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SUMMARY:Structure investigations of radiation-modified polimers
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UID:indico-contribution-137-1151@indico.inp.nsk.su
DESCRIPTION:Speakers: Uliana Ancharova (ISSCM SB RAS)\nPolymethylmethacryl
ate and polyethylene were irradiated with intense beam of high-energy elec
trons or with 'white' beam of synchrotron radiation with different doses.
Results of changes in structure are presented: using synchrotron radiation
X-Ray diffraction and thermal analysis.\n\nX-ray diffraction experiments
were carried out with involvement of equipment belonging to the shared res
earch center SSTRC\, BINP SB RAS.\n\nhttps://indico.inp.nsk.su/event/3/con
tributions/1151/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1151/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The investigation of the aluminum nitride formation during the alu
minum nanopowder combustion in air
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UID:indico-contribution-137-1238@indico.inp.nsk.su
DESCRIPTION:Speakers: Andrei Mostovshchikov (Tomsk Polytechnic University)
\nThe phase formation sequences\, intermediate and final products of alumi
num the nanopowder combustion are studied. It is found\, that the main com
bustion product is aluminum nitride. In the combustion of aluminum nanopow
der\, aluminum γ-oxide is the first to form\, and aluminum nitride is for
med next. The formation of aluminum probably occurs by successive displace
ment of oxygen by nitrogen from the aluminum oxide. The use of sliding (in
cident at a small angle to the surface) synchrotron radiation made it poss
ible to determine with high accuracy (in time) the sequence of stages of f
ormation of crystalline products during combustion of the aluminum nanopow
der.\n\nhttps://indico.inp.nsk.su/event/3/contributions/1238/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1238/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Source-Based Calibration of the Soft X-ray Detectors at the SSTRC
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UID:indico-contribution-137-1153@indico.inp.nsk.su
DESCRIPTION:Speakers: Anton Nikolenko (BINP)\, Natalya Makarova (Altai Sta
te Technical University)\nThe development of the procedure of absolute cal
ibration of the soft X-ray detectors is presented. In our measurements\, t
he detector is positioned in a calculable synchrotron radiation flux behin
d filters of well-known transmittance. The spectral responsivity of the de
tector is restored on the basis of measurement data using a set of integra
l equations. Previously\, this procedure was used for calibration of the s
ilicon photodiodes SPPD11\, which had a relatively low sensitivity and lar
ge dark signal. Currently\, the calibration procedure is developed for the
calibration of a diamond type detectors. The report comprises descripti
on of the program for the data processing and solution of the system of in
tegral equations. The preliminary results of the calibration of the absolu
te sensitivity of fast coaxial-type diamond detectors is presented too.\n
\nhttps://indico.inp.nsk.su/event/3/contributions/1153/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1153/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The application coated NEG as main pumpdown facility in the narrow
extensive chambers of the particle accelarators
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UID:indico-contribution-137-1187@indico.inp.nsk.su
DESCRIPTION:Speakers: Alexey Semenov (Michailovich)\nThe vacuum system is
an important and integral part of every modern scientific facility. The pa
per describes in detail the design and manufacturing of prototypes with co
ated non-evaporable getter (NEG) as main pumpdown for NSLS-II third genera
tion synchrotron light source and for Coherent electron Cooling of eRHIC.
TiZrV NEG sputtered film in the narrow extensive chambers is a vacuum tech
nology for obtained ultra-high vacuum which is used in many particle accel
erators worldwide. The experimental results of NEG film sticking probabili
ty for hydrogen are presented here.\n\nhttps://indico.inp.nsk.su/event/3/c
ontributions/1187/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1187/
END:VEVENT
BEGIN:VEVENT
SUMMARY:EXAFS study Pt-Me/carbon supported catalytic systems
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UID:indico-contribution-137-1198@indico.inp.nsk.su
DESCRIPTION:Speakers: Vladimir Kriventsov (Boreskov Institute of Catalysis
)\nE.P. Yakimchuk1\, V.V. Kriventsov1\, B.N. Novgorodov1\, D.P. Ivanov1\,
D.G. Aksenov1\, D.A. Zyuzin1\, N.S. Smirnova2\, V.Z. Radkevich3\, D.O. Ant
onov4\, A.V. Chistyakov4\, A.S. Fedotov4\, S.A. Nikolaev5\, M.V. Tsodikov4
\n\n1) Boreskov Institute of Catalysis SB RAS\, Novosibirsk\, Russia\n2) I
nstitute of Hydrocarbons Processing SB RAS\, Omsk\, Russia.\n3) Institute
of Physical Organic Chemistry NAS of Belarus\, Minsk\, Belarus.\n4) Topchi
ev Institute of Petrochemical Synthesis\, RAS\, Moscow\, Russia\n5) Lomono
sov Moscow State University\, Department of Chemistry\, Moscow\, Russia\n\
nIn recent years\, few new types of carbon supported catalysts\, such as a
ctivated carbon \nfibers\, Busofit and CNF carbon nanofibers-based catalys
ts\, inspire a growing interest. As rule\, Busofit and CNF based catalysts
have improved catalytic selectivity\, activity and thermostability as com
pared to the traditional carbon supported catalysts using carbon-black or
Sibunit as supports. This modification of catalytic properties is believed
to result from higher accessibility of the deposited active component to
the reactants and from strong interactions between the catalyst particles
and the support surface. This work is devoted to the comparative structura
l study of few promising Pt\, Pt-Me carbon-based \ncatalytic systems using
different carbon supports by the EXAFS methods: 1) Pt\, Pt-Me Busofit-bas
ed catalysts for CO oxidation\; 2) Pt\, Pt-Me CNF-based cathode catalysts
for PEMFC\; 3) Pt\, Pt-Me Sibunit-based catalysts for hydrocarbon conversi
on. Mesoporous granular carbon composite - Sibunit and carbon active fibe
rs " Busofit (as woven activated carbon fabric modified with thermally sta
ble acid groups) was used for prepaation of supported metal catalysts. Pl
atinum in Pt- and PtMe-forms of Busofit was introduced from Pt(NH3)4Cl2 aq
ueous solution by means of impregnation and ion-exchange. A series of CNF
with different arrangement of graphitic planes were synthesized by decomp
osition of methane and ethylene over transition metal catalysts. These str
uctural types of CNF were used for preparation of the Pt\, Pt-Me catalysts
for PEMFC cathodes. Various synthetic techniques were studied\, using H2P
tCl6 and other Pt complexes as Pt precursors. All EXAFS spectra of the stu
died samples were recorded at Siberian Synchrotron and Terahertz Radiation
Center (SSTRC\, Novosibirsk). The local Pt and Me (Fe\, Cu\, Co) arrangem
ents of all the samples studied were established and the phase composition
s were determined. It was shown that there are some differences of the met
al arrangements for the studied systems. All possible structural models we
re discussed. In addition\, these samples were studied by the TEM\, EDX an
d X-ray diffraction methods. The data of all methods are in a good agreeme
nt. \n\nThe work was done using the infrastructure of the Shared-Use Cente
r “Siberian Synchrotron and Terahertz Radiation Center (SSTRC)” based
on VEPP-3 of BINP SB RAS. This work was supported by RFBR (140301066\, 163
350248\, 163350249\, 163350250\, 160301139)\, SB RAS comprehensive program
II.2P (Project 0305-2015-0018).\n\nhttps://indico.inp.nsk.su/event/3/cont
ributions/1198/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1198/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ferrum fluorides as nanostructured conversion cathodes: in situ XA
FS and XRD study using synchrotron radiation.
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UID:indico-contribution-137-1157@indico.inp.nsk.su
DESCRIPTION:Speakers: Victor Shapovalov (Southern Federal University)\nTra
nsitional metals fluorides have been known from 1960s in the field of rech
argeable batteries. They belongs to the conversion materials\, and by reac
tion with lithium can be reduced to the mixture of zero valent metal and l
ithium fluoride\, resulting the so-called more-than-one electron reaction.
However\, possibly due to the lack of nanostructuration of commercial com
pounds\, fluorides gave the way for more immediately interesting and promi
sing materials.\n\n\n----------\n\n\nSince 1960s various technologies for
producing of nanocompounds have been developed\, so fluorides became one o
f the leading research directions for Li-ion industry. Most efforts are be
ing put into iron trifluoride for several reasons: it’s more environment
ally friendly than others\, cheaper\, requires reasonable synthesis condit
ions\, has relatively low polarization\, etc.\n\n\n----------\n\n\nIn our
study we pursue the goal to determine structural changes which take place
inside the full cell and to look at those processes in situ during cycle.
Experiment was carried on the B station of BM01 (SNBL) beamline at ESRF\,
Grenoble\, as a mixed XAFS/XRD experiment. Samples were prepared with synt
hesis of iron fluoride nanoparticles inside reduced graphene oxide sheets
which increases conductivity. The material offers a stable discharge energ
y of 600-700 Wh/kg over 100 cycles\, which is higher than the widely appli
ed cathode materials (300-500 Wh/kg). Each sample we cycled with 20 mAh/g
in the 1\,2-4\,2 V range\, while measuring Fe K-edge XAFS spectra in trans
mission mode and XRD patterns with 15 minutes interval. For measurements w
e used self-made test cells with glassy carbon windows connected to Gamry
potentiostats responsible for cycling and data acquisition.\n\n----------\
n\nThe Li intercalation in the first discharge is different from subsequen
t cycles. Up to 1.8 V\, a maximum of 0.66 Li will be inserted into the cha
nnels of the framework structure of initial FeF3 0.33H2O (from synthes
is conditions). Then peaks in the XRD patterns disappear and nanocrystalli
ne LiF and Fe phases will form below 1.8 V. On charge\, the ReO3-type FeF3
phase with higher density will form instead of the open-framework structu
re. On second and subsequent discharge reactions\, we will form LiFe2F6 in
stead\, which then also converts to LiF/Fe. This is of theoretical nature\
, because of the nanocrystalline structure of the involved phases\, which
is too small to detect in XRD\, and also similar Fe-F6 environments\, whic
h make the FeF3 phases very hard to distinguish in XAS.\n\n\n----------\n\
nResults of the x-ray studies were associated with cycling data to obtain
structure-charge state dependency. HTB structure of the as-prepared materi
al has open intercalation channels as a result\, full electrochemical reac
tion can be separated into initial intercalation of one Li- anion per form
ula unit and following conversion reaction involving two more Li-\, which
gives us 3LiF/Fe mixture and a complete three electron transition. To prov
e this we performed principal component analysis (PCA) on the series of XA
FS experimental spectra. We have used FitIt software to mathematically dec
ompose the series of the Fe K-edge spectra at different voltages into inde
pendent sub-spectra. It was found that all spectra for discharge process c
an be reproduced as a combination of three components. First component cor
responds to HTB structure\, second to the intercalated structure with Fe2+
charge state and the third one corresponds to metallic Fe. We have observ
ed that pure Fe forms after HTB conversion to intercalated phase. \nWe als
o performed a set of ab initio calculations and DFT modeling for different
concentrations of Li in cathode material. Theoretical simulations for the
Fe K-edge XANES are in progress now to figure out if we can distinguish i
ntercalated HTB structure from the LiFe2F6 phase in the XANES data.\n\nhtt
ps://indico.inp.nsk.su/event/3/contributions/1157/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1157/
END:VEVENT
BEGIN:VEVENT
SUMMARY:THE CRL'S OPTICAL PROPERTIES OF BERYLLIUM GRADES IS-50M AND O-30-
H
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UID:indico-contribution-137-1158@indico.inp.nsk.su
DESCRIPTION:Speakers: Ivan Lyatun (X-Ray Coherent Optics Laboratory (IKBFU
))\nX-ray refractive lenses [1-3] are widely used as beam transport and b
eam conditioning optics at the new generation synchrotron radiation source
s. In order to extend their use for microscopy applications the signifi
cant improvements of the optical properties in terms of shape quality a
nd bulk homogeneity are needed. It turned out that beryllium\, as a low
-Z element\, is the most suitable for lens manufacturing. However\, beryll
ium being a sintered material has an internal grain structure with a rel
atively high content of the beryllium oxide\, which create a strong small-
and ultra-small angular scattering.\n In this work we report results
of study of different types of beryllium (Materion Brush and Russian ROSA
TOM grades) using small angle scattering and phase contrast imaging techni
ques. It was shown that Be with a reduced oxygen content is preferable for
microbeam applications. As for the full-field microscopy\, Be with small
grain sizes is required. In this view a so-called “nano-beyllium” with
grain sizes smaller than 50 nm is very promising for lens manufactuiring.
\n\nReferences\n\n 1. Snigirev\,A.\,Kohn\,V.\,Snigireva\,I. & Lengeler B.
(1996). Nature\, 384\, 49-51.\n 2. A. Snigirev\, V. Kohn\, I. Snigireva an
d etc.\, "Focusing High-Energy X-Rays by Compound Refractive Lenses\," App
l. Opt. 37\, 653-662 (1998)\n 3. A. Snigirev\, I. Snigireva\, “Hard X-ra
y Microoptics”\, Springer Series in Optical Sciences vol. 137\, 255-285\
, 2008\n\nhttps://indico.inp.nsk.su/event/3/contributions/1158/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1158/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Small-Angle X-Ray Scattering Study of Principles of Self-Organizat
ion of Amphiphilic Block Copolymers Based on Polylactide and Poly(ethylene
oxide)
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DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1201@indico.inp.nsk.su
DESCRIPTION:Speakers: Ekaterina Razuvaeva (ISPM RAS)\, Nikita Kuznetsov (N
RC "Kurchatov Institute")\nKuznetsov N.M.1\, Razuvaeva E.V.1\,2\, Zagoskin
Y.D.1\, Kulebyakina A.I.1\, Streltsov D.R.1\,2\, Chvalun S.N.1\,2\, Shtyk
ova E.V.3\n\n1NRC “Kurchatov Institute”\, Moscow\, Russia\n2ISPM RAS\,
Moscow\, Russia\n3IC RAS\, Moscow\, Russia\n\nE-mail: kyz993@ya.ru\, razu
vaeva.kate@gmail.com\n\nAmphiphilic block copolymers are able to self-orga
nization in water with a formation of various supramolecular structures su
ch as spherical micelles\, rod-like micelles\, filomicelles (also called w
orm-like micelles)\, polymerosomes\, etc. It is possible to control evolut
ion of specific morphologies of the copolymers in water solutions by a var
iation of the polymer composition\, architecture\, molecular weight and mo
nomer chemistry. Possibility to produce micelles based on amphiphilic bloc
k-copolymers with a defined morphology makes them attractive for applicati
ons as drug delivery systems. \n\nThe objects of this study were non-toxic
\, biocompatible\, biodegradable amphiphilic diblock (PLLAx-b-PEOy) and tr
iblock (PLLAx/2-b-PEOy-PLLAx/2) copolymers with various hydrophobic/hydrop
hilic blocks lengths ratio. The aim of this study was to investigate influ
ence of a composition of the initial block copolymers on the construction
and properties of the micellar structures by small-angle x-ray scattering
(SAXS). The research work was performed using synchrotron radiation at the
P12 beamline at the Petra III storage ring (DESY\, Hamburg).\n\nWe have r
evealed that the investigated block copolymers in water solution formed co
mplicated two-level systems consisting of individual micelles and ordered
supramicellar structures\, properties and parameters of which strongly dep
end on the architecture and composition of the initial block copolymers. I
n particular\, considerable increasing of the length of the hydrophobic la
ctide block PLLA from 64 up to 418 units (the length of the hydrophilic bl
ock poly(ethylene oxide) was a constant) in the diblock copolymers resulte
d in a paradoxical decreasing of the periodicity of the ordered motifs\, t
hat can be explained by a formation of a folded structure of the long PLLA
block. Increasing of the length of the hydrophobic lactide block PLLA fro
m 30 up to 120 units in the triblock copolymers didn’t lead to a change
of the system spacing. All block copolymers demonstrated a high degree of
the polydispersity. For the investigated block copolymers based on PLLA an
d PEO micelles the main relatively narrow fraction was presented by micell
es with diameter of about 20 nm\, but there were also larger scattering ob
jects with the sizes up to 150 nm in the solution. \n\nAs a result\, on th
e base of SAXS data\, dynamic light scattering\, atomic force and cryo-tra
nsmission microscopy data a theoretical model of the system was suggested.
\n\nThis work was supported in part by Russian Foundation for Basic Resea
rches\, project 16-03-00375.\n\nhttps://indico.inp.nsk.su/event/3/contribu
tions/1201/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1201/
END:VEVENT
BEGIN:VEVENT
SUMMARY:OBSERVATION OF GRAIN-BOUNDARY STRUCTURE FEATURES IN ALUMINIUM ALLO
YS BY MEANS OF XAS AND X-RAY TOMOGRAPHY BY SR
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DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1161@indico.inp.nsk.su
DESCRIPTION:Speakers: Alexander Nizovskii (Boreskov Institute of Catalysis
)\nAluminum and its alloys are considered to be the promising agents for h
ydrogen production in reaction with water to use them in compact fuel cell
s. The only problem is to increase their reactivity. One of the methods of
activation is the treatment of aluminum by gallium-based liquid metal eut
ectics. Previously\, we noted that the process of activating the aluminum
alloys was associated with the grain boundary diffusion of the eutectic co
mponents.\nTo determine the nature of high reactivity of the activated mat
erial in reaction with water\, a number of commercial aluminum alloys were
studied with the help of the methods of XAS and X-Ray tomography by SR af
ter activation. It was shown that the highly active state was associated w
ith the formation of the nanostructured material\, wherein the components
of Ga-In eutectic distributed throughout the grain boundaries in the all t
he mass of the original sample.\nTo confirm this observation\, the aluminu
m alloys with different grain boundary structures have been investigated i
ncluding those having high reactivity as well as the samples which lost th
e activity during prolonged storage under atmospheric conditions. Using X-
ray tomography by SR\, it was shown that in all the highly reactive sample
s\, the components of Ga-In eutectic were distributed in the grain boundar
ies of the entire material. The activated samples\, in which the component
s were not evenly distributed\, did not completely dissolve in water. By X
AS method\, it has been found that in the highly active material\, the eut
ectic components were in metallic state. Deactivation during prolonged sto
rage under atmospheric conditions was associated with oxidation of the com
ponents of the eutectic alloy.\nIt is shown that the distribution of the
eutectic component in the sample is determined by the grain boundary struc
ture of the initial material.\n\nhttps://indico.inp.nsk.su/event/3/contri
butions/1161/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1161/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Vibrating wire magnetic field measuring technique
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1163@indico.inp.nsk.su
DESCRIPTION:Speakers: Artem Zorin (BINP)\nVibrating wire magnetic field me
asuring technique is a kind of current driven wire based magnetic measurem
ent system. Harmonic current is applied to thin wire strained within the w
iggler. The current frequency is multiple by wire self-resonant frequency.
