied film shape of less than 0.2 %.\nWe will present new developments of M ontel Optics for synchrotron applications. Different types of these two-di mensional optics are used at DLS\, NSLS and APS and Riken\, for example in an analyzer system for inelastic scattering. One new 230 mm Montel Optic for 11215 eV was delivered a few months ago to ESRF for BL ID20.\nParasiti c aperture scattering causes loss in data quality especially in SAXS and G ISAXS ap-plications. Various measurement results will be presented showing the improvement of data quality with scatterless pinholes. These pinholes are either made of Germanium for energies 11.2 keV and are available wit h diameters from 2 mm down to 20 µm and below.\n\nhttps://indico.inp.nsk. su/event/24/contributions/1909/ LOCATION: Zoom 890 9721 5207 URL:https://indico.inp.nsk.su/event/24/contributions/1909/ END:VEVENT BEGIN:VEVENT SUMMARY:EIGER2 DETECTOR SYSTEMS: TOOLS FOR ADVANCED X-RAY STUDIES DTSTART;VALUE=DATE-TIME:20200715T110000Z DTEND;VALUE=DATE-TIME:20200715T112000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1795@indico.inp.nsk.su DESCRIPTION:Speakers: Stefan Brandstetter (DECTRIS Ltd.)\nIn the last deca de\, Hybrid Photon Counting (HPC) X-ray detectors [1] have transformed syn chrotron research. They provide noise-free detection and make new data acq uisition modes possible. The new HPC detector family EIGER2 enables even m ore ambitious X-ray science. These detectors combine all advantages of pre vious generations of HPC detectors\nwhile offering new features and improv ed performance: maximum count rates of $10^{7}$ photons per pixel\, two en ergy discriminating thresholds\, and zero readout dead time.\n\nThe system s have pixel sizes of 75 µm × 75 µm\, and feature frame rates up to 2 k Hz. EIGER2 detectors are available both with silicon and with CdTe sensors to provide high quantum efficiency at energies up to 100 keV. Two adjusta ble energy thresholds allow for reduction of high-energy background such a s from cosmic radiation or higher harmonics. These benefits advance establ ished methods like crystallography and small angle X-ray scattering and em power new fields of research\, such as X-ray photon correlation spectrosco py and coherent studies.\n\nWe will present results from detector characte rization and application experiments and show how EIGER2 detector systems enable further advances in X-ray micro- and nanoanalysis.\n\n**References* *\n[1] A. Förster et al.\, Philos. Trans. R. Soc. Math. Phys. Eng. Sci. 3 77\, 20180241 (2019)\,\ndoi:10.1098/rsta.2018.0241.\n\nhttps://indico.inp. nsk.su/event/24/contributions/1795/ LOCATION: Zoom 890 9721 5207 URL:https://indico.inp.nsk.su/event/24/contributions/1795/ END:VEVENT BEGIN:VEVENT SUMMARY:Introduction to the SKIF project DTSTART;VALUE=DATE-TIME:20200716T070000Z DTEND;VALUE=DATE-TIME:20200716T072000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1912@indico.inp.nsk.su DESCRIPTION:Speakers: Valerii Bukhtiyarov (BIC SB RAS)\nhttps://indico.inp .nsk.su/event/24/contributions/1912/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1912/ END:VEVENT BEGIN:VEVENT SUMMARY:First phase SKIF beamlines design DTSTART;VALUE=DATE-TIME:20200716T082000Z DTEND;VALUE=DATE-TIME:20200716T084000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1915@indico.inp.nsk.su DESCRIPTION:Speakers: Iakov Rakshun ()\nhttps://indico.inp.nsk.su/event/24 /contributions/1915/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1915/ END:VEVENT BEGIN:VEVENT SUMMARY:Second phase SKIF beamlines design DTSTART;VALUE=DATE-TIME:20200716T084000Z DTEND;VALUE=DATE-TIME:20200716T090000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1916@indico.inp.nsk.su DESCRIPTION:Speakers: Yan Zubavichus ()\nhttps://indico.inp.nsk.su/event/2 4/contributions/1916/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1916/ END:VEVENT BEGIN:VEVENT SUMMARY:Storage ring for Novosibirsk low emittance light source SKIF DTSTART;VALUE=DATE-TIME:20200716T072000Z DTEND;VALUE=DATE-TIME:20200716T074000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1913@indico.inp.nsk.su DESCRIPTION:Speakers: Eugeny Levichev (BINP)\nhttps://indico.inp.nsk.su/ev ent/24/contributions/1913/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1913/ END:VEVENT BEGIN:VEVENT SUMMARY:SKIF injector complex DTSTART;VALUE=DATE-TIME:20200716T074000Z DTEND;VALUE=DATE-TIME:20200716T080000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1914@indico.inp.nsk.su DESCRIPTION:Speakers: Andrey Zhuravlev (Nikolaevich)\nhttps://indico.inp.n sk.su/event/24/contributions/1914/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1914/ END:VEVENT BEGIN:VEVENT SUMMARY:Superconducting insertion devices constructed by Budker INP DTSTART;VALUE=DATE-TIME:20200716T080000Z DTEND;VALUE=DATE-TIME:20200716T082000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1783@indico.inp.nsk.su DESCRIPTION:Speakers: Nikolay Nikolay Mezentsev (Chief researcher)\nThe ma in generators of radiation in fourth-generation sources are insertion devi ces which are installed in special straight sections of light sources. Mul tipole magnetic