If the magnetic field integral is non-zero\, the wire vibrates. Wire posi
tion sensors measure the deflection. The technique is very sensitive and a
llows to measure many integrals simultaneously.\n\nhttps://indico.inp.nsk.
su/event/3/contributions/1163/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1163/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Pulsed wire method for magnetic field measurements
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1164@indico.inp.nsk.su
DESCRIPTION:Speakers: Artem Zorin (BINP)\nPulsed wire method is a kind of
current driven wire based magnetic measurement system. A current pulse is
applied to thin wire strained within the wiggler. Wire position sensors me
asure the deflection. This method may take the place of Hall-probe method\
, because it shows magnetic field charateristics in every point inside the
wiggler\, not only integral characteristics. And it requires only few mil
liseconds for measurement.\n\nhttps://indico.inp.nsk.su/event/3/contributi
ons/1164/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1164/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Spatial microstructure of multilayered heterosystems\, containing
Ge quantum dots molecules in Si on the stages of their nucleation and grow
th by EXAFS spectroscopy
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1208@indico.inp.nsk.su
DESCRIPTION:Speakers: Simon Erenburg (Nikolaev Institute of Inorganic Chem
istry SB RAS\, Budker Institute of Nuclear Physics SB RAS)\nThe systems wi
th interacting quantum dots (QDs) (in particular\, quantum rings (QRs) or
quantum dots molecules (QDMs) have attracted much attention both as groun
d for studying coupling and energy transfer processes between “artificia
l atoms” and as new systems\, which substantially extend the range of p
ossible applications of QDs.\n\nSome of the EXAFS spectra above Ge*K*- edg
es were measured at the VEPP-3 storage ring (beamline 8) of Siberian Synch
rotron and Terahertz Radiation Center (SSTRC) of the Budker Institute of N
uclear Physics (BINP SB RAS\, Novosibirsk\, Russia). Other part of the spe
ctra was measured at the ESRF (Grenoble\, France). The high energy resolut
ion fluorescence detected HERFD-XANES and EXAFS experiments have been perf
ormed at 12K at the beamline ID26 or ID20 equipped by 5-analyzer x-ray emi
ssion spectrometer. \n\nMicrostructural parameters (interatomic distances\
, coordination numbers\, and Debye–Waller factors) were determined by me
ans of EXAFS spectroscopy consistently on the stages of nucleation and gr
owth multilayered heterosystems\, containing GeSi quantum dots molecules
(QDMs). The relationship between the variations in microstructural paramet
ers and the morphology of superlattices and symmetric assembles of QDs was
established.\n\nIn accordance with the results obtained previously for qu
antum dots SiGe it was found for QDMs\, that distortion at the interfaces
leads to a decrease of Ge-Ge interatomic distances on $\\sim0.03$ Å. It
was established for the samples with stoichiometric formula $Ge_{x}Si_{1-x
}$\, (0.25 \n\nhttps://indico.inp.nsk.su/event/3/contributions/1208/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1208/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Obtaining Soft X-ray Emission and Absorption Spectra using SR from
the VEPP-4 storage ring on the metrology station "Cosmos"
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1172@indico.inp.nsk.su
DESCRIPTION:Speakers: Evgeniy Korotaev (Nikolaev Institute of Inorganic Ch
emistry of the Siberian Branch of the Russian Academy of Sciences)\nX-ray
spectroscopy is powerful tool for investigation of the electronic structu
re of functional materials. X-ray emission spectra (XES) corresponding tra
nsition from valence orbitals to core levels allows to obtain information
about atomic partial densities of occupied states of the elements in compl
ex chemical compounds. X-ray absorption near edge structure (XANES) allows
to study atomic partial densities of unoccupied states.\nUsage of synchro
tron radiation for obtaining XES and XANES spectra is to essentially incre
ase quality of experimental data.\nThe experimental equipment of the "Cosm
os"- synchrotron station was adjusted for obtaining soft XES-spectra of re
ference samples (quartz glass\, aluminum and copper foils). In the present
work were used two different optic schemes: flat (Bragg-scheme) and cylin
drically bent crystals (Iogan’s scheme). Using the cylindrically bent
crystal geometry has shown best result in obtaining soft XES-spectra.\nAls
o it was a special interest to obtain soft X-ray absorption spectra. For o
btaining such spectra the double crystal scheme was used. Thus fine struct
ure of soft X-ray absorption spectra was recorded for reference samples (a
luminum\, copper foils).\nExperimental XES and XANES spectra were compared
with the spectra obtained on a laboratory X-ray spectrometer and the resu
lts of the quantum-chemical calculations.\nThe authors are grateful to pro
f. L.N. Mazalov for useful discussions of experimental data.\n\nhttps://in
dico.inp.nsk.su/event/3/contributions/1172/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1172/
END:VEVENT
BEGIN:VEVENT
SUMMARY:SAXS study of Escherichia coli Dihydrolipoamide Dehydrogenase: str
uctural characteristics and molecular docking
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1173@indico.inp.nsk.su
DESCRIPTION:Speakers: Eleonora Shtykova (1. Shubnikov Institute of Crystal
lography of Federal Scientific Research Centre “Crystallography and Phot
onics” of Russian Academy of Sciences\, Moscow\, 119333 Russia\; 2. Mosc
ow State University\, Moscow\, 119992 Russia)\nDihydrolipoamide dehydrogen
ase from Escherichia coli (LpD) is a bacterial enzyme that is involved in
three different multi-enzyme complexes that catalyze similar decarboxylati
on reactions of 2-oxoacids. All of these complexes comprise three enzymes
known as Е1\, Е2\, and Е3\, where LpD is the Е3 component and the E2 s
ubunit is used by LpD as the lipoamide-containing protein substrate. The
Е1 and Е2 subunits have different structures in different complexes\, wh
ereas the Е3 protein is essentially the same in all of the complexes [1
–4]. The pyruvate dehydrogenase complex from Gram-negative bacteria (for
example\, from E. coli) is composed of 24 E1 subunits and 24 E2 subunits\
, whereas the multiplicity of E3 remains unknown. According to different e
stimates\, there are 12 or 24 E3 subunits\; i.e.\, E3 may consist of six d
imers or six tetramers. It was shown that E. coli LpD exists as a dimer i
n the crystalline state [5]. However\, the solution structure of this prot
ein was unknown. The aim of the present study is to investigate the behavi
or of LpD in solution\, i.e.\, under near-physiological conditions\, by sm
all-angle X-ray scattering (SAXS) and complementary methods. Using modern
techniques for the interpretation of SAXS data and analytical ultracentrif
ugation we determined that in solution LpD exists as an equilibrium mixtur
e of a dimer and a tetramer. The tetramer structure was determined by mod
eling SAXS data and molecular docking. The results obtained by these two m
ethods correlate well with each other. It was shown that there is the rela
tionship between the oligomerization of the protein in solution and its fu
nctional properties. In particular\, the possible flexibility of the tetra
mer follows from the stoichiometric and functional demands of the multienz
yme complexes containing LpD as a component.\n\nThis work was supported in
part by Russian Foundation for Basic Researches (projects 15-54-74002 EMB
L_а \, 15-04-01406\, 15-04-00563).\n\nReferences\n[1] R. H. Behall\, M. S
. De Buysere\, B. Demeler\, et al.\, J.Biol. Chem. 269\, 31372 (1994).\n[2
] H. Lindsay\, E. Beaumont\, S. D. Richards\, et al.\, J. Biol. Chem. 275\
, 36665 (2000).\n[3] W. Wei\, H. Li\, N. Nemeria\, and F. Jordan\, Protein
Expr. Purif. 28\, 140 (2003).\n[4] M. A. Moxley\, D. A. Beard\, and J. N.
Bazil\, Biophys. J. 107\, 2993 (2014).\n[5] K. Chandrasekhar\, J. Wang\,
P. Arjunan\, et al.\, J. Biolog. Chem. 288\, 15402 (2013).\n\nhttps://indi
co.inp.nsk.su/event/3/contributions/1173/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1173/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Small-Angle X-Ray Scattering Study of Carbosilane Dendrimers in He
xane Solution
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1174@indico.inp.nsk.su
DESCRIPTION:Speakers: Eleonora Shtykova (1. IC RAS\, Moscow\, Russia\, 2.
MSU\, Moscow\, Russia)\nDendrimers are three-dimensional\, highly branched
\, monodisperse macromolecules with a well-defined regular structure. They
possess unique properties due to its size\, composition and controlled fu
nctionalization. Among the variety of dendrimers\, carbosilane dendrimeric
macromolecules attracted great attention for their reactive functional gr
oups\, chemical inertness of the molecular skeleton and possibility of med
ical and biological applications [1\, 2]. \nIn the present work three-dime
nsional structure of monodisperse carbosilane dendrimers of zero\, third a
nd sixth generations were studied by small-angle X-ray scattering (SAXS) i
n hexane solution. Using modern methods of SAXS data interpretation\, incl
uding procedure of ab initio modeling\, spherical shape and internal archi
tecture of the dendrimers were revealed depending on the generation number
and on the number of cyclosiloxane end groups constituting a shell of the
macromolecules. With the help of a computer simulation a possibility of s
hape reconstruction of the dendrimer molecules in clusters has been consid
ered\, and the analysis of the intermolecular interaction of the dendrimer
s in solution was performed applying the latest developments of the method
of molecular tectonics.\n\nThis work was supported in part by Russian Fou
ndation for Basic Researches (projects 16-03-00379 and 16-03-00375)\nRefer
ences\n[1] Dendrimers and other dendritic polymers / Ed. by J.M. Frechet\,
D.A. Tomalia. - N.Y.: Wiley & Sons\, 2001.\n[2] Kim Y.H.\, Webster O.W.\
, J. Am. Chem. Soc.\, 1990\, 112\, 4592.\n\nhttps://indico.inp.nsk.su/even
t/3/contributions/1174/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1174/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ellipsometric measurement of the complex refractive index of liqui
ds in the terahertz range
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1175@indico.inp.nsk.su
DESCRIPTION:Speakers: Ivan Azarov (Rzhanov Institute of Semiconductor Phys
ics)\nComplex refractive index of various liquids has been measured in the
THz range using the ellipsometric measurement system with an internal re
flection silicon-prism with the Novosibirsk free electron laser being a s
ource of monochromatic radiation . The measurement technique has been opti
mized both theoretically and experimentally for water solutions. Precision
of the measurement of the absolute values of the real and imaginary parts
of the refractive index (n\, k) equal to 0.01 is achieved experimentally.
\n\nhttps://indico.inp.nsk.su/event/3/contributions/1175/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1175/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Unusual Properties of Structural Characteristics of Potato Virus A
Coat Protein in Solution Revealed by SAXS
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1176@indico.inp.nsk.su
DESCRIPTION:Speakers: Eleonora Shtykova (Shubnikov Institute of Crystallog
raphy of Federal Scientific Research Centre “Crystallography and Photoni
cs” of Russian Academy of Sciences)\nStructural analysis of the Potato V
irus A Coat Protein (PVA CP) in solution was performed by small angle X-ra
y scattering (SAXS). SAXS experiments were carried out using synchrotron r
adiation at the P12 beamline at the Petra III storage ring (DESY\, Hamburg
). Modern techniques for interpretation of scattering data and structural
modeling\, including ab initio protocol\, have been applied in the present
work [1]. Obtained values of radii of gyration (Rg =8.9 ± 0.1 nm for PVA
CP at pH 7.8 and Rg=8.5 ± 0.1 nm for this protein at pH10.5) are too lar
ge to be a characteristic of the isolated protein macromolecule with molec
ular mass of 30.26 kDa calculated from the amino acid sequence of PVA CP.
The average molecular masses (MMs) of the solutes were obtained by us (i)
from the extrapolated I(0) and (ii) from the excluded (Porod) volumes Vp
of the species. MMs calculated by these 2 independent methods clearly ind
icate formation of large aggregates containing dozens (30-60) of individua
l PVA CP macromolecules. Thus\, the overall parameters (Rg\, excluded Poro
d volume\, MMs) point to the existence in the solution of large particles
consisting of many protein macromolecules. On the other hand\, Porod plots
as well as Kratky plots revealed rather compact particles with definite s
hapes though less expressed for PVA CP at higher pH. It means that possibl
y we observed not aggregates\, which as a rule do not possess a certain sh
ape\, but we can see a formation of some kind of ordered structures\, most
possible short virus-like particles (VLPs). The structure and overall cha
racteristics of the VLPs depend strongly on such solution condition as pH:
while a scattering curve from the sample at pH 7.8 demonstrates intensity
pattern characteristic for a specific compact scattering object\, SAXS cu
rve from PVA CP changes dramatically at pH 10.5 and corresponds to a partl
y disordered body without clearly defined boundaries: the CP associates at
pH 7.8 are more compact then those at pH 10.8. The shape of PVA CP at low
er pH obtained by ab initio method is closed to a cylinder\, thereby repro
ducing the shape of the virus\, i.e. this self-assembling in solution to s
hort VLP is an intrinsic biological property of the PVA CP allowing it to
create an envelope to protect genetic material of the virus. Increasing pH
leads to a partial distortion of this virus-like ensemble: the whole shap
e of the PVA CP associates at pH 10.5 becomes loose and splits into separa
te spherical parts. Thus\, according to McDonald and Bancroft [2\, 3]\, PV
Y CP at pH 10.5 disintegrates into monomers\, destroying the structure of
the VLP and pointing to the way of the virus deactivation.\nThis work was
supported in part by Russian Foundation for Basic Researches (projects 15-
54-74002 EMBL\, 15-04-01406\, 16-03-00375 and 16-04-00563).\nReferences\n[
1] Blanchet\, C.E. and Svergun\, D.I. (2013)\, Annu. Rev. Phys. Chem. 64\,
37-54\n[2] Mc Donald JG\, Beveridge TJ\, Bancroft JB.(1976)\, Virology\,
69 (1)\, 327-331.\n[3] Mc Donald JG and Bancroft JB. (1977)\, J. Gen.Virol
.\, 35\, 261-263.\n\nhttps://indico.inp.nsk.su/event/3/contributions/1176/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1176/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Characterization and transformation of Terahertz Bessel beams with
angular orbital momentum
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1177@indico.inp.nsk.su
DESCRIPTION:Speakers: Natalia Osintseva (Budker Institute of Nuclear Ph
ysics)\, Yulia Choporova (Budker Institute of Nuclear Physics)\nRecently\,
using silicon binary axicons with spiral zones\, we transformed a NovoFEL
Gaussian beam into Bessel beams with orbital angular momenta l = ±1 and
l = ±2. In this paper we study the propagation of beams through random me
diа and investigate optical systems which allow extending the length of n
on-diffractive beam propagation.\n\nhttps://indico.inp.nsk.su/event/3/cont
ributions/1177/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1177/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The role of cholesterol recognising amino acid consensuses on amph
ipathic structures of matrix proteins in raft membrane organisation of som
e enveloped viruses
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1178@indico.inp.nsk.su
DESCRIPTION:Speakers: Eleonora Shtykova (Shubnikov Institute of Crystallog
raphy of Federal Scientific Research Centre “Crystallography and Photoni
cs” of Russian Academy of Sciences)\nWe have recently revealed the amphi
pathicity of six CRAC containing alpha-helices of influenza virus (IFV) M1
protein\, and suggest that the phenomenon may play a role in supporting b
oth raft structure of the membrane and organising regular structure the M1
protein shell in the virion [1]. Computer modelling and comparative analy
sing 3D structures of the matrix proteins was carried out for three taxono
mically different enveloped viruses with raft-type membranes\, IFV\, Newca
stle disease virus (NDV)\, and Human immunodeficiency virus (HIV)\, to dis
close amphipathic CRAC containing 3D configurations in their structures\,
and to identify putative motifs\, which may be specifically involved in th
eir interactions with raft membranes. Common structural feature of all thr
ee proteins was found to be the amphipathic structure of their CRAC motifs
\, and localization of the outer CRAC regions on the opposite sides of the
ir globules. Notably\, in contrast to IFV M1\, one CRAC motif on NDV M app
eared on the amphipathic beta-sheet structure. To verify our approach we
also comparatively tested the M protein structure of the non-raft vesicula
r stomatitis virus: the disclosed surface CRAC motif appeared no amphipath
ic configuration. Small-angle X-ray structural analysis (SAXS) of IFV and
NDV matrix proteins in solution gave further evidence in support of our co
nclusions. M1 protein exists in solution as a monomer with a compact NM-fr
agment and an extended and partially flexible C-terminal domain. SAXS anal
ysis demonstrates that CRAC motifs of the M1 protein are located on the op
posite sides of the NM-fragment perpendicular to the C-domain. NDV M prote
in dimerizes in solution\, and its surface CRAC motifs have anti-parallel
location on the opposite sides of the dimer. Thus\, such localization of C
RAC motifs of two different proteins with two different organizations in s
olution allows these matrix proteins to interact both with the membrane an
d with the internal components of the virus. Moreover\, our results sugges
t that oppositely situated CRAC motifs in pairs of both monomeric IFV M1 a
nd dimeric NDV M in the virions may serve as anchors between two neighbour
ing raft platforms consolidating and fastening the envelopes of the viruse
s. CRAC motifs on the surface of these proteins may be involved in arrangi
ng their regular oligomeric structures both in the virions and in solution
.\nThis work was supported in part by Russian Foundation for Basic Researc
hes (projects 15-54-74002 EMBL and 16-04-00563)\nReferences\n1. T. Tsfasma
n\, V. Kost\, S. Markushin\, V. Lotte\, I. Koptiaeva\, E. Bogacheva\, L. B
aratova\, V. Radyukhin. Amphipathic alpha-helices and putative cholesterol
binding domains of the influenza virus matrix M1 protein are crucial for
virion structure organization\, Virus Research\, 2015\, v. 210\, pp. 114
–118.\n\nhttps://indico.inp.nsk.su/event/3/contributions/1178/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1178/
END:VEVENT
BEGIN:VEVENT
SUMMARY:New Insights into Nature of Self-Assembly of Influenza А Virus Ma
trix Protein M1 at Different Conditions: SAXS & AFM Study\, and Modeling
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1180@indico.inp.nsk.su
DESCRIPTION:Speakers: Eleonora Shtykova (Shubnikov Institute of Crystallog
raphy of Federal Scientific Research Centre “Crystallography and Photoni
cs” of Russian Academy of Sciences)\nInfluenza A viruses are important p
athogens that still rank among the major global health problems. Matrix pr
otein M1 in the virus particles is one of the most important and abundant
proteins broadly involved in essential processes of the viral life cycle.
It makes the structural investigation of the M1 protein particularly impo
rtant. We employed synchrotron small-angle X-ray scattering (SAXS) and ato
mic force microscopy (AFM) to study the structure of M1 at different condi
tions. The low-resolution structural models built from the SAXS data revea
l a structurally anisotropic M1 molecule consisting of a compact NM-fragme
nt and an extended and partially flexible C-terminal domain [1]. We demons
trated also that even at low pH the M1 monomers co-exist in solution with
a small fraction of large clusters possessing a layered architecture simil
ar to that observed in the authentic influenza virions. AFM analysis on a
lipid-like negatively charged surface reveals that M1 forms ordered stripe
s correlating well with the clusters observed by SAXS [1]. Low pH conditio
n occurs at the very beginning of cell infection leading to an acid-trigge
red fusion of the viral membrane. Moreover\, change of pH was found to ser
ve as a impuls allowing M1 to carry out its multiple functions in the unco
ating\, nuclear transport\, and assembly of the viral ribonucleocapsid [2]
. Revealed by us helix-like shapes could be treated as pre-matrix protein
superstructures\, whose formation is an intrinsic biological property of t
he M1 protein. It can be assumed\, however\, that the oligomerization of M
1 should strongly depend on pH and on the protein charge. That is why it w
as important to analyse the structure and self-assembly of M1 at gradually
changing pH (up to the neutral pH condition) in solution and on the bare
mica surface using SAXS and AFM\, correspondingly. We found that the oligo
merization processes occur in a similar way in the solution and on the sub
strate\, and quantitatively described these processes. Moreover\, pH 6.0 w
as found to be the condition at which binding between M1 molecules starts
to break. Our results provide new insights into the mechanism of M1 to for
m matrix and virus-like particles alone without partners and give a basis
for a further analysis of the hierarchy of M1 in the virus life cycle.\n\n
This work was supported in part by Russian Foundation for Basic Researches
(projects 15-54-74002 EMBL and 16-04-00563) \n\nReferences\n1. E. Shty
kova et al. PLoS One\, 8\, (2013) e82431.\n2. M. Bu et al. J. Virology\
, 70\, (1996) 8391-8401.\n\nhttps://indico.inp.nsk.su/event/3/contribution
s/1180/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1180/
END:VEVENT
BEGIN:VEVENT
SUMMARY:THE USE OF LABORATORY-BASED X-RAY COMPUTED TOMOGRAPHY FOR THE DIAG
NOSTICS OF X-RAY REFRACTIVE OPTICS
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1181@indico.inp.nsk.su
DESCRIPTION:Speakers: Anton Narikovich (Imanuel Kant Baltic Federal Univer
sity)\nA promising direction of development of modern X-ray optics is an o
ptical system\, based on the compound refractive lenses (CRLs). Main appli
cations of CRLs are microfocusing and X-ray microscopy. In order to improv
e a technology of X-ray optics manufacturing it is urgent to develop an ef
fective approach of precise nondestructive CRL metrology.\nAt this work\,
we report the assessment of the efficiency of non-destructive inspection
– a high-resolution x-ray computed tomography (HRXCT). This technique al
lows to realize non-destructive testing irregularities\, the presence of v
oids\, inclusions in lenses material and at the same time to analyze the s
hape and geometric parameters: the coaxiality\, the distance between the r
efracting surfaces and shape of refractive surfaces.\nHRXCT was performed
using the X-ray inspection system YXLON designed for generating high-quali
ty X-ray images with the 1 µm resolution. We present the CT imaging resul
ts of lenses made of high-purity aluminum with the parabola apex radii of
50 µm.\nComparing the obtained images with specified requirements of the
geometrical characteristics of the lenses\, the quality of the refractive
surface and internal size of defects allows us to estimate the lens manufa
cturing quality.\n\nhttps://indico.inp.nsk.su/event/3/contributions/1181/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1181/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Development of laboratory Metrology for X-ray refractive lenses
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1182@indico.inp.nsk.su
DESCRIPTION:Speakers: Dmitrii Zverev (Immanuel Kant Baltic Federal Univers
ity)\nThe focusing of X-ray synchrotron radiation is one of the main probl
ems of X-ray optics. Development of compound refractive lenses (CRL)\, pro
posed twenty years ago [1]\, should be considered as one of the promising
solution to this problem. Despite the successful development of refractive
optics for X-ray nano-focusing [2] and high-resolution X-ray microscopy [
3] the diffraction resolution limit for CRL has not been achieved. As alre
ady noted [4]\, imaging properties of the CRL depend on the refractive pro
perties of the used materials\, and on the accuracy of the manufacturing t
echnique of the lens optical surface (figure errors). To improve the surfa
ce quality\, dedicated metrological methods to measure geometric character
istics of the CRL parabolic profile are required.\n\nIn this work aluminum
and beryllium refractive lenses with a parabolic profile (small radii of
curvature R = 50 ÷ 1000 μm) made by pressing technique was examined. A c
omparison of different metrological methods to study lenses profile is pre
sented. Proposed comprehensive laboratory metrological approaches allow to
control the quality of the lens profile and to make the input quality con
trol of press tools.\n\n\n1. A. Snigirev\, V. Kohn\, I. Snigireva & B. Len
geler // Nature 384\, 49 - 51 (07 November 1996).\n2. I. Snigireva\, G.B.M
. Vaughan\, A. Snigirev // AIP Conf. Proc. 2011. V. 1365. P. 188.\n3. C.G.
Schroer\, O. Kurapova\, J. Patommel\, et al. // Proc. 8th Int. Conf. X_ra
y Microscopy. IPAP Conf. Ser. 7. P. 94.\n4. I.I. Lyatun\, A.Yu. Goikhman\,
P.A. Ershov\, I.I. Snigireva\, A.A. Snigirev\, “On the Problem of the M
etrology of Refractive X-ray Optics”// Journal of Surface Investigation.
X-ray\, Synchrotron and Neutron Techniques\, 2015\, Vol. 9\, No. 3\, pp.
446–450.\n\nhttps://indico.inp.nsk.su/event/3/contributions/1182/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1182/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Nanostructural ordering of epithelial tissue of silk gland of Anth
eraea mylitta silkworm
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1183@indico.inp.nsk.su
DESCRIPTION:Speakers: Alvina Vazina (Institute of theoretical and experime
ntal biophysics\, RAS)\nX-ray diffraction study of epithelial tissue of si
lk gland of Indian domestic Antheraea mylitta silkworm was carry out on th
e small-angle station DIKSI of the Siberia-2 storage ring (NRC “Kurchato
v institute”\, Moscow). \nThe silk gland is a unique pair organ of inter
nal secretion in diameter 2 mm and length about 1 metre\, that ten times s
urpasses the size of the larva of a silkworm. In an active phase of cocoon
ing all three departments of a glan (anterior\, middle\, and posterior) ar
e filled by jelly-like substratum from fibroin and sericin proteins which
form a silk thread under the influence of mechanical forces (pulling) and
specific geometry of keratin segment of gland. Samples of various departme
nts of a silk gland have been allocated from a larva by soft preparation m
ethods\, and after that dried up at a room temperature under cargo. \nX-r
ay patterns of all departments of a silk gland are characteristic for epit
helial tissues: in a range of 1-5 nm its show several Debay’ rings with
the basic period of identity of 4.72 nm. In our earlier investigations of
epithelial tissues of animals and human the series of diffraction Debay’
reflections at the spacing of 4.65 (± 0.15) nm were attributed to proteo
glycan structures of extracellular matrix [A.Vazina et al.: NIM (2001) A47
0\; NIM (2005) A543\; NIM (2009) A603\; Glass Phys. Chem. (2007) 33]. Thus
\, this periodicity is a nanostructural invariant of proteoglycan structur
es of epithelial tissues of animals\, human\, and insect also.\n\nhttps://
indico.inp.nsk.su/event/3/contributions/1183/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1183/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Nanostructural study of human tumour transformed tissues by X-ray
diffraction methods using synchrotron radiation
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1184@indico.inp.nsk.su
DESCRIPTION:Speakers: Alvina Vazina (Institute of theoretical and experime
ntal biophysics\, RAS)\nThe work is dedicated to investigating the nanostr
uctural organization of proteoglycans in different physiological states of
biological tissues of human and animals. \nExperimental samples of human
tissues obtained during biopsies\, surgeries and pathologoanatomic revisio
ns\; samples of breast cancer tissue were obtained from mammary gland divi
sion of Blokhin’s Onkological Scientific Center of Russian Ministry of H
ealth. We used also unique collection of tumor transformed epithelial tiss
ues from respiratory tracts of liquidators engaged in elimination of the d
isaster sequels on the Chernobyl A-plant obtained from Pulmonogical Resear
ch Institute. X-ray diffraction and fluorescence study of biological tissu
es with using synchrotron radiation were carried out on the channel K1.3 o
f the “Siberia-2” storage ring at NRC “Kurchatovsky Institute”\, M
oscow (on the constructed and created by us small-angle stations DICSI) an
d on the channel 3b of VEPP-3 at INP SD RAS\, Novosibirsk\, and also on SA
XS/WAXS station of European Synchrotron Radiation Facility at Grenoble\, F
rance.\nSmall-angle X-ray patterns of epithelial tissue\, both intact and
pathologically transformed\, display a large number of sharp diffraction r
ings at spacing of 4.5 nm and its higher orders caused by the proteoglycan
s of extracellular matrix of tissue. The period of identity at spacing of
4.65 (± 0.15) nm is attributed by us to regular attachment of olygosaccha
ride chains to the protein core of giant proteoglycan molecules [A.A.Vazin
a et al.\, NIM\, 2005\, A543\, 297-301]. A correlation between the integra
ted intensity of X-ray patterns and elemental content of tissue is observe
d. It is experimentally shown that the structure of proteoglycans can be r
eversibly transformed by metal cations and chelating agents\, and that cal
cium is the major element in the mineral composition of tissue.\nIn cancer
transformed tissues intensity of diffuse scattering and diffraction rings
of 4.5 nm varies in a wide range and correlates with change of calcium co
ntent in the diseased tissues\, a significant change in elemental content
is detected\, up to 200 times increase in the concentration of calcium is
found. The final stage of disease is characterized by a significant increa
se in small-angle diffuse scattering\; Debye rings are never registered. T
reating the tissue with chelating agents such as EGTA and EDTA\, in this c
ase turns out to be ineffective\, suggesting the irreversibility of the st
ructural transformation of the extracellular matrix.\nThus\, the problem o
f cancerogenesis should be looked at in two aspects: investigation of the
mechanisms of normal cell transformation which is initiated by DNA damage
(mutations)\, and the stages of tumor progression\, processes of malignant
cell proliferation\, invasion and metastasis which lead to numerous malig
nant tumors. X-ray study of tissues indicates that it may be possible to u
se diffraction characteristics of proteoglycan structures as novel markers
of pathological transformation of tissues.\nThe research was supported by
RFBR-Moscow region Grant #14-44-03667.\n\nhttps://indico.inp.nsk.su/event
/3/contributions/1184/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1184/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The X-FEL quadrupole with gradient 100 T/m
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1185@indico.inp.nsk.su
DESCRIPTION:Speakers: Ivan Okunev (BINP)\nAbstract - The paper describes X
-FEL quadrupole with gradient 100 T/m. These quadrupole magnets are design
ed for installation in the free space between the XFEL undulators. In orde
r to maintain the high quality of the electron beam at an energy of 10 - 2
0 GeV\, requiring high stability of the magnetic axis of the lens. The ava
ilable size of the aperture of the lens is R = 8 mm. Stability of the quad
rupole magnetic axis better than 5 um for ±10% of a gradient range\, good
quality of the magnetic field ΔВ/В \n\nhttps://indico.inp.nsk.su/event
/3/contributions/1185/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1185/
END:VEVENT
BEGIN:VEVENT
SUMMARY:SRXRF STUDY OF CHEMICAL ELEMENTS CONTENT IN THE ATHEROSCLEROTIC P
LAQUE OF HEART VESSELS
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1188@indico.inp.nsk.su
DESCRIPTION:Speakers: Emiliya Zhuravskaya (Institute of Internal and Preve
ntive Medicine\, Siberian Branch of the Russian Academy of Medical Science
s)\nThe main problem of cardiology\, that society faces\, is the acute hea
rt failure (AHF). Many factors have effect on the development of cardiovas
cular diseases. The primary reasons of myocardial infarction and stroke ar
e hypertension and sclerosis that lead\, with time\, to calcification and
contraction of arteries which prevents blood to enter heart and brain. In
heart vessels an atherosclerotic plaque forms which closing a vascular lum
en\, causes IDH\, and myocardial infarction. Therefore\, studying the deep
mechanisms of plaque formation is the focus of attention. The atheroscler
otic processes in heart vessels may be explained by several theories that
account for the complex processes of atherogenesis. Many papers are devote
d to the cellular composition of plaques. Little\, however\, is known abou
t the element composition of the atherosclerotic nidus of coronary vessels
. Elucidating the content and ratio of chemical elements upon plaque forma
tion in heart vessels may substantially supplement the missing stages of t
his process.\nThe goal of this study is to determine and estimate a comple
x of chemical elements in the substrates of the atherosclerotic nidus of h
uman heart vessels.\nThe method of X-ray fluorescence analysis with synchr
otron radiation (SRXRF) (VEPP-3\, store ring) was used in Center "Siberian
Synchrotron and Terahertz Radiation Center (SSTRC)" to study the content
of chemical elements in vascular walls and in atherosclerotic plaques (sta
ble and unstable) drawn from men after operative therapy. As the amount of
material for studying is limited\, we have developed a special technique
for preparing the samples of vascular and plaque tissues.\nWe measured the
concentrations of K\, Ca\, Cr\, Mn\, Fe\, Co\, Ni\, Cu\, Zn\, Br\, Sr\, Z
r\, and Pb. A comparison was made of the content of elements in the tissue
s of heart vessels with atherosclerotic plaques and of the element composi
tions of stable and unstable plaques. In all the samples studied\, prevail
ing is Ca\, particularly in instable plaques. The concentrations of K\, Ca
\, Cr\, Mn\,Fe\, Ni\, Zn and Br in atherosclerotic plaques are much higher
than in the vascular tissues of heart. At the background of predominant C
a no reliable difference has been revealed in the elements measured in sta
ble and unstable plaques. A high association of Ca with Fe\, Zn\, and Sr h
as been recorded in the atherosclerotic plaques.\nThus\, the SRXRF method
has first allowed one to determine the multielement composition in the sub
strates of the atherosclerotic nidus of human heart vessels.\n\nhttps://in
dico.inp.nsk.su/event/3/contributions/1188/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1188/
END:VEVENT
BEGIN:VEVENT
SUMMARY:X-ray diffraction data for the study of the multilevel nanostructu
res in Ni3Fe deformed single crystals
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1190@indico.inp.nsk.su
DESCRIPTION:Speakers: Svetlana Starenchenko (Tomsk State University of Arc
hitecture and Building)\nX-ray analysis has been applied for the study of
the formation of nanostructures as the result of large plastic deformation
in Ni3Fe single crystals ordered alloy with the L12 structure.\nIt was sh
own that the main structural changes in ordered alloys had the features si
milar to pure metals and the disordered solid solutions. However\, in the
ordered Ni3Fe single crystals the formed nanostructure was more complex. S
tructure consists of nano-crystallites divided by the antiphase boundaries
forming the elements having size a ten times smaller than the dimensions
of the crystallites. The antiphase domain structure was not homogeneous. A
fter the strain of 0.18 together with the domains\, the average size of wh
ich is equal to the original 14 nm\, there were revealed a small fraction
of domains with an average size of 10-11 nm. After the strain of 0.38 or m
ore\, the average size of the antiphase domains was reduced to 5-2 nm. How
ever\, in the material\, a small amount of antiphase domains whose size wa
s close to the original (13 nm) also was revealed along with the small dom
ains. This indicates that the deformation was carried out inhomogeneously
and there remained the sites of material almost unaffected by deformation
processes. Analysis of the research points to the emergence of multilevel
nanostructure with a clearly expressed of the two scale levels. *The repor
ted study was partially funded by RFBR according to the research project
№ 16-03-00182-а*\n\nhttps://indico.inp.nsk.su/event/3/contributions/119
0/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1190/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Superconducting solenoid for superfast THz spectroscopy
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1191@indico.inp.nsk.su
DESCRIPTION:Speakers: Alexey Bragin (Budker Institute of Nuclear Physics)\
nThis project is related to new spectroscopy method in little-developed TH
z \nrange. The method is founded on using of a free electron laser with hi
gh \nspectral power radiation which can be smoothly tuned in desirable ran
ge of \nspectrum. The objects of research of this method are fast processe
s in \nphysics\, chemical and biological reactions. Uniform magnetic field
of 6 T \nvalue in the research area can considerably increase possibiliti
es of this \nmethod. The magnetic field will modulate radiation of free mo
lecules \ninduction on characteristic frequencies of the Zeeman splitting
that gives \nmore possibilities of identification of molecules having even
weak magnetic \nmomentum. Moreover\, the use of magnetic field allows ess
entially increase \nsensitivity of this method due to almost complete sepa
ration of the weak \nmeasuring signals from powerful radiation of the lase
r. A superconducting \nsolenoid was developed for this method. Its design
and peculiarities are \ndescribed in this presentation.\n\nhttps://indico.
inp.nsk.su/event/3/contributions/1191/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1191/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Structural study of novel lipid-dependent dimerization of human GL
TP induced by point mutation
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1192@indico.inp.nsk.su
DESCRIPTION:Speakers: Valeriya Samygina (FSRC "Crystallography and Photoni
cs" RAS\, NRC "Kurchatov Institute"\, Structural Biology Unit CIC bioGUNE
Spain)\nProtein-protein interactions are common in cell and molecular biol
ogy events\, and essential for cellular function. Both homodimers and hete
rodimers are commonly involved in catalysis\, regulation and structural as
sembly. However\, the role of dimerization in controling the action of amp
hitropic peripheral proteins that can exist in water-soluble and lipid-bil
ayer-bound states is not well studied. Human Glycolipid Transfer Protein (
GLTP) carries out the important function of non-vesicular transport of gly
cosphingolipids (GSLs) between membranes [1] but details of the all alpha-
helical GLTP-fold mechanism of action remain unclear. Previously\, reversi
ble lipid-dependent dimerization was discovered for holo-GLTP [2]. Structu
ral studies using synchrotron radiation indicated a homodimer\, reproducib
ly revealed in different crystal forms of GLTP bound with various GSLs. Th
e homodimer is characterized by a 70-80 degree angle between wild-type mon
omers complexed with sulfatide\, but the inter-monomer angle narrows to 63
-66 degrees upon D48V mutation [2]. The inter-monomer contacts were found
to mainly involve helix6-helix6 (H6-H6)\, as well as helix2-helix2 (H2-H2)
at their C-termini. The X-ray structure of another mutant\, K87Q\, comple
xed with 18:1-glucosyl¬ceramide\, reveals a novel homodimer with a differ
ent dimerization contact region that includes the mutation site\, which wa
s not involved in the original dimerization contact region. Fluorescence s
pectroscopy assays involving intrinsic Trp emission changes show that K87Q
-GLTP retains the original binding capacities for such GSLs\, as sulfatide
\, glucosylceramide and galactosylceramide. Thus\, GLTP dimer design could
provide a way to dissect certain steps of the glycolipid transfer process
. The influence of dimer type on steps of lipid transport by GLTP needs fu
rther investigation.\nThis work was supported in part by Russian Foundatio
n for Basic Research project 14-04-01671 and 15-04-07415\, NIH NIGMS GM459
28 and NCI121493\, and CICbioGUNE research funds.\n\nReferences: \n1. Mali
nina L\, Malakhova ML\, Kanak AT\, Lu M\, Abagyan R\, Brown RE\, Patel DJ.