systems such as wigglers and undulators are used to produc e high brightness due to a large number of magnetic poles. Multipole magne tic systems are manufactured using conventional electromagnets\, permanent magnets\, and superconducting magnets. A multipole wiggler/undulator type magnet is a sequence of magnets with a changing sign of the transverse fi eld along the electron orbit. The main characteristics of such magnetic sy stems are the field amplitude\, the period of field change\, and the pole gap into which a chamber with an ultra-high vacuum is inserted for the ele ctron beam. Despite the progress in the development of permanent magnet sy stems\, the use of superconducting magnets has a fairly large advantage in creating multipole magnetic systems with identical geometric dimensions. The most common material used for superconducting magnets is niobium-titan ium alloy in a NbTi/Cu copper matrix.\nThe report provides an overview of superconducting insertion devices already used in various synchrotron radi ation centers and are planning to be used in the future on 4+ generation l ight sources.\n\nhttps://indico.inp.nsk.su/event/24/contributions/1783/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1783/ END:VEVENT BEGIN:VEVENT SUMMARY:SKIF civil engineering DTSTART;VALUE=DATE-TIME:20200716T090000Z DTEND;VALUE=DATE-TIME:20200716T092000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1917@indico.inp.nsk.su DESCRIPTION:Speakers: Igor Churkin (Budker INP SB RAS)\nhttps://indico.inp .nsk.su/event/24/contributions/1917/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1917/ END:VEVENT BEGIN:VEVENT SUMMARY:General discussion DTSTART;VALUE=DATE-TIME:20200716T100000Z DTEND;VALUE=DATE-TIME:20200716T110000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1918@indico.inp.nsk.su DESCRIPTION:Speakers: Eugeny Levichev (BINP)\nhttps://indico.inp.nsk.su/ev ent/24/contributions/1918/ LOCATION:Zoom Zoom 860 5034 1820 URL:https://indico.inp.nsk.su/event/24/contributions/1918/ END:VEVENT BEGIN:VEVENT SUMMARY:SR-XRFA in Botanical Research: Elemental Composition of Species of the Genus Syringa (Oleaceae) under Technogenic Impact in Novosibirsk DTSTART;VALUE=DATE-TIME:20200713T135900Z DTEND;VALUE=DATE-TIME:20200713T140000Z DTSTAMP;VALUE=DATE-TIME:20260416T010642Z UID:indico-contribution-24-1039@indico.inp.nsk.su DESCRIPTION:Speakers: Elena Khramova (Central Siberian Botanical Gardens\, SB RAS)\nA study has been first made of the element composition of both t he plants of two species of the genus Syringa\, growing under technogenic impact in Novosibirsk and the soil samples from their habitat by method of X-ray fluorescence analysis using synchrotron radiation (SRXRF) at the st ation of element analysis of SCSTR of the Institute of Nuclear Physics SB RAS (VEPP-3 store ring). \nThe material studied was represented by the p lants of two species - Syringa josikaea and S. vulgaris\, represented by t hree cultivars: ‘Nadezhda’\, ‘Olimpiada Kolesnikova’\, ‘Pamjat o Kirove’\, growing in conditions of technogenic impact and background\, collected in August of 2017 in Novosibirsk. \nA comparative analysis of the soil from the points of sampling of plant samples showed an excess in the content of V\, Zn\, Br\, Pb and a decrease in Mn in urban soils compar ed with the background. \nThe study of the content of macro- and microel ements in the aerial organs of representatives of the genus Syringa showed that the concentration of macroelements K and Ca is higher in the leaves than in the stems\, regardless of the taxon and place of growth. \nThe h ighest total content of K and Ca is revealed in the leaves of S. josikaea. It was found that in plants under technogenic impact\, the content of Mn\ , Fe\, Co\, Cr\, Br\, Rb\, Nb increased and Zn and Mo decreased compared t o the control\, the most severe heavy metal pollution in urban conditions was observed in plants of S. josikaea. \nThe biogeochemical transformati on coefficient (Zv) was calculated\, which reflects a violation of the nor mal ratios of elements in the organs of plants as a result of increased an thropogenic load. The most significant changes in the elemental compositio n of lilac leaves under anthropogenic impact were observed in plants of th e species S. josikaea\, whose Zv of leaves is 37.2\, which is 1.3–1.6 ti mes higher than in plants of S. vulgaris. Plants of the ‘Memory of Kirov ’ variety (Zv = 22.8) are most resistant to pollution. \nAs a result\, reliable data were first obtained on the content of 20 elements in sample s of two species of the genus Syringa in the urban ecosystem of Novosibirs k. The species and cultivars that are most tolerant to pollution in urban conditions\, which can be recommended for widespread use in green construc tion\, are identified. The data obtained on the elemental composition of p lant samples and soils may be included in the databases. This work is part ially supported by RFBR grant № 16-44-040204.\n\nhttps://indico.inp.nsk. su/event/24/contributions/1039/ LOCATION: URL:https://indico.inp.nsk.su/event/24/contributions/1039/ END:VEVENT END:VCALENDAR