The liganding mode of glycolipid transfer protein is controlled by glycos
phingolipid structure. \nPLoS Biol. (2006). 4:e362. \n2. Samygina VR\, Och
oa-Lzarralde B\, Popov AN\, Cabo-Bilbao A\, Goni-de-Cerio F\, Molotkovsky
JG\, Patel DJ\, Brown RE\, Malinina L. Structural insights into lipid-depe
ndent reversible dimerization of human GLTP. Acta Cryst. (2013). D69:603
–616.\n\nhttps://indico.inp.nsk.su/event/3/contributions/1192/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1192/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Structural determination of nano-dispersed Pd catalysts
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1197@indico.inp.nsk.su
DESCRIPTION:Speakers: Vladimir Kriventsov (Boreskov Institute of Catalysis
)\nE.P. Yakimchuk1\, V.V. Kriventsov1\, B.N. Novgorodov1\, D.P. Ivanov1\,
D.G. Aksenov1\, D.A. Zyuzin1\, N.S. Smirnova2\, V.Z. Radkevich3\, D.O. Ant
onov4\, A.V. Chistyakov4\, A.S. Fedotov4\, S.A. Nikolaev5\, M.V. Tsodikov4
\n\n1) Boreskov Institute of Catalysis SB RAS\, Novosibirsk\, Russia\n2) I
nstitute of Hydrocarbons Processing SB RAS\, Omsk\, Russia.\n3) Institute
of Physical Organic Chemistry NAS of Belarus\, Minsk\, Belarus.\n4) Topchi
ev Institute of Petrochemical Synthesis\, RAS\, Moscow\, Russia\n5) Lomono
sov Moscow State University\, Department of Chemistry\, Moscow\, Russia\n\
nToday\, great attention is attracted to development of highly effective a
pproaches of converting renewable biomass into energy resources as biofuel
s. Some spirit compounds\, such as ethanol\, butanol\, pentanol\, glycerin
e\, being biomass fermentation products\, may be used as fuel components\,
both without any treatment and after catalytic converting\, that provides
production of more effective fuel components. The presented work is devo
ted to a study of the state and local structure of original nano-dispersed
catalytic low-percentage systems PdMe (Me=Zn\, Co\, Mn\, Ag) \, used for
production of alkanes or olefins fractions С4-С12+ which components of b
iofuels obtained from biomass fermentation products. Initial samples of ca
talysts were prepared by impregnation and zol-gel methods from original mo
no- and hetero-metallic precursors located on the oxide supports. All XANE
S and EXAFS spectra of the studied samples were recorded at Siberian Synhr
oton and Terahertz Radiation Center (SSTRC\, Novosibirsk).Genesis of the l
ocal structure of the studied catalytic nanosystems was characterized in d
etail. The interatomic distances and corresponded coordination numbers wer
e revealed. All possible structural models were discussed. Relations betwe
en their catalytic properties\, local structure distortions and state of m
etal components were demonstrated. It was found out that active components
of all studied systems were highly dispersed onto the oxide support surfa
ce and strong interaction with the support took place\, resulting in forma
tion of mixed surface MeOx - support oxides. Additionally\, the samples of
catalysts were characterized by the TEM\, EDX and XPS methods. The data o
btained by all the methods are in a good agreement. \n\nThe work was done
using the infrastructure of the Shared-Use Center “Siberian Synchrotron
and Terahertz Radiation Center (SSTRC)” based on VEPP-3 of BINP SB RAS.
This work was supported by RFBR (140301066\, 163350248\, 163350249\, 16335
0250\, 160301139)\, SB RAS comprehensive program II.2P (Project 0305-2015-
0018).\n\nhttps://indico.inp.nsk.su/event/3/contributions/1197/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1197/
END:VEVENT
BEGIN:VEVENT
SUMMARY:XRF with SR micro beams in the study of geological samples.
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1202@indico.inp.nsk.su
DESCRIPTION:Speakers: Fedor Darin (Budker Institute of Nuclear Physics SB
RAS)\nMicro beams of synchrotron radiation at the experimental station of
elemental analysis in the storage ring VEPP-3 obtained using polycapillary
focusing optics. The minimum sizes of the exciting radiation spot with an
energy of 8 – 25 keV on the sample surface is 10x15 square microns. Thi
s allows us to make detailed studies of the elemental composition of vario
us geological samples: mono crystals\, inclusions\, annual layers in the b
ottom sediments and other. A set of analyzed elements depends on the excit
ation energy. For the energy of 25 keV it is possible to analyze about 30
rock-forming and trace elements: K\, Ca\, Ti\, V\, Cr\, Mn\, Fe\, Co\, Ni\
, Cu\, Zn\, Ga\, As\, Se\, Br\, Rb\, Sr\, Y\, Zr\, Nb\, Mo\, Ru\, Rh\, Pd\
, Ag using K-series\, and Ta\, W\, Au\, Pb\, Th\, U using L-series. The de
tection limits for light elements (K\, Ca) are estimated to be 500-300 ppm
\, for Pd\, Ag in optimal conditions\, the detection limit is about 50-100
ppb.\nLocal microanalysis or two-dimensional scanning is possible using o
ne focusing lens. One can make a three-dimensional study of micro inclusio
ns by using confocal scheme of experimental station (two lenses scheme). A
lso instrumental functions of pollycapilary lenses and confocal x-ray micr
oscope were calculated to vary spot size on the sample (in range from 10 t
o 100 microns) and confocal volume size.\n\nhttps://indico.inp.nsk.su/even
t/3/contributions/1202/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1202/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Application of ELN-200 in deep X-ray lithography
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1204@indico.inp.nsk.su
DESCRIPTION:Speakers: Vladimir Nazmov (Budker Institute of Nuclear Physics
)\nThe negative tone electron beam resist ELN-200 has been developed in 80
th years of the 20th century for thin film patterning. The sensitivity of
the resist to X-rays has also been studied [E.S.Gluskin\, A.A.Krasnoperova
\, G.N.Kulipanov\, V.P.Nazmov\, V.F.Pindurin\, A.N.Skrinsky\, V.V.Chesnoko
v\, Experiments on X-ray lithography using synchrotron radiation from the
VEPP-2M storage ring\, Nuclear Instr.Meth. in Phys.Res.\,v.208(1983) 393-3
98]. In the actual work\, the X-ray lithographic properties of the resist
have been studied after 33 years of storage. It was established that the c
ontrast and the sensitivity of the resist to X-rays are not changed. The c
onditions of both formation of thick resist layers and manufacturing of hi
gh aspect ratio microstructures using hard X-rays are developed. The micro
structures of up to 70 um in height have been manufactured. The roughness
of vertical sidewalls of the microstructures doesn't exceed 50 nanometers.
\n\nhttps://indico.inp.nsk.su/event/3/contributions/1204/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1204/
END:VEVENT
BEGIN:VEVENT
SUMMARY:On the structural features of mechanically alloyed Cu-Ag and Au-Co
by severe cold and cryogenic plastic deformation
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1206@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))
\nSystems of positive enthalpy of mixing Cu-Ag and Au-Co in a condition of
powder mixtures were processed by high pressure torsion at 293 K (cold de
formation) and 80 K (cryodeformation). Original concentration of the eleme
nts for Cu-Ag was 80:20 at.% respectively and for Au-Co were 80:20 and 50:
50 at.% respectively. The samples were studied by an X-ray diffraction ana
lysis by synchrotron radiation at a wavelength of 0.03685 nm. It was found
that the substitution solid solutions on the base of Cu for Cu-Ag and on
the base of Au for Au-Co are formed. Besides that another phases as a resu
lt of decay or incomplete dissolution was also recorded. It was revealed t
hat for Cu-Ag the cryogenic temperature effect during strain at constant p
ressure doesn't contribute to increase the content of Ag in solid solution
. But for Au-Co this effect is reversal. More than that each of the follow
ing factors promote to increase the Co content in solid solution: increasi
ng of pressure\, reducing the temperature to cryogenic one\, increasing of
the applied strain and\, of course\, increasing of Co content in original
mixing.\n\nhttps://indico.inp.nsk.su/event/3/contributions/1206/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1206/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Scanning X-ray fluorescence analysis of biological samples
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1207@indico.inp.nsk.su
DESCRIPTION:Speakers: Arina Lobova (Budker Institute of Nuclear Physics SB
RAS)\nThe objective of the work is examination of plant standards for est
imation of the minimum limits of detection of trace elements in biological
tissues and samples\, as well as visualization of the distribution profil
e of some chemical elements in a clinical sample. The work considers the a
dvantages of using synchrotron radiation (SR). The examination of prepared
samples was conducted by a standard technique\, a reference to which is g
iven in the work. The analysis enables determination calculation of the mi
nimum limits of detection of elements. A conclusion was made that analysis
enables detection of heavy elements with a content of about 1 ppm in a bi
ological tissue. The linear profile of platinum distribution in a clinical
sample and a two-dimensional map of the distribution of elements has been
obtained\; a correlation between the relative content of sulfur and plati
num in the material of a bulb of the brain has been revealed. The correspo
nding figures and graphs are presented.\n\nhttps://indico.inp.nsk.su/event
/3/contributions/1207/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1207/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Technogenic Fallout of Uranium and Thorium in Novosibirsk vicinity
(Russia\, West Siberia)
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1209@indico.inp.nsk.su
DESCRIPTION:Speakers: Svetlana Artamonova (IGM SB RAS)\nThe article is dev
oted to the problem of technogenic pollution of environment: the results o
f the mineralogical and geochemical investigation of suspension content of
melted snow and soils samples of Novosibirsk vicinity are considered. Co
ntent of U\, Th and heavy metals were determined by means of X-ray fluores
cence elemental analysis with synchrotron radiation (SR-XRF) method. For t
he 235U and 238U isotope analysis is used mass-spectrometry with inductive
ly coupled plasma (ICP-MS) method. Mineral formations of aerosol particles
were studied with scanning electron microscopy.\nPreviously shown that th
e V\, Mn\, I\, Ga are the main geochemical indicators of emission of Novos
ibirsk heat and electric power plants (HEPP -2\, -3\, -5) [Artamonova\, 20
11]. But the Th and U is revealed to be the geochemical indicators of HEPP
emission too. Brown coal of Kuzbas and Kansk-Achinsk coal basin are used
as firewood of Novosibirsk TETs. Coal of these deposit basin is known to b
e enriched by heavy metals and natural radionuclides during their geologic
al origin time. So\, Th and U are significant in technogenic fallout of vi
cinity. This fact is confirmed by studies results: U and Th content in aer
osols and soil of HEPP vicinity are a few times greater than in pure backg
round cite. \nThe second source of U fallout are the emissions of the No
¬vosibirsk Chemical Concentrates Plant (NCCP) of Rosatom State Nuclear En
ergy Corporation. Namely the isotope 238U/235U ratio is used as the main i
ndicator of NCCP aerosol pollution. The maximal distance of NCCP emission
plume is revealed to arrive by 70 km\, where 238U/235U ratio of aerosol is
132.1 3.3. The 238U/235U increases up to about natural ratio 138.4 at
110 km far from NCCP emission northern east plume only. In the NCCP vicin
ity the particles of uranium oxides in technogenic aerosol were establishe
d by means of scanning electron microscopy.\nThus the U\, Th technogenic p
ollution of Novosibirsk vicinity is revealed. The ecological situation may
be developed by heat and electric power plant modernization\, by gaseous
will stand the dominating firewood of Novosibirsk HEPP. The elemental SR-X
RF analysis of snow precipitation and soil can be used to carry out a time
ly and reliable environmental assessment of an urban territory. \nThe work
was supported by the Russian Foundation for Basic Research under project
No. 14-05-00289.\n\nhttps://indico.inp.nsk.su/event/3/contributions/1209/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1209/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ELEMENT COMPOSITION OF PENTAPHYLLOIDES FRUTICOSA OF THE RUSSIAN FA
R EAST AND EAST SIBERIA
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1211@indico.inp.nsk.su
DESCRIPTION:Speakers: Elena Khramova (Central Siberian Botanic Garden\, SB
RAS)\nThe element composition of both bush cinquefoil (Pentaphylloides fr
uticosa)\, growing in the Russian Far East (Primorsky krai\, Amurskaya obl
ast) and East Siberia (Buryatiya\, Irkutskaya oblast)\, and the samples of
soils has been studied by the method of X-ray analysis using synchrotron
radiation (SR XRF) at the station of element analysis of the Shared-Use Ce
nter SSTRC Budker Institute of Nuclear Physics\, SB RAS (VEPP-3 storage ri
ng). \nThe goal of the work was to investigate the interpopulation variabi
lity of the element composition of P.fruticosa and to reveal populations w
ith a high content of macro- and microelements.\nNo less than 21 elements
were determined (K\, Ca\, Ti\, V\, Cr\, Mn\, Fe\, Co\, Ni\, Cu\, Zn\, As\,
Se\, Br\, Rb\, Sr\, Y\, Zr\, Nb\, Mo\, Pb). The maximal content of macroe
lements (K\, Ca) was \, as a rule\, recorded in leaves and that of microel
ements was found in stems independent of natural habitat. The highest cont
ent of Fe\, Ti\, Zn\, Ni\, Pb\, Nb\, Co was determined in the stems of the
plants of the Primorsky krai\, that of Cr\, Zr\, Sr and Br was found in t
he plants of Buryatiya\, and the highest content of Y and V was recorded i
n the plants growing in the Irkutskaya oblast. Mn was accumulated mainly i
n the leaves of the plants of the Amurskaya oblast\, Rb was found in the p
lants of the Irkutskaya oblast and Cu\, Мо and Se – in the plants of B
uryatiya. The high content of Fe\, Co\, Ni\, Cu\, Rb\, Zr\, Pb in plants c
orrelates with their content in the soils of sampling sites.\nMost stable
is the content of Ca\, K and Cu (СV= 8 – 20%) in the plants of various
habitats. The variability of the rest elements of P. fruticosa is estimate
d as high and very high. In this case\, the populations exhibit a small sp
read of element content (about an order of magnitude) which may be conditi
onally assigned to narrow samplings. The concentrations of Ni and Mo in th
e leaves of P. fruticosa vary by two orders of magnitude. The calculated m
ean geometric values of the element content in the leaves and stems of P.
fruticosa of the populations studied are typical of the species\, may be a
pplied in a comparative analysis with other plants\, may be used to standa
rdize the vegetable staff and may be included in the data base.\n\nThe rep
orted study was funded by RFBR according to the research project No.16-3
4-00699-мол_а.\n\nhttps://indico.inp.nsk.su/event/3/contributions/1211
/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1211/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Electron Beam Stability in the Energy Recovery Linac for the Litho
graphic Free Electron Laser
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1213@indico.inp.nsk.su
DESCRIPTION:Speakers: Yaroslav Getmanov (Budker INP)\nAccording to microel
ectronic production leaders the lithography based on the free electron las
er (FEL) could become the main technology for the elements mass production
with scale to 5 nm in the nearest future. One of the main problem is the
absence of the working FEL with required parameters. The feasibility study
of those FEL based on superconducting energy-recovery linac (ERL) was mad
e in Budker INP. The ERL average current is limited by longitudinal and tr
ansverse instabilities\, caused by interaction between electron beam and i
ts induced fields in the superconducting cavities. The estimations of the
threshold currents and ERL parameters were made.\n\nhttps://indico.inp.nsk
.su/event/3/contributions/1213/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1213/
END:VEVENT
BEGIN:VEVENT
SUMMARY:On the dynamical theory of the X-ray DuMond-type spectrometer
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1219@indico.inp.nsk.su
DESCRIPTION:Speakers: Tesik Chen (Moscow Technological University\, Depart
ment of Physics)\nDynamical Laue-diffraction of X-rays on the bent crystal
is presented. The phase of diffracted wave takes into account cubic terms
. The DuMond-type spectrometer is considered for the X-ray source\, situat
ed on the Rowland-circle. Dynamical theory of the DuMond-type spectrometer
is developed for ideal and mosaic curved crystals. Dependence of the spec
tral resolution on the source dimensions is analyzed.\n\nhttps://indico.in
p.nsk.su/event/3/contributions/1219/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1219/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Spatial-temporal diffraction of thermal neutrons by ideal deformed
crystals
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1220@indico.inp.nsk.su
DESCRIPTION:Speakers: Tesik Chen (Moscow Technological University\, Depart
ment of Physics)\nDynamical theory of thermal neutrons diffraction by idea
l deformed crystals is presented.\nDeformations of different kinds (mechan
ical bending\, temperature gradient\, ultrasound oscillations) are conside
red. The diffraction phenomenon of spatial-temporal focusing of neutrons i
s analyzed.\n\nhttps://indico.inp.nsk.su/event/3/contributions/1220/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1220/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Status of the experimental station on the fourth beamline of VEPP-
3 storage ring
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1221@indico.inp.nsk.su
DESCRIPTION:Speakers: Alexey Ancharov (Institute of Solid State Chemistry
and Mechanochemistry SB RAS)\nPresent status of the experimental station o
n the fourth beamline of VEPP-3 storage ring (Siberian Center for Synchrot
ron and Terahertz Radiation\, INP SB RAS\, Novosibirsk\, Russian Federatio
n) and some recently obtained results are presented.\n\nhttps://indico.inp
.nsk.su/event/3/contributions/1221/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1221/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Phase content of interfaces Ti / Al3Ti in metal-intermetallic lami
nate studied by x-ray and synchrotron diffraction
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1223@indico.inp.nsk.su
DESCRIPTION:Speakers: Vitaliy Pilyugin (M.N. Mikheev Institute of Metal Ph
ysics of the Ural Branch of the Russian Academy of Sciences (IMP UB RAS))\
nIn the Ti–Al3Ti composites produced by reaction sintering of titanium a
nd aluminum foils under pressure\, any oxides that accumulate at the front
of an intermetallic reaction form a thin extended region in the forming i
ntermetallic Al3Ti layer. This region can be a weak point in the microstru
cture of the laminate composite material. Sintering route was optimized to
minimize the quantity of oxides particles (basically Al2O3 particles) in
order to improve some mechanical properties. The phase content of micron c
omposite layers was studied by x-ray and synchrotron diffraction. X-ray di
ffraction (Bragg-Brentano geometry with a flat-plate sample) showed that c
omposite layers basically contain only Ti and Al3Ti phases. Synchrotron di
ffraction (a transmission mode to pass through the 390 micron thickness sa
mple layer) allowed to reveal the presence of residuals of aluminum phase.
Also\, the frame capture mode\, using of synchrotron beam with the size 0
.4×0.1 mm\, allowed to prove the absence of Al2O3 phase particles along t
he Ti / Al3Ti interfaces. \n\nDiffraction experiments were performed at th
e 4-th SI-channel of VEPP-3 beam station. The research was carried out wit
hin the state assignment of FASO of Russia (theme "Deformation" No. 012014
63327).\n\nhttps://indico.inp.nsk.su/event/3/contributions/1223/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1223/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Application of the Ө-const method on VEPP-3 in small-angle diffra
ctometry of biological objects
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1224@indico.inp.nsk.su
DESCRIPTION:Speakers: Alvina Vazina (Institute of theoretical and experime
ntal biophysics\, RAS)\nThe researches of test samples (collagen fibres an
d alive muscles in various functional conditions) were carried out by meth
od of power diffraction (Ө-const) with use of synchrotron radiations of V
EPP-3 storage ring (INP SD RAS\, Novosibirsk) with a continuous spectral i
nterval from 5 to 20 keV (Е=2GeV\, I = 2 - 10 mA). Use the semi-conductor
Si/Li detector with high energy resolution has allowed to register the in
formative diffraction pictures during exposition times\, essentially small
er\, than at traditional methods of registration. X-ray patterns of collag
en show about 16 diffraction peaks in the range of 1100 - 310 nm\, distanc
e between peaks to 800 eV\, and X-ray patterns of muscle display up to 7 p
eaks in the range of 1430 - 530 nm. \nResults of the work have shown that
high efficiency of registration and the energy resolution of the detector
give possibilities for development of a method of high-speed diffractometr
y of biological objects. \nThus\, the big intensity of SR\, the wide spect
ral interval surpassing the intensity of a monochromatic beam on several d
egrees in integrated intensity\, and modern high-sensitive detectors open
possibilities for the decision of a new class of the problems connected wi
th dynamics of structural transformations.\n\nhttps://indico.inp.nsk.su/ev
ent/3/contributions/1224/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1224/
END:VEVENT
BEGIN:VEVENT
SUMMARY:APPLICATION OF SHORT-WAVE DIFFRACTION OF SYNCHROTRON RADIATION FOR
IN-SITU INVESTIGATION OF ZIRCONIUM HYDRIDES FORMATION AT GAS-PHASE HYDROG
ENATION
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1228@indico.inp.nsk.su
DESCRIPTION:Speakers: Maxim Syrtanov (National Research Tomsk Polytechnic
University\, Tomsk\, Russia)\nZirconium alloys are widely used as construc
tion materials in an active zone of nuclear reactors. During operation of
such alloys in contact with a hydrogen-containing environment\, hydrogen p
enetrates into them. This significantly influences on the physical\, chemi
cal and mechanical properties of the material [1\,2]. To investigate the e
ffect of hydrogen accumulation on the zirconium alloys properties is neces
sary to prepare the experimental samples with different hydrogen concentra
tions and different distribution. However\, the hydrogenation process can
be hampered by the presence of a thin oxide film on the samples surface\,
which is greatly effect on the hydrogen distribution by material volume. T
he application of the nickel coating increases the hydrogen sorption rate.
Also nickel has a high permeability to hydrogen. Moreover\, the nickel ox
idation is less active than zirconium\, which contributes to hydrogen abso
rption.\n\nIn this paper zirconium alloy (Zr1%Nb) samples with a micron-or
der nickel layer were investigated. Hydrogenation was carried out by gas p
hase method at temperatures of 350\, 450 and 550 ° C. Hydrogen pressure i
n chamber was 1 atm. Hydrogen sorption curves were obtained on the automat
ed complex Gas Reaction Controller. In situ diffraction measurements were
carried out in the process of hydrogen saturation of samples at the statio
n "Precision diffractometry II» of the Institute of Catalysis of the Sibe
rian Branch of the Russian Academy of Science at the 6 synchrotron radiati
on channel of the VEPP-3 electron storage ring.\n \nComparison of the data
obtained in the analysis of hydrogen sorption curves with data of the pha
se transitions in the zirconium-hydrogen system at a gas phase hydrogenati
on allowed describing the processes occurring in zirconium by hydrogenatio
n at different temperatures. \n\n1. Silva K.-R.F.\, DosSantos D.S.\, Robei
ro A.F.\, Almeida L.H. Hydrogen diffusivity and hydride formation in rich-
zirconium alloys used in nuclear reactors // Defect and Diffusion Forum. 2
010. Vol. 297- 301. P. 722-727.\n2. Zielinski A.\, Sobieszczyk S. Hydrogen
-enhanced degradation and oxide effects in zirconium alloys for nuclear ap
plication // Intern. Journ. of Hydrogen Energy. 2011. Vol. 36. P. 8619-86
29.\n3. Kudiyarov V. N. \, Kashkarov E. B. \, Syrtanov M. S. \, Babikhina
M. N. \, Vlasov V. A. Investigation of hydrogenation parameters influence
on hydrogen sorption rate by Zr-1%Nb alloy with nickel layer // Извес
тия вузов. Физика. - 2015 - Т. 58 - №. 9/3. - C. 20-23\n\
nhttps://indico.inp.nsk.su/event/3/contributions/1228/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1228/
END:VEVENT
BEGIN:VEVENT
SUMMARY:System for diagnostics of local electron beam losses in microtron-
recuperator at Novosibirsk Free Electron Laser beamline via registration o
f induced X-rays.
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1231@indico.inp.nsk.su
DESCRIPTION:Speakers: Stanislav Serednyakov (Budker Institute Of Nuclear P
hysics)\nThe Novosibirsk Free Electron Laser (FEL) is based on a 4-turn mi
crotron-recuperator. To ensure its stable operation and radiation generati
on\, it is necessary to provide a stable mode of electron beam recirculati
on and minimize beam losses on the vacuum chamber wall on all the way of b
eam in the accelerator beamline. To fulfil this task it is necessary to k
now the longitudinal distribution of these losses along the beamline.\nTo
this end\, a system for registration of beam losses was created. The syste
m applies optical fibers placed along the full length of the vacuum chambe
r and nearby it. In case of local electron beam losses somewhere in the va
cuum chamber\, electrons falling to the vacuum chamber wall cause generati
on of X- and gamma rays. This radiation in turn causes generation of optic
al radiation in the optic fiber nearby the region of electron “precipita
tion” on the chamber wall. Then\, executing some transformation and proc
essing of the time dependencies of signals from these optic fibers\, one c
an obtain the longitudinal distribution of electron beam losses along the
whole accelerator channel in all its 4 turns.\n\nhttps://indico.inp.nsk.su
/event/3/contributions/1231/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1231/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Influence of terahertz laser irradiation on the morphology of chic
ken hepatocytes
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1232@indico.inp.nsk.su
DESCRIPTION:Speakers: Eugeny Zelentsov (MC "Integral medicine")\nPreviousl
y\, we have discovered the erythrocyte membrane disruption in aqueous solu
tion under the influence of high-power pulses of the Novosibirsk free elec
tron laser operated at the wavelength of 120-170 microns\, with the averag
e power density of 10W/cm2. This fact was explained by the emergence of po
werful ultrasound caused by water absorption of terahertz radiation. In th
is report hepatocytes were studied under the same conditions. The aim of t
he study was to evaluate the effects of radiation on normal hepatocytes in
comparing with previous studies of red blood cells.\nLiver fragments were
sampled and transferred into 500ul of aqueous suspension and irradiated w
ith non-focused beam at different exposure time. Samples were examined his
tologically using the atomic force microscopy (tapping mode) in the native
form. Exposure of 2-4 seconds resulted in single membrane injuries and a
slight change in the shape of hepatocytes. Exposure of 5- 10 seconds or mo
re leads to significant damage of hepatocyte membranes.\nResults have full
y confirmed the earlier experiments. Destructive effects of high-power THz
pulses on biological objects in the aquatic environment were proven.\n\nh
ttps://indico.inp.nsk.su/event/3/contributions/1232/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1232/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Small angle X-ray scattering on RE31 aptamer
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1235@indico.inp.nsk.su
DESCRIPTION:Speakers: Vladimir Zabluda (Kirensky Institute of Physics Russ
ian Academy of Sciences\, Siberian Branch)\nThis work shows aptamer RE31 (
5′-GTGACGTAGGTTGGTGTGGTTGGGGCGTCAC-3′) by small angle X-ray scattering
(SAXS) measuring results\, wich obtained on DIKSI station in the Nationa
l Research Center 'Kurchatov Institute'. Also the aptamer structure model
is presented\, wich was processed in DAMMIN software.\nAccording to obtain
ed model\, the molecular simulation was constructed with known nucleotides
considering interatomic interactions.\nWe have compared aptamer model fro
m SAXS with crystallographic method and confirmed\, that SAXS can provide
us the information about the size and native shape of bioaptamers in solut
ion. However SAXS method doesn’t require the crystal growing and high co
ncentrations for measuring.\n\nhttps://indico.inp.nsk.su/event/3/contribut
ions/1235/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1235/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Deflection of THz vortex beam in non-polar liquids by means of aco
usto-optics
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1237@indico.inp.nsk.su
DESCRIPTION:Speakers: Pavel Nikitin (Lomonosov Moscow State University)\nI
nteraction of terahertz vortex beam and bulk acoustic wave in a number of
non-polar liquids was investigated. It was found that hexane is the most p
romising liquid for acousto-optic applications. The diffraction efficiency
for the vortex beam was of the same magnitude as for non-vortex beam.\n\n
https://indico.inp.nsk.su/event/3/contributions/1237/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1237/
END:VEVENT
BEGIN:VEVENT
SUMMARY:In situ SR SAXS study of liquid intermediates arising during nucle
ation of gold sulfide nanoparticles in aqueous media
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1239@indico.inp.nsk.su
DESCRIPTION:Speakers: Maxim Likhatskiy (ICCT SB RAS)\nRecently\, using DLS
\, AFM (both\, in situ and ex situ)\, STM and SAXS techniques\, we found a
series of fluid nanoscale intermediates preceding nucleation of gold sulf
ide in the reaction between aqueous HAuCl4 and sodium sulfide. In present
contribution SR SAXS technique was applied to monitor the size evolution o
f scatterers which are presented initially by “liquid clusters”. The
“liquid clusters” were found to have a small negative charge and coale
scence into larger species exhibiting negative zeta-potential of about 30-
40 mV and associating to submicrometer aggregates. The nucleation and foll
owing aggregation of gold sulfide nanoparticles proceed progressively rath
er than instantly. The processes were accelerated critically by the addit
ion of 0.05M NaCl solution or at elevated temperatures. On the onset of re
action single fraction sticky spheres model fits the experimental SAXS dat
a satisfactorily. However\, starting from some instance\, the second (smal
ler in size) fraction needs to be taken into account to successfully descr
ibe the SAXS data\, which means that SAXS can be used to get insights into
the prenucleation and nucleation processes.Similiar results were taken fo
r the process of hexachloroplatinic acid reduction by sodium sulfide.\n\nh
ttps://indico.inp.nsk.su/event/3/contributions/1239/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1239/
END:VEVENT
BEGIN:VEVENT
SUMMARY:SR XRF USED TO STUDY THE CONTENT OF CHEMICAL ELEMENTS IN THE LEAVE
S OF LONICERA CAERULEA (CAPRIFOLIACEAE)\, DEPENDING ON THE CHANGE IN SEISM
IC ACTIVITY
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1240@indico.inp.nsk.su
DESCRIPTION:Speakers: Irina Boyarskikh (Central Siberian Botanic Garden\,
SB RAS)\nThe active\, deep faults of lithosphere are the channels\, carryi
ng the flows of substance and energy\, that can affect natural environment
\, to the surface of the planet. The ascending migration of fluids and the
emanation of gases in the zones of active\, tectonic faults have a promin
ent effect on the distribution of chemical elements in soil\, air\, and p
lants. The impact of the active faults on biota is subjected to temporal v
ariations due to seismic changes. The present work studies the content of
chemical elements in the leaves of Lonicera caerulea L. (blue honeysuckle)
over the region characterized by a high\, seismic activity and the novel
tectonic faults related to the central part of the Chuiskii earthquake of
2003. The studies were performed in 2004\, 2008-2010 during a gradual decr
ease in seismic activity in this zone. The total content of micro- and mac
roelements in soil and their accumulation in vegetable leaves were determi
ned by the method of X-ray fluorescence analysis using synchrotron radiati
on (SR XRF) at the station of element analysis of the Siberian Center of S
ynchrotron and Teraherz Radiation\, Budker Institute of Nuclear Physics (V
EPP-3 storage ring). Fluorescence was excited by monochromatized synchrotr
on radiation with an energy of 23 and 38 keV\, which allowed one to analyz
e the elements from K to Ba by the K-series\, and from Pb by the L-one of
the characteristic X-ray radiation. The concentration of an active form of
the elements was measured in soil by atom-absorption method. The intensit
y of the biological absorption of the elements by the leaves of blue honey
suckle was estimated by the coefficient of biogeochemical activity\, i.e.\
, the ratio between the element content in the dry substance of plants an
d the concentration of the active element form in soil. The SR XRF method
made is possible to study the relation between 26 elements in vegetable le
aves and in soils with high sensitivity (n*10-9 g/g) within a wide concent
ration range in small samples (10-30 mg). A comparative estimation of the
element content in the leaves of L. caerulea subsp. altaica\, collected in
the zone of the active\, tectonic fault in different years\, indicated th
at during the period of high seismic activity (2004) the concentrations o
f K\, Fe\, Cu\, Ti\, V\, Zr\, and Nb in plants decrease and those of Ca\,
Ba\, Br\, and Sr increase. In this case\, the relations between the basic
elements (biophils) also changed. A reliable\, positive connection was est
ablished between the gross content of Ca\, Sr\, and Ti in soil and leaves.
The linear relations between the gross content and the content of the act
ive form of biophilic elements Ca\, Zn\, and Sr in soils were also positiv
e. In 2004\, a more intense accumulation of secondary metabolites\, i.e.\,
chlorogenic acid and glycoside лютеолина\, involved in the regul
ation of the mineral supply of plants\, was recorded in the leaves\, colle
cted in the fault zone.\n\nhttps://indico.inp.nsk.su/event/3/contributions
/1240/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1240/
END:VEVENT
BEGIN:VEVENT
SUMMARY:STABILITY OF THE ELEMENT COMPOSITION OF VEGETABLE SAMPLES WITH LON
G -TERM STORAGE
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1241@indico.inp.nsk.su
DESCRIPTION:Speakers: Elena Khramova (Central Siberian Botanic Garden\, SB
RAS)\nThe content and composition of the elements of vegetable samples ha
ve been first analyzed in connection with storage periods by the method of
X-ray fluorescence analysis\, using synchrotron radiation (SR XRF).\nThe
objects of studying were the samples of Pentaphylloides fruticosa\, cultiv
ated in the gradient of radionucleotide contamination over the territory o
f the East-Ural radioactive trace (EURT)\, formed in 1957 due to the accid
ent at the IM “Mayak” (the town of Ozersk\, Chelyabinskaya oblast) and
in the conditionally “background” region of the observation area. In
2005\, the samples of the P. fruticosa leaves and stems\, collected in fo
ur EURT regions\, were analyzed and in 2015 the same samples were analyzed
after a 10-year storage period.\nIt has been established that the element
composition of the samples was almost the same. In 2005\, 18 elements wer
e discovered\, and in 2015 additional two elements (Cr and Nb) were determ
ined\, probably\, because of the improving potentialities of the method.\n
The content of K\, Ca\, Mn\, Fe\, Co\, Cu\, Zn and Sr in the samples of 20
05 and 2015 remained practically the same. As a rule\, the values varied b
y 1 – 50% \, depending on the organ and the environment. More considerab
le variations were observed in the content of Ti\, V\, Ni\, As\, Rb\, Br\,
Y\, Zr\, Mo and Pb\, which may be assigned to the increase in the relativ
e standard deviation (%) as the measure of analysis reproducibility for th
ese elements. In this case\, as compared with 2005\, in 2015 a noticeable
decrease (2-4-fold) was recorded in the content of As and Br in the sample
s of the leaves except for those from the “background” region for whic
h the difference was only 30-35%.\nThus\, the element composition of P. fr
uticosa\, analyzed just after collection\, and the element composition of
that kept for 10 years\, were similar. The most stable are K\, Ca\, Mn\, F
e\, Co\, Cu\, Zn and Sr. The tendencies to element accumulation by plants
in the gradient of nucleotide pollution were preserved independent of stor
age period.\n\nhttps://indico.inp.nsk.su/event/3/contributions/1241/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1241/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Exciton-like and defect-related luminescence in K3WO3F3 oxyfluori
de crystals
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1242@indico.inp.nsk.su
DESCRIPTION:Speakers: Vladimir Pustovarov (Ural Federal University)\nCompl
ex metal oxyfluorides such as K3WO3F3 are attractive compounds for develop
ing new noncentrosymmetric crystals having ferroelectric and ferroelastic
properties. This is achieved due to the strong distortion of metal-(O\,F)
polyhedra in crystal lattice because of different ionicity of metal-O and
metal- F bonds. The luminescence spectroscopy can be a sensitive method to
study the character of lattice distortion of these compounds.\nSpectra of
photoluminescence (PL) and X-ray excited luminescence\, PL excitation spe
ctra (3–22 eV)\, PL decay kinetics as well as thermoluminescence curves
were measured for single crystals and ceramics K3WO3F3. Synchrotron radiat
ion (HASYLAB\, DESY\, Hamburg) were used for low temperature PL experiment
s with time resolution. Crystals were grown and examined in Institute of G
eology and Mineralogy SB RAS (Novosibirsk). \nThe intrinsic luminescence o
f tungstates is usually ascribed to the radiative relaxation of exciton-li
ke excitations localized on WO6 octahedra or WO4 tetrahedra. In K3WO3F3 th
ere are anion sites with mixed oxygen/fluorine occupancy. Therefore\, diff
erent octahedra form with different distortion. Two emission centers of ex
citon-like origin\, with distinct relaxation time\, different types of suc
h octahedra were found. The time-resolved luminescence spectroscopy techni
que was applied to distinguish these centers\, proving itself as a sensiti
ve method to study the character of lattice distortion. The energy transfe
r mechanism between these PL centers is found and tentatively described by
the diffusion of excitons. Apart from intrinsic luminescence\, the PL of
defect-related centers was found in samples irradiated by fast electrons f
rom linear accelerator (E=10 MeV\, D=120 Gy). The role of shallow charge c
arrier traps in the low-temperature luminescence was revealed.\n\nhttps://
indico.inp.nsk.su/event/3/contributions/1242/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1242/
END:VEVENT
BEGIN:VEVENT
SUMMARY:XAFS study of model flotation system - xanthate/zinc sulphate: stu
ctural determination of interaction forms existing in aqueous solution and
deposition.
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1245@indico.inp.nsk.su
DESCRIPTION:Speakers: Vladimir Kriventsov (Boreskov Institute of Catalysis
)\nPresently our country takes the first place in terms of reserves and pr
oduction of mineral resources\, but the quality of many ore deposits is lo
w. Ores most involved in the development of new deposits can be classified
hard-to-concentrate\, with a low content of useful components. Existing t
echnologies of enrichment in some cases do not correspond to the quality o
f modern ores. So Russia\, having large mineral reserves\, faces difficult
ies in providing new technologies that can cost-effectively and efficientl
y process those materials. The decision of the problem of increasing the p
rofitability of processing minerals and improving comprehensiveness of the
ir enrichment are of paramount importance. One of the possible technologic
al solutions is the developing approach of selective flotation separation
of minerals with optimization of the proportion and properties of chemical
and physical forms of sorption by combining different types of flotation
reagents. One of the most popular reagents is butyl xanthate potassium\, w
hich is widely used for the extraction of valuable components by flotation
in aqueous solution.\nThe main aim of this work is a study of model flota
tion system - xanthate/zinc sulphate by the method of XAFS spectroscopy. A
ll EXAFS and XANES spectra (Zn-K edge) of the samples studied (both in sol
ution and deposition) were recorded at EXAFS station of Siberian Synchrotr
on Terahertz Radiation Center (SSTRC). Some differences of local structur
e of initial solutions of zinc sulfate (having different concentrations fr
om ~10-4 up to 10-1 mol/l) between each other and great ones compared to t
he bulk samples were found. The presence of different Zn-O forms were dete
cted. For the model flotation system - xanthate/zinc sulphate in aqueous s
olution\, Zn-S forms were predominantly found. Structural determination of
all interaction forms existing in aqueous solution and deposition were ca
rried out in detail. All possible structural models were discussed. Additi
onally powder samples of initial reagents and final depositions were chara
cterized by XRD. The atomic structures of initial bulk sample were establi
shed.\nThe work was done using the infrastructure of the Shared-Use Center
"Siberian Synchrotron and Terahertz Radiation Center (SSTRC)" based on VE
PP-3 of BINP SB RAS. This work is supported by Russian Scientific Foundati
on (Project No 15-17-10017).\n\nhttps://indico.inp.nsk.su/event/3/contribu
tions/1245/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1245/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The experimental station "DETONATION" at beamline 8 from 7 pole 1.
3 T wiggler installed at e+e- collider VEPP-4
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1248@indico.inp.nsk.su
DESCRIPTION:Speakers: Aleksandr Kosov (Budker INP SB RAS)\, Boris Tolochko
(Institute of solid state chemistry and mechanochemistry)\nThe new experi
mental station "Detonation" was put into operation in test mode on the 8-t
h synchrotron radiation beamline from collider VEhPP-4. The station was de
signed for the study of detonation and shock-wave processes in condensed m
edia in conditions approaching parameters (geometrical dimensions\, weight
)\, used in practical\, industrial applications.\nStation "Detonation"\, u
ses radiation of 7-pole wigglers (five main poles with the field of 1.3 T
and the two side\, with half the field [1])/ The new station has a signifi
cantly higher parameters as compared with the previous station at VEPP-3\,
experimental values of the basic parameters such as the intensity and spe
ctrum stiffness\, and volume of the explosion chamber permissible increase
weight of explosion samples. This makes it possible to significantly redu
ce the influence of confounding factors\, specific to the explosive sample
is small and connected with the influence of the near surface\, the curva
ture of the front\, and so on. The main detector at the new station will p
osition sensitive detector DIMEX [2]\, the use of which the station "Explo
sion" VEhPP-3 drive has shown great potential methods associated with the
use of synchrotron radiation to study fast processes [3].\n\n[1] M.G. Fedo
tov\, S.I. Mishnev\, V.E. Panchenko\, et al. SR front ends of VEPP-4M stor
age ring. Nucl. Instr. and Meth. A 470 (2001) 89-93.\n[2] V.M. Aulchenko\,
B.P. Tolochko\, L.I. Shekhtman\, et al. Fast high resolotuion gaseous det
ectors for diffraction experiments and imaging at synchrotron radiation be
am. Nuclear Instr. and Meth. A 623 (2010) 600-602.\n[3] K.A. Ten\, E.R. Pr
uuel\, V.M. Titov. SAXS Measurement and Dynamics of Condensed Carbon Growt
h at Detonation of Condensed High Explosives. Fullerenes\, Nanotubes\, and
Carbon Nanostructures. 20: 587-593. 2012.\n\nhttps://indico.inp.nsk.su/ev
ent/3/contributions/1248/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1248/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Experimental realization of X-ray diffraction and small-angle scat
tering using polychromatic synchrotron radiation in the range 20-30 keV
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1253@indico.inp.nsk.su
DESCRIPTION:Speakers: Boris Tolochko (Institute of solid state chemistry a
nd mechanochemistry)\nThe aim of this work is to develop a method to carry
out X-ray analysis using a broad spectral of synchrotron radiation. This
will give an opportunity to increase the number of photons in the primary
beam on the order of 2-3 and thus reduce the exposure time for diffraction
experiment to nanosecond at VEPP-3 and picosecond at VEPP-4.\n\nhttps://i
ndico.inp.nsk.su/event/3/contributions/1253/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1253/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The synchrotron radiation beamline "Plasma" at collider VEPP-4
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1254@indico.inp.nsk.su
DESCRIPTION:Speakers: Boris Tolochko (Institute of solid state chemistry a
nd mechanochemistry)\nNow we are preparing an experiment to study the beha
vior of the crystal lattice of the material of the fusion reactor first wa
ll in a plasma discharge on the diverter. A fast one-coordinate X-ray dete
ctor was developed for this experiment. The detector enables fast recordin
g of 100 diffraction frames with an exposure time of 73 ps and a periodici
ty of 100 ns. Thus\, we can record X-ray "movies" with high time resolutio
n\, which store information about the dynamics of plasma interaction with
the structure of the crystal surface in a plasma discharge (100 μs in the
ITER). To solve this problem we are developing an installation to work on
beams of synchrotron radiation of VEPP4(BINP SB RAS). The installation wi
ll enable obtaining information about what is happening to the crystal lat
tice when the plasma of the ITER reactor interacts with the wall for a sho
rt period of time. The plasma discharge parameters in the ITER are as foll
ows: an energy of 100 J for 100 μs on an area of 1 mm2. We conducted firs
t successful test experiments\, having recorded changes in the crystal lat
tice W\, using a laser with a power of 1 J and a pulse width of 100 μm. N
ow diffraction patterns with a time resolution of 73 ps can be recorded.\n
\nhttps://indico.inp.nsk.su/event/3/contributions/1254/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1254/
END:VEVENT
BEGIN:VEVENT
SUMMARY:SIZE AND SHAPE DEPENDANCY OF CO ADSORPTION ON Pd14 AND Pd55 NANOCL
USTERS: DFT AND FTIR STUDIES
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1255@indico.inp.nsk.su
DESCRIPTION:Speakers: Yury Rusalev (Southern Federal University)\nPalladiu
m is a very effective catalyst for the oxidation of CO. This reaction is v
ery important for reducing automotive and industrial emissions and conside
red to be a good model for fundamental studies of transition metal catalys
ts. It is known that different types of facets as well as size and shape o
f a metal nanoparticle have an effect on catalyst properties. The scope of
our work is to investigate how the reactivity of Pd nanoparticles towards
CO oxidation depends on their size and shape. The keys to the solution ar
e ab-initio DFT calculations in combination with in-situ FTIR spectroscopy
. For theoretical part\, we have chosen the set of Pd clusters of differen
t size and respective shape. After optimization of their geometry\, the ad
sorbed CO molecules were relaxed at the top-on positions of cluster surfac
e. That allowed us to generate IR spectra to be compared with experimental
ones of CO adsorbed on Pd nanoparticles. In order to be closer to the ind
ustrial-type processes\, a special setup allowing in-situ FTIR measurement
s was designed as well. \n In our theoretical studies we used both molec
ular orbital (ADF-2014) and periodic band structure (VASP 5.2) DFT calcula
tion schemes to model small metallic Pd clusters. The basis in calculation
s was chosen as Triple Zeta with one polarization function and frozen core
. We used standard GGA approximation within PBE scheme. Occupations steep
est descend method was used for better geometry convergence. All the param
eters mentioned above with Scalable SCF gave good convergence in all crite
ria. The cutoff energy for periodic plane wave pseudopotential simulation
was set to 400eV. The cell around Palladium clusters was constructed as a
cubic one with 30 nm edge. A single K-point was used in simulation.\nIn th
is work we constructed and optimized geometry of Pd14 and Pd55 clusters wi
th octahedral symmetry. The relaxed interatomic distances (Angstom) of Pal
ladium 55 cluster with CO molecules placed on top hollow sites of Pd obtai
ned by both ADF and VASP DFT calculation schemes are presented in Table 1.
\n\nTable 1. The relaxed interatomic distances (Å) of Pd-55 cluster with
CO\n\n ADF VASP 5.2\n\n Pd-C 2.052 2.042\n C-O 1.
198 1.200\n\nIR spectra for different configurations were obtained dur
ing the calculation. For example main peaks are at 2107 and 503 cm-1.\nBot
h CO adsorption and oxidation on Pd nanoparticles have been studied extens
ively with different experimental techniques [R1]. It is assumed that reac
tion of CO oxidation follows a Langmuir-Hinshelwood mechanism [R2]\, where
both reactants\, CO and O2\, adsorb on the catalyst surface prior to reac
tion between the adsorbed species to form CO2. There were also found some
differences in the kinetics among the (111)\, (110)\, and (100) planes in
studies on single crystals of Pd [R3]. Significant number of experimental
studies of CO adsorption on surface of Pd have been performed by using Dif
fuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS). DRIFTS
is a useful technique for probing catalysts at catalytically relevant temp
eratures and pressures without intense sample preparation [R4]. \nOur expe
rimental setup for in-situ DRIFT studies of CO adsorption on Pd nanopartic
les as main components includes Vertex 70 FTIR spectrometer\, Praying Mant
is Diffuse Reflection Accessory equipped with Low and High Temperature Rea
ction Chambers and a two-channel gas mixing system assembled by using the
Swagelok tube fittings.\n\n\nReferences\n\n[R1] Janos Szanyi\, W. Kevin Ku
hn\, and D. Wayne Goodman J. Phys. Chem. 1994\, 98\, 2978-2981\n[R2] Oh\,
S.H.\; Fisher\, G. B.\; Carpenter\, J. E.\; Goodman\, D. W. J. Catal. 198
6\, 100\, 360\n[R3] Xu\, X.\; Szanyi\,J.\; Goodman\, D. W. Catal. Today\,
1994\,. 21\, 57.\n[R4] Griffiths\, P. R.\; Haseth\, J. A. d. Fourier Trans
form Infrared Spectrometry\, 2nd ed.\; John Wiley & Sons: New York\, 2007.
\n\nhttps://indico.inp.nsk.su/event/3/contributions/1255/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1255/
END:VEVENT
BEGIN:VEVENT
SUMMARY:New X-ray method for monitoring of polymers radiation crosslinking
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1256@indico.inp.nsk.su
DESCRIPTION:Speakers: Boris Tolochko (Institute of solid state chemistry a
nd mechanochemistry)\, Marat Sharafutdinov (ISSCM SB RAS\, BINP SB RAS)\nI
n this work the effect of radiation of relativistic electrons on the cryst
al structure of polyethylene after radiation crosslinking studied. The mai
n attention was paid to changes in the temperature of the Debye. The struc
ture factor equation given earlier yields the diffracted intensities as th
ough all atoms were stationary. As the temperature rises the atoms execute
increased excursions from their average position. Such excursions can inv
olve complex coupled motions of several atoms. However if one restricts co
nsideration to just the independent motions of each atom there is a relati
vely simple trick that can be used which is to (artificially) modify the a
tomic scattering factors\, f\, of each atom to represent the net broadenin
g of their electron clouds resulting from atomic motion. For example a giv
en atom will have its "stationary" f changed to fT according to: fT = f ex
p(−B sin2θ / λ2) where T is the temperature and B = 8π2u2 (units of A
2 )\, u2 being the root mean square displacement of the atom from its aver
age position. The B values are often referred to as B factors (Debye-Walle
r is a another\, similar\, term often used) and increase with temperature
(typical values are 0.2 to 0.8 A2 ). So clearly temperature will modify th
e diffraction intensities by changing the various values of f to fT in the
structure factor equation.\nTo determine the Debye powder X-ray series wa
s filmed at different temperatures of the polyethylene samples irradiated
by relativistic electrons.\nThe method allows to monitor the changes in th
e structure upon irradiation.\n\nhttps://indico.inp.nsk.su/event/3/contrib
utions/1256/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1256/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The formation of silver nanoparticles by synchrotron radiation and
relativistic electrons irradiating of water solution of silver salts
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1257@indico.inp.nsk.su
DESCRIPTION:Speakers: Boris Tolochko (Institute of solid state chemistry a
nd mechanochemistry)\nIt has been found that irradiation of aqueous soluti
ons of silver salts by synchrotron radiation start formation of silver nan
oparticles. Similar processes occur upon irradiation by relativistic elect
rons. In aqueous solution\, the silver particles are agglomerated into lar
ge particles of micron sizes. It was found surfactant\, preventing agglome
ration. The result is a stable colloid solution in which no precipitation
of particles within a few months.\n\nhttps://indico.inp.nsk.su/event/3/con
tributions/1257/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1257/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Cell for X-Ray investigation of new materials for Li-ion batteries
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1258@indico.inp.nsk.su
DESCRIPTION:Speakers: Yury Rusalev (Southern Federal University)\nLi-ion b
atteries are commonly used in our everyday life. However\, we face several
problems with their applications such as aging of the material inside\, n
ecessity of specific charge and discharge cycles\, low capacity and small
temperature range. In order to overcome these difficulties we have to und
erstand what is happening with the material inside the battery. The solut
ion to the problem is constructing a special experimental cell for X-Ray e
xperiments\, which would allow us to measure in-situ battery characteristi
c. \n\n Our experimental setup consists of two parts. First part is elect
ronics\, which allows measuring desired characteristics such as battery ca
pacity\, volt-ampere characteristic by charging and discharging the batter
y repetitively. Control unit of the electronic part is based on AVR micro
controller ATmega 2560 with 10-bit analog to digital converter. It allows
having up to 120 measurements per minute with 2 mV and 1 mA accuracy. Cont
rol of the power circuit is realized via 8-bit external multichannel digit
al to analog converter. In addition\, there is on-board USB-COM Bridge for
communication with specially designed computer software. This software p
rovides control of work regimes. Main functions are charge or discharge of
the battery\, measurement of capacity\, measurement of the level of charg
e\, cycling the battery with specific current in needed range of voltage a
nd charge or discharge to specific capacity.\n\n The second part is a spe
cial cylindrical cell consisting of two parts with thin replaceable conduc
ting and X-Ray transparent windows. One part is made from aluminum for cat
hode material and the other one is made from copper for anode material. Th
ey are separated with PTFE gasket. The design of cell allows to conduct XA
S\, XRD and other types of synchrotron and free electron laser experiments
.\n\nhttps://indico.inp.nsk.su/event/3/contributions/1258/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1258/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The structural study of gold catalytic nanosystems by XAFS method
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1259@indico.inp.nsk.su
DESCRIPTION:Speakers: Vladimir Kriventsov (Boreskov Institute of Catalysis
)\nE.P. Yakimchuk1\, V.V. Kriventsov1\, D. A. Bulushev1\, B.N. Novgorodov1
\, D.P. Ivanov1\, D.G. Aksenov1\, D.A. Zyuzin1\, N.S. Smirnova2\, S.A. Nik
olaev3\, A. Simakov4\, A.V. Chistyakov5\, A.S. Fedotov4\, D.O. Antonov5\,
M.V. Tsodikov5\n\n1) Boreskov Institute of Catalysis SB RAS\, Novosibirsk\
, Russia\n2) Institute of Hydrocarbons Processing SB RAS\, Omsk\, Russia.\
n3) Lomonosov Moscow State University\, Department of Chemistry\, Moscow\,
Russia\n4) Centro de Nanociencias y Nanotecnologia\, UNAM\, Ensenada\, B.
C.\, Mexico\n5) Topchiev Institute of Petrochemical Synthesis\, RAS\, Mosc
ow\, Russia\n\nThe structural study of gold catalytic nanosystems by XAFS
method\nThis work is devoted to a detailed structural study of the nanosiz
ed Au\, Au-Me stabilized forms located on oxide supports by XAFS method. I
t is a well known fact that metallic gold is most inert among the precious
metals due to its electronic structure\, nevertheless the nanosized Au\,
Au-Me forms located on oxide supports may be used as very active catalysts
for numerous industrially important reactions. These systems are very pro
mising for complex organic synthesis\, selective isomerization reactions
and for processes of environmental catalysts\, such as\, CO oxidation and
selective conversion of secondary alcohols. Reliable analysis of the natur
e of gold forms is extremely important for design of new effective gold ba
sed catalysts for different industrial applications. Synthesis of low-perc
entage ~ 0.2-2% Au\, Au-Me samples was carried out under varying preparati
on methods (impregnation\, deposition-precipitation with urea\, direct ion
exchange)\, calcination temperatures and activation methods. All XAFS spe
ctra (Au-L3 edge) of the studied samples were recorded at SSTRC\, Novosibi
rsk. The state of metal components and the local Au structure arrangements
of the prepared catalysts were studied. The Au-O\, Au-Au\, Au-Me interato
mic distances and corresponded coordination numbers were established. All
possible structural models were discussed. It was shown that different sta
bilized gold forms located on oxide supports were formed\, most probably d
epending on a sample prehistory: Au(3+) cations\, having octahedral oxygen
surrounding and metallic Au-Au\, Au-Me nanoparticles ~10-100Å. Some corr
elations between catalytic activities and structural functional properties
of the studied samples were shown. Additionally\, samples of catalysts we
re characterized by the TEM\, EDX\, XRD\, XPS methods. The data obtained b
y all the methods are in a good agreement. \n\nThe work was done using the
infrastructure of the Shared-Use Center “Siberian Synchrotron and Terah
ertz Radiation Center (SSTRC)” based on VEPP-3 of BINP SB RAS. This work
was supported by RFBR (140301066\, 163350248\, 163350249\, 163350250\, 16
0301139)\, SB RAS comprehensive program II.2P (Project 0305-2015-0018).\n\
nhttps://indico.inp.nsk.su/event/3/contributions/1259/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1259/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Synergistic influence of HF welding on nanostructiral orderliness
of epithelial tissues of gastrointestinal tract
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1261@indico.inp.nsk.su
DESCRIPTION:Speakers: Alvina Vazina (Institute of theoretical and experime
ntal biophysics\, RAS)\nThe results of study of influence of high-frequenc
y electrosurgical welding (HF welding) on molecular and nanostructiral ord
erliness of thin intestine tissues of a pig - mucosa\, submucosa\, muscle
layers\, serosa\, and also the purify mucin preparations from pig’s gast
rointestinal tract are presented. Structural study of biological tissues b
y X-ray diffraction methods with synchrotron radiation usage were carried
out on constructed by us small-angle station «diffraction cinema» DICSI
at the NRC «Kurchatov institute»\, Moscow. \nConsiderable distinctions o
n X-ray patterns of thin intestine tissues are registered before and after
HF welding: the X-ray patterns of native tissue display a small-angle dif
fuse scattering\; diffraction lines practically do not reveal. After appli
cation of HF welding\, the small-angle X-ray patterns of welded sutures in
intestinal tissue are literally filled with sharp diffraction rings: a se
ries of sharp Debye rings with main spacing of 4.65 nm was recorded within
the nanoscale range of 10 to 0.4 nm. We earlier attributed the nanostruct
ural invariant of 4.65(±0.15) nm as periodicity caused by regular attachm
ent of oligosaccharide chains to the protein core of giant proteoglycan mo
lecule of mucus and extracellular matrix of tissues [A. Vazina et al.\, B
ullet. RAS\, 2013\, 77(2)]. \nConsiderable changes in X-ray patterns of ga
strointestinal tissues under synergistic influence of various parametres o
f welding (temperature\, toolkit geometry\, pressure\, modulation of an el
ectromagnetic field\, etc.) can be interpreted by increase in concentratio
n of scattering components due to cold steam formation at acoustic excitat
ion of a site of a tissue between electrodes. \nThus\, under the influence
of welding in tissues it is formed high ordered proteoglycan scaffold pro
viding the functional arrangement of cells during reparation. Proteoglycan
systems can be not only a marker of the physiological status of a tissue\
, but also a regulator providing adequate adaptation of biological systems
to change of external parametres of environment. \nThe research was suppo
rted by RFBR-Moscow region Grant #14-44-03667.\n\nhttps://indico.inp.nsk.s
u/event/3/contributions/1261/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1261/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Structure and properties of ZnSxSe1-x alloy nanostructures embedde
d in anodic alumina membrane
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1262@indico.inp.nsk.su
DESCRIPTION:Speakers: Andrey Chukavin (Physical-Technical Institute of Ura
l Branch of RAS)\nZnSxSe1-x alloys\, as an important member of II–VI ter
nary semiconductors\, have attracted significant interest until now due to
their variable band gap\, spanning from 2.7 eV to 3.67 eV\, which makes t
hem appropriate for developing short wave length LEDs and laser diodes ope
rating entirely in the blue–violet region. Recently\, the ZnSxSe1-x allo
y nanostructures were synthesized by a variety of methods such as chemical
vapor deposition (CVD) and metal organic chemical vapor deposition [2-4].
The electronic structure and band gap of ZnSxSe1-x were also discussed [5
]. The design of ZnS ySe1-y/GaAs (001) heterostructures and their dynamica
l X-ray diffraction were reported [6\,7]. It is worthy to note that the 1D
ZnSxSe1-x-based ZnO/ZnSxSe1-x core/shell nanowire arrays\, ZnO/ZnSxSe1-x/
ZnSe double-shelled heterostructure and ZnS/ZnSxSe1-x nano-heterostructure
s have also been synthesized by chemical vapor deposition method or magnet
ic force assistant growth technique\, which exhibit efficient visible ligh
t absorption\, enhanced photoelectrochemical performance and integrating e
mission property\, respectively [8–10]. However\, the data on the optica
l absorption and photoluminescence spectra yielded different results for t
he ternary compounds produced by different methods\, and understanding of
the physical mechanism leading to this controversy is still not achieved.\
nThe semiconductor nanostructures in dielectric matrixes are of current in
terest due to absorption and luminescent properties improved in comparison
to thin films of materials [11\, 12]. In nanocrystals\, the surface-to-vo
lume ratio is considerably large\, therefore there is a high contribution
of surface in the luminescence properties. The unsaturated bonds on the su
rface create band-gap states that can easily capture the excited electrons
and holes and relax the energy in non-radiative ways [13]. In addition\,
matrix isolation allows to protect nanostructures from external influences
.\nIn this work we for the first time have successfully synthesized alloye
d ZnSxSe1–x nanowires embedded in a anodic alumina membrane via thermal
evaporation of the mixture of ZnS and ZnSe powders. Various compositions c
an be easily obtained by changing the mole ratio of ZnS to ZnSe in a sourc
e material. The X-ray diffraction patterns show that the lattice structure
of these nanostructures is cubic ZnSe-like\, as S atoms replace Se and na
nostructures compositions correlate with their initial S/Se ratio. Chemica
l composition was controlled by XPS method. Optical absorption spectra sho
w that band gaps of the alloy cover the entire range from 2.7 eV to 3.67 e
V by changing the component ratio\, in agreement with literature. The stud
y of the local atomic structure was carried out via EXAFS method. The set
of structural parameters\, namely the interatomic distances and correspond
ed coordination numbers\, were established. All possible structural models
were discussed in detail. Additionally ZnSxSe1–x samples were character
ized by the TEM\, EDX and XPS methods. The data obtained by all the method
s are in a good agreement.\n\n 1. Y. Liang\, H. Xu\, S. Hark\, // Cryst. G
rowth Des. V.10\, P.4206–4210\, 2010\;\n 2. S. Park\, H. Kim\, C. Jin\,
C. Lee. // Curr. Appl. Phys. V.12\, P.499–503\, 2012\;\n 3. J.P. Lu\, H.
W. Liu\, C. Sun\, M.R. Zheng et al. // Nanoscale\, V.4\, P.976–981\, 201
2\;\n 4. G.H.E. Al-Shabeeb\, A.K. Arof\, // Eur. Phys. J. Plus\, V.128\, P
.1–8\, 2013\;\n 5. T. Kujofsa\, A. Antony\, S. Xhurxhi et al. // J. Elec
tron. Mater. V.42\, P.3408–3420\, 2013\;\n 6. P.B. Rago\, E.N. Suarez\,
F.C. Jain\, J.E. Ayers // J. Electron. Mater. V.41\, P.2846–285\, 2012\;
\n 7. Z. Wang\, X. Zhan\, Y. Wang et al // Appl. Phys. Lett. V.101\, P.073
105-5\, 2012\;\n 8. Z. Wang\, H. Yin\, C. Jiang et al. // Appl. Phys. Lett
. V.101\, P.253109-5. 2012\;\n 9. W. Zhou\, R. Liu\, D. Tang\, B. Zou // C
ryst. Eng. Comm. V.15\, P.9988–9994\, 2013\;\n 10. S. Vijayalakshmi\, H.
Grebe\, Z. Iqbal and C.W. White // J. Appl. Phys.\, V.84\, P.6502\, 1998\
;\n 11. P. Persans\, T. Hayes and L. Lurio\, // J. Non Cryst. Solids\, V.3
49\, P.315-318\, 2004\;\n 12. N. Taghavinia and T. Yao // Physica E\, V.21
\, P.96-102\, 2004.\n\nhttps://indico.inp.nsk.su/event/3/contributions/126
2/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1262/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Propagation of beams with orbital angular momentum through 1D and
2D periodic grating (an analogue of the Talbot effect)
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1263@indico.inp.nsk.su
DESCRIPTION:Speakers: Oleg Kameshkov (Novosibirsk State University)\, Yuli
a Choporova (Budker Institute of Nuclear Physics)\nTalbot effect (self-ima
ging of periodic gratings) attracted attention for 170 years that have pas
sed since its discovery. The invention of lasers generating coherent beams
caused a new impetus to these studies. Commissioning of the Novosibirsk f
ree electron laser facility\, which generates powerful coherent monochroma
tic radiation in the terahertz range\, enabled us to demonstrate recently
the Talbot effect in this region of the spectrum. Large wavelength of the
terahertz radiation enables performing experiments with gratings\, fabrica
ted using LIGA technology at synchrotron radiation source VEPP-4\, the str
uctural elements of which are close to the wavelength. In this paper we de
scribe first observation of diffraction patterns in the free space region
behind the periodic structures illuminated with beams carrying orbital ang
ular momenta with topological charges equal to plus-minus 1 or 2. The imag
es observed did not reproduce images of the gratings exactly\, but manifes
ted some periodicity inherent to the Talbot effect with distorted spots re
lated to individual grating openings. The numerical simulation of the elec
tromagnetic field behind the gratings\, carried out in a frame of the Fres
nel-Kirchhoff model\, is compared with the experimental data.\n\nhttps://i
ndico.inp.nsk.su/event/3/contributions/1263/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1263/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Cooling of the superconducting magnet with nitrogen-filled heat pi
pes.
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1264@indico.inp.nsk.su
DESCRIPTION:Speakers: Valeriy Tsukanov (BINP)\nThe paper describes usage o
f nitrogen-filled heat pipes for pre-cooling of the superconducting wiggle
r with "dry" cryostat (ANKA/CLIC Superconducting multipole wiggler 2015).\
nIn our design the first stages of cryo-coolers are connected to the magne
t yoke by two heat pipes\, which provide high heat transmission rate (up t
o 100 W per tube) in the temperature range from 300K down to 70K. When the
nitrogen reaches its freezing point\, an automatic thermal contact gap oc
curs. The heat pipes allowed us to exclude usage of liquid nitrogen from t
he process of pre-cooling of the magnet.\n\nhttps://indico.inp.nsk.su/even
t/3/contributions/1264/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1264/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The SR-XRFA usage in biogeochemical studies: element composition o
f larch tissues (Larix cajanderi Mayr.) of Kuranakh Gold Mining area (Rus
sia\, Yakutia)
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1265@indico.inp.nsk.su
DESCRIPTION:Speakers: Svetlana Artamonova (IGM SB RAS)\nThis article is de
voted to the problem of biogeochemical peculiarities of plant of mining go
ld ore deposit zone. The tissues of larch (Larix cajanderi Mayr.) were the
object of our studies using of X-ray fluorescence elemental analysis with
synchrotron radiation (SR-XRF) method. Large possibilities of SR-XRFA\, a
long with the simple preparation of biological samples\, allowed us to car
ry out valuable biogeochemical investigations in Kuranakh Gold Mining area
(Russia\, Yakutia). New data on the accumulation of biophilic microelemen
ts Cu\, Zn\, Mo\, chalcophilous Ni\, Pb\, Ag\, As\, Sb\, rare lithophilous
Rb\, Sr\, Zr\, Y\, Nb\, scattered chalcophilous Ga\, Ge\, Se\, Cd\, Te\,
Tl in the tissues of larch (Larix cajanderi Mayr.) of gold ore deposit are
as and of gold wastes tailings were obtained. \nThe changes of elemental c
omposition of plant under technogenic impact in area of tailings and in ar
eas of natural geochemical anomalies of ore deposits is very significant t
o assessment ecological risk of technogenic impact in mining areas.\n\nhtt
ps://indico.inp.nsk.su/event/3/contributions/1265/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1265/
END:VEVENT
BEGIN:VEVENT
SUMMARY:An inverse method of structured X-ray screen manufacturing
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1266@indico.inp.nsk.su
DESCRIPTION:Speakers: Vladimir Nazmov (Budker Institute of Nuclear Physics
)\nIt is shown that the spatial resolution of an X-ray screen can be incre
ased by forming structures like channels which are filled with a phosphor
[V.I.Kondratiev\, M.V.Kuzin\, N.A.Mezentsev\, L.A.Mezentseva\, V.P.Nazmov\
, Yu.T.Pavlyukhin\, A.Krasnoperova\, V.F.Pindyurin\, A.A.Sidelnikov\, B.P.
Tolochko\, Preliminary testing of microstructured imaging plates with impr
oved spatial resolution. Nucl.Instr.Meth.Phys.Res.A448 (2000) 207-210]. It
is established that the diameter of the channel is smaller\, the higher s
patial resolution can be achieved. However\, the problem of filling of nar
row channels is increasing. In the proposed method\, the phosphor has been
mixed with the structured material SU-8 - resist and the patterning is ca
rried out. Thus\, the need of filling of channels with a phosphor disappea
rs. Due to the high penetration depth of hard X-rays into the materials du
ring the patterning step\, regardless havy elements inside Gd2OS2 as a pho
sphor\, the height of patterned microstructures can achieve tens or hundre
ds of micrometers. The optical isolation of the patterned phosphor pillars
is carried out by electroplating of nickel betweeen the pillars. The achi
eved spatial resolution and the details of the manufacturing process heve
been discussed.\n\nhttps://indico.inp.nsk.su/event/3/contributions/1266/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1266/
END:VEVENT
BEGIN:VEVENT
SUMMARY:МETHOD FOR MANUFACTURING SELF-BEARING MICROSTRUCTURES OF THE PSEU
DO-METALLIC TYPE
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1267@indico.inp.nsk.su
DESCRIPTION:Speakers: Aleksandr Gentselev (Budker INP\, Novosibirsk\, Russ
ia)\nWe consider the peculiar features of the LIGA-technology methods elab
orated in the Siberian Synchrotron and Terahertz Radiation Centre (SSTRC\,
BINP SB RAS) and applied to producing quasi-optical subterahertz filters
and focusing elements based on high-aspect self-bearing microstructures of
the pseudo-metallic type. The essence of the method consists in deep X-ra
y lithographic patterning of an organic glass (PMMA) substrate followed by
covering its entire surface with a thin layer of metal (Ag or Al). The re
sults of manufacturing the inductive microstructures with geometry of hone
ycomb arrays\, including high-pass filters with the cut-off frequency of 0
.28 THz and focusing elements operating at 0.65 THz\, are presented. The d
etails of spectral characterization of the developed structures using a BW
O-spectroscopy technique are discussed. Good agreement between the results
of measurements and numerical simulations is demonstrated.\n\nhttps://ind
ico.inp.nsk.su/event/3/contributions/1267/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1267/
END:VEVENT
BEGIN:VEVENT
SUMMARY:NEXAFS study of molecular arrangement in polyaniline films prepare
d by electrochemical deposition
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1268@indico.inp.nsk.su
DESCRIPTION:Speakers: Alexander Syugaev (Physical-Technical Institute UB R
AS\, Izhevsk\, Russia)\nNanoscale films based on conductive polymers and p
olyaniline/polypyrrole multilayers are of great interest and may be used i
n various applications such as protective and antielectrostatic coatings\,
membranes\, sensors\, capacitors\, etc. Physical-chemical properties of p
olyaniline films depend on their molecular arrangement. Up to date\, the e
ffect of the electrochemical synthesis conditions on the chemical structur
e and molecular orientation in the films is far from being comprehensively
studied. In the work\, the polarization-dependent NEXAFS spectra were use
d to obtain the data on the molecular arrangement in a relatively thick (~
1 micron and thicker) polyaniline films. The influence of different parame
ters of electrosynthesis was investigated such as polarization potentials\
; polarization modes (potentiostatic\, cyclic)\; growth from still/stirrin
g electrolyte solution. XPS and NEXAFS spectra were measured at the dipole
Russian-German beamline at the BESSY II\, HZB Berlin.\n\nIn most films\,
the polarization-dependent NEXAFS spectra have shown a preferential orient
ation of the macromolecular chains of polyaniline in the surface layer of
the films. The films are arranged differently depending on the preparation
conditions. For example\, at the initial stages of the deposition under p
otentiostatic conditions in stirring electrolyte\, most of the aromatic ri
ngs of the polymer molecules are arranged along with the film surface. Wit
h increasing deposition time\, a preferential molecular orientation disapp
ears. For the film prepared under the same conditions\, but in still elect
rolyte\, there is significant polarization effect\, indicating that the ar
omatic rings are arranged perpendicular to the sample surface. However\, t
he polymer chains themselves are oriented along with the sample surface. S
uch an orientation of the molecules can be assigned to the capture of macr
omolecular fragments and oligomers from the near-electrode layer\, in whic
h these fragments are accumulated.\n\nThe work was supported by the Russia
n Foundation for Basic Research (grant № 16-43-180228) and the Russian-G
erman Laboratory at BESSY II\, HZB Berlin.\n\nhttps://indico.inp.nsk.su/ev
ent/3/contributions/1268/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1268/
END:VEVENT
BEGIN:VEVENT
SUMMARY:MANUFACTURING LIGA-MASKS WITH LASER MICROMACHINING
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1269@indico.inp.nsk.su
DESCRIPTION:Speakers: Aleksandr Gentselev (Budker INP\, Novosibirsk\, Russ
ia)\nIn the LIGA-technology\, the first stage in forming a micro-relief is
the deep X-ray lithography which is implemented\, as a rule\, by using sy
nchrotron radiation (SR) of the wavelength spectral range λ ≈ 1÷3 Ǻ.
Realization of this technology implies availability of a high-contrast X-r
ay mask (LIGA-mask) containing X-ray opaque topological drawing which is n
ormally formed via galvanic deposition of heavy metals on the surface of a
X-ray transparent bearing membrane. It is worth noting that a number of p
roducts made with the LIGA-technology\, e.g. quasi-optical terahertz filte
rs and focusing elements are characterized by self-bearing topology. It op
ens up a possibility of the structure’s production by means of the alter
native but significantly simpler technology – laser cutting of a metal f
oil that allows eliminating the bearing membrane and excludes technologica
l problems related with electroplating. \nIn this work\, we describe the r
esults of experiments with two different laser systems based on solid-stat
e pulsed lasers (λ1 ≈ 1064 nm\, λ2 ≈ 532 nm\, pulse duration ~ 10 ns
) which were utilized for producing LIGA-masks via patterning brass and le
ad foils 50 um thick. The best results from the viewpoint of the cut edge
roughness were obtained with a brass foil patterned with the 1064-nm-laser
which provided the average roughness size ~ ±2÷3 um. The technological
constraints imposed by the proposed laser technique on the structural geom
etrical parameters of LIGA-masks\, as well as the ways for their mitigatio
n are discussed.\n\nhttps://indico.inp.nsk.su/event/3/contributions/1269/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1269/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Hybrid magnet wiggler for SR research program at VEPP-4M
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1270@indico.inp.nsk.su
DESCRIPTION:Speakers: Grigory Baranov (Budker Institute of Nuclear Physics
)\nA compact hybrid magnet wiggler is under development for the VEPP-4 SR
research program. The wiggler allows to increase the photon flux by two or
ders at the beam energy 4.5 GeV in the spectrum range of 60-100 keV. The m
agnet consist of conventional coils which generate magnetic field and perm
anent magnet insertions which concentrate the flux. The solution increases
field at the beam orbit up to 2.05 T. Here we present design\, magnetic c
alculations and analysis of the beam dynamics under hybrid wiggler influen
ce.\n\nhttps://indico.inp.nsk.su/event/3/contributions/1270/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1270/
END:VEVENT
BEGIN:VEVENT
SUMMARY:EXAFS\, XANES and XRD investigations of doped ZnS nanostructures
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1271@indico.inp.nsk.su
DESCRIPTION:Speakers: Vladimir Kriventsov (Boreskov Institute of Catalysis
)\nR.G. Valeev1\, A.N. Beltiukov1\, A.I. Chukavin1\, A.L. Trigub1\,2\, V.V
. Kriventsov3\, N.A. Mezentsev4\n\n1) Physical-Technical Institute of UB R
AS\, Izhevsk\, Russia\n2) NSC “Kurchatov’s Institute”\, Moscow\, Rus
sia\n3) Boreskov Institute of Catalysis of SB RAS\, Novosibirsk\, Russia\n
4) Budker Institute of Nuclear Physics of SB RAS\, Novosibirsk\, Russia\n
\nIn the current state of materials science the considerable attention has
devoted to the study of new materials for light emitting devices. Light e
mitting electroluminescent panels based on powders and thin films have fou
nd wide application in electroluminescent devices\, character displays\, b
acklight panels of advertising constructions. One major drawback of such d
evices is using high frequency and high voltage AC power sources. Traditio
nal materials for electroluminescent light sources are powders and films o
f zinc sulfide doped with copper\, chlorine\, manganese and other elements
. It was established that a wavelength and intensity of light depends on t
he concentration and type of dopands\, i.e. there are circumstances under
which it is possible to provide a source of white light emission. But alon
g with the advantages of electroluminescent light sources\, there are sign
ificant disadvantages: high energy consumption\, the need for specific pow
er supplies and short operation time. This is due to degradation of the ac
tive layer under specific principles of operation of such devices in extre
mely high electric fields (before breakdown luminescence). \nIn this work
we use templating approaches based on the formation of doped ZnS particles
in the porous alumina membranes with highly ordered channels with control
led diameter. It is necessary to identify the influence of synthesis condi
tions on the structure and electrical properies\, (including light emittin
g)\, properties of materials. All this defines the scope of application of
SR methods. EXAFS\, XANES and XRD\, as powerful probe instruments in inv
estigations of doped ZnS nanostructures for the creation of a new class of
fluorescent materials to form the basis of their layers for high-performa
nce and high-brightness light-emitting electroluminescent panels. \nSome c
hanges of the phase compositions and local structure arrangements of the s
tudied ZnS doped samples (different compositions and preparation ways) wer
e characterized in detail. The interatomic distances and corresponded coor
dination numbers were revealed. All possible structural models were discus
sed. Some correlations between their properties\, local structure distorti
ons and state of doped components were established.\nThis work is supporte
d by Russian Scientific Foundation (Project № 15-19-10002)\, SB RAS comp
rehensive program II.2P (Project 0305-2015-0018).\n\nhttps://indico.inp.ns
k.su/event/3/contributions/1271/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1271/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Structural investigations of Ni deposited on porous anodic alumina
matrices
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1272@indico.inp.nsk.su
DESCRIPTION:Speakers: Andrey Chukavin (Physical-Technical Institute of UB
RAS)\, Vladimir Kriventsov (Boreskov Institute of Catalysis)\nR.G. Valeev1
\, V.V. Stashkova2\, A.I. Chukavin1\, V.V. Kriventsov3\, N.A. Mezentsev4\n
\n1) Physical-Technical Institute of UB RAS\, Izhevsk\, Russia\n2) Udmurti
a State University\, Izhevsk\, Russia\n3) Boreskov’s Institute of Cataly
sis of SB RAS\, Novosibirsk\, Russia\n4) Budker Institute of Nuclear Physi
cs of SB RAS\, Novosibirsk\, Russia\n\nIron\, nickel\, cobalt\, platinum
and other 3d and platinum group metals\, their alloys and intermetallic c
ompounds are traditionally used as cathodes in electrolytic hydrogen evolu
tion reaction (HER) in aqueous acid and alkaline solutions [1]. Nickel sta
nds out among them because of the fact that\, having high corrosion resist
ance in acidic and alkaline media compared with platinum group metals\, it
has a low cost and so is widely used [2\,3]. It should be noted that the
efficiency of HER depends on the area of contact of the cathode material w
ith the electrolyte\, so there is an increased interest in literature to t
he nickel based materials having a developed surface due to the formation
of metal nanoparticles with different morphology [4]. This is due to the l
arge contribution of surface electronic states of the metal in HER. It is
also strongly affected by the structural-phase state and local atomic and
electronic structure causing nickel chemical activity.\nThe aim of this wo
rk is to develop methods of magnetron sputtering nickel on high surface ar
ea membranes of a porous anodic alumina morphology and to study the struct
ural-phase state\, local atomic and electronic structures of the samples\,
depending on the parameters of the Al2O3 porous structure (the pore diame
ter\, the distance between the individual pores). \nAs a result of a compl
ex study (XAFS\, XRD\, SEM)\, the state and local structure of samples obt
ained by few ways were revealed. The geometrical characteristics of Ni nan
ostructures\, their crystalline and local atomic structure were studied. T
he local atomic structure parameters were compared to those revelaed in in
vestigations of the nickel film obtained on smooth Al2O3 surface. All poss
ible structural models were discussed in detail. \nThis work is supported
by program “Umnik” (Grant № 0020390)\, SB RAS comprehensive program
II.2P (Project 0305-2015-0018).\n\n1. L.A. Kibler\, ChemPhysChem 7\, 985 (
2006).\n2. W.A. Badawy\, H. Nady\, et al.\, Int. J. Hydr. Energy 39\, 1082
4 (2014)\n3. J. Panek\, A. Budniok\, Surf. Interface Anal. 40\, 237 (2008)
.\n4. D.A. Dalla Corte\, C. Torres\, et al.\, Int. J. Hydr. Energy 37\, 30
25 (2012).\n\nhttps://indico.inp.nsk.su/event/3/contributions/1272/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1272/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Analytical study of terahertz spoof surface plasmons on corrugated
metal-dielectric structures
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1273@indico.inp.nsk.su
DESCRIPTION:Speakers: Vasily Gerasimov (Budker Institute of Nuclear Physic
s SB RAS)\, Vladislava Bulgakova (Budker Institute of Nuclear Physics SB R
AS)\nResults of analytical and numerical analysis of characteristics of sp
oof surface plasmons on corrugated metal-dielectric structures in terahert
z region will be presented\n\nhttps://indico.inp.nsk.su/event/3/contributi
ons/1273/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1273/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Beam parameter measurements and demonstration of UED at the KAERI
ultrashort pulse facility
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1274@indico.inp.nsk.su
DESCRIPTION:Speakers: Hyun Woo Kim (UST\, KAERI)\nWe developed an ultrasho
rt pulse facility for pump-probe experiments at the Korea Atomic Research
Institute (KAERI). This facility composed two ultrafast electron diffracti
on (UED) experiments for gas target and solid target.We measured beam para
meters and demonstrated UED. We will present on results of beam parameter
measurements and UED experiments.\n\nhttps://indico.inp.nsk.su/event/3/con
tributions/1274/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1274/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Interaction of monochromatic terahertz surface plasmons with plane
mirrors
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1275@indico.inp.nsk.su
DESCRIPTION:Speakers: Alexey Nikitin (Scientific and Technological Center
for Unique Instrumentation of RAS)\, Vasily Gerasimov (Budker Institute of
Nuclear Physics SB RAS)\nExperimental results of study of reflection and
diffraction of surface plasmons generated using monochromatic terahertz ra
diation of Novosibirsk free-electron laser will be presented\n\nhttps://in
dico.inp.nsk.su/event/3/contributions/1275/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1275/
END:VEVENT
BEGIN:VEVENT
SUMMARY:XANES investigation of the chromium dichalcogenides CuCr1-x
M’S2 and MCrX2
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1281@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 c
hromium dichalcogenides MCrX2 (M = Cu\, Ag\, Na\, X = O\, S\, Se) are prom
ising materials for modern electronics. These materials have the potentia
l properties for practical usage : ionic conductivity [1]\, thermoelectric
properties [2]\, magnetic arrangement[3-4]\, colossal magnetoresistance\,
phase metal-insulator transition [4].\nThere are several different ways o
f purposeful control of electric and magnetic properties of the chromium d
ichalcogenides MCrX2: cationic substitution of the chromium atoms with van
adium\, iron or manganese atoms (CuCr1-xM'xS2\, M' = V\, Fe\, Mn)\, co-int
ercalation of different kinds of atoms into the van-der-waals gap (for exa
mple silver in the Cu1-xAgxCrS2)\, changing type of the chalcogen (CuCrX2\
, X = S\, Se\, Te).\nSynthesis of functional materials based on MCrX2 with
necessary properties requires distribution control of atoms on the crysta
llographic positions in the crystal lattice. This parameter essentially de
pends on technology of synthesis. In this regard\, it is appropriate to us
e physical methods sensitive to the character of the local environment of
atoms in synthesized samples. The XANES-spectroscopy can be used as such m
ethod (XANES - X-ray Near Edge Structure).\nIn the present study a complex
experimental and theoretical investigation of the XANES-structures of X-r
ay absorption K-edges of intercalated MCrX2 (M = Cu\, Ag\, X = O\, S\, Se)
and cation-substituted dichalcogenides CuCr1-xM'xS2\, (M' = V\, Fe\, x =
0-0.40) have been carried out. Based on these data the influence of cation
substitution of chromium atoms and the influence of types of the chalcoge
ns and the intercalates to the near fine structure of X-ray absorption spe
ctra of the elements in the dichalcogenides CuCr1-xVxS2 and MCrX2 (M = Cu\
, Ag\, X = O\, S\, Se) have been investigated.\nThe reported investigation
was funded by RFBR according to the research\n project No. 16-32-00612.\n
[1] Almukhametov R.F.\, Yakshibaev R.A.\, Gabitov E.V. et al. // Phys. Sta
t. Sol. (b). – 2003. – 236\, N 1. – P. 29 – 33.\n [2] Srivastana D
.\, Tewari G.C.\, Kappinen M.\, Nieminen R.M. // J. Phys.: Condens.Matter.
– 2013. – 25\, N. 3 – P. 105504.\n[3] Karmakar A.\, Dey K.\, Chatt
erjee S. et al. // Appl. Phys. Letters. – 2014. –104\, N. 5. – P. 05
2906.\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/ev
ent/3/contributions/1281/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1281/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Experimental modeling of the impulse diffraction system with a "wh
ite" SR beam.
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1282@indico.inp.nsk.su
DESCRIPTION:Speakers: Mihail Fedotov (BINP)\nSome matrix detectors (CCD an
d CIS) have direct X-ray sensitivity and can operate as dispersionless spe
ctrometers with a very large number of elements (10E6 and more). In the ca
se of the impulse diffraction such detector can simultaneously record a si
gnificant number of independent events. In the reading the position and en
ergy of the absorbed X-ray photon may be restored for each event. The math
ematical processing of the received data with respect to the Bragg conditi
on can theoretically lead to the coordinates of the events of one fixed en
ergy and to form an analogue of powder diffraction patterns. In this case
the registration can be performed on the "white" SR beam for a short time
(up to 1 ns or less). \n \nThe possibility of using of the 2000-elemen
t linear CCD ILX511 (Sony) as X-ray dispersionless spectrometer allowed to
conduct simulation experiments to obtain diffraction patterns of graphite
\, boron nitride and TNT-hexogen solid detonation products. SR beam was mo
dulated by a mechanical chopper and statistics were provided by a multiple
recording with on-line processing.\n\nhttps://indico.inp.nsk.su/event/3/c
ontributions/1282/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1282/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The system for monitoring of the fast vertical oscillations of VEP
P-3 SR beam
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1283@indico.inp.nsk.su
DESCRIPTION:Speakers: Mihail Fedotov (BINP\, NSU)\nDue to the presence of
a ripple on the output of various power sources\, and mechanical vibration
s the VEPP-3 wiggler beam is subject to certain perturbations (oscillation
s). Such disturbances can distort the results of precise experiments. At t
he same time the existing stabilization system of the SR beam works with a
large averaging times and almost not sensitive to these disturbances. \n\
nThe differential high-speed detector based on pin-photodiodes and electro
nic processing circuits (that provide filtering and correlated double samp
ling of the signals) was developed for observation of the SR beam vertical
oscillations. Detector is supplemented by electromechanical system for au
tomatically adjustment of the sensor in beam center and allows to record s
low displacement with a resolution of up to 0.2 microns.\n\nThe measuremen
ts showed the presence of perturbations on the harmonics (50\, 100\, and 3
00 Hz) and subharmonic (25 Hz) of power supply. In addition\, the frequenc
ies of 20 or 21.5 kHz were observed too\, that is possibly related to the
sources of the inverter type.\n\nIt is expected that in the future this sy
stem can be connected to fast correctors of VEPP-3 storage ring for feedba
ck suppression of the beam oscillations.\n\nhttps://indico.inp.nsk.su/even
t/3/contributions/1283/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1283/
END:VEVENT
BEGIN:VEVENT
SUMMARY:SR micro-XRF installation on VEPP-3 storage ring. Possibilities in
increasing the spatial resolution.
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1284@indico.inp.nsk.su
DESCRIPTION:Speakers: Dmitry Sorokoletov (Budker Institute of Nuclear Phys
ics SB RAS)\nTo investigate the possibility of increasing the spatial reso
lution of the installation "SR micro-XRF" [1]\, we conducted earlier an ex
periment on the elemental mapping of one-dimensional test sample (a fragme
nt of an RF bipolar transistor chip\, containing a number of gold stripes)
\, as well as processing of some of the experimental results (one mapping
line) [2-3] using the classical Tikhonov regularization algorithm [4\, p.
73]. In this work we present the results of the processing of all data of
this experiment (by two variational realizations [4\, p. 119] of the Tikho
nov algorithm) and a detailed analysis of the results. For example\, we pe
rformed a numerical simulation of the direct and inverse deconvolution pro
blems. We did that for cases with different resolutions\, to study the pla
usibility of the results of solving the deconvolution problem. We also ana
lyzed the influence of certain effects that cause systematic errors in the
calculations and the resulting solution.\n\nAs a result of this work\, we
found out that it was very difficult to practically increase the spatial
resolution 3 times (which corresponds to the distance between the gold str
ipes of the sample and their width of 5 μm at an FWHM of the lens instrum
ental function of 15 μm)\, while it was theoretically possible\, on the "
SR micro-XRF" installation with the available intensities of fluorescent s
ignals and noise levels. A quantitative analysis of the reasons for this i
s discussed in this work and illustrated in detail in a number of model ca
ses. At the same time\, in certain experimental mapping regimes\, the achi
evable resolution can be increased 1.5-2 times (provided there are no sign
ificant systematic errors in the calculations).\n\nThe results of the rese
arch will help to plan subsequent mapping experiments (they showed that th
e data of the mapping conducted earlier were ill-suited to processing beca
use of non-optimal experimental regime\, which led to a substantial system
atic error with the desired 3-fold resolution increase\, because of the ed
ge effects and not too good signal-to-noise ratio).\n\nThis work was suppo
rted by the RFBR Grants № 14-02-00631\, 16-32-00705. The work by D.S. So
rokoletov was supported by a scholarship of the President of the Russian F
ederation (SP-2761.2016.2).\n\nReferences\n\n[1] http://ssrc.inp.nsk.su/CK
P/stations/passport/3/\n\n[2] Sorokoletov D.S.\, Rakshun Ya.V. "Some aspec
ts of quantitative micro-XRF based on the use of polycapillary lenses" //
Book of Abstracts. The International Joint School «Smart Nanomaterials an
d X-Ray Optics 2015: Modeling\, Synthesis and diagnostics» for young rese
archers. Rostov-on-Don\, 26-30\, September\, 2015. (ISBN 978-5-98615-164-9
)\n\n[3] Sorokoletov D.S.\, Rakshun Ya.V. "An Tikhonov regularizing method
in micro-XRF inverse problem on example of the studying of a test sample
- a fragment of an RF bipolar transistor chip (in Russian)" // Book of Ab
stracts. The Young Scientist School «Applications of synchrotron and\nter
ahertz radiation for studies of high energy materials». Biysk\, 15-20\, S
eptember\, 2015.\n\n[4] Leonov A.S. Solving ill-posed inverse problems: es
say on the theory\, practical algorithms\, and demonstrations in Matlab (i
n Russian). Second edition. Moscow\, "Publishing House "Lybrokom"". 2013.
336 p.\n\nhttps://indico.inp.nsk.su/event/3/contributions/1284/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1284/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Influence of a LIGA-raster on the spatial distribution of the radi
ation from a flash X-ray generator
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1285@indico.inp.nsk.su
DESCRIPTION:Speakers: Vladimir Nazmov (Budker Institute of Nuclear Physics
)\nThe development of essentially new methods of manufacturing of X-ray op
tics in the energy range 20-200 keV is a challenge. Namely\, the developme
nt of manufacturing methods of X-ray rasters with high aspect ratio and\,
on substrates of any forms\, using LIGA technique. \nA spherical X-ray wav
e can be formed\, placing a foil with microchannels onto a spherical surfa
ce either near the X-ray focus or away from the focus. In case of a plane
raster\, the quasi-plane wave with a divergence determined by the ratio of
the diameter to the lengths of channels will be formed. At the same time\
, for X-ray tubes of all the types\, including flash generators applied at
the Institute of Hydrodynamics SB RAS for the diagnostic of high-speed an
d explosive processes\, a three-dimensional microraster can be used as a c
ollimator. That allows a decreasing of the visible source size\, resulting
in an increasing of the spatial coherence of the X-ray beam. \nIn the exp
eriment\, a flat nickel raster of 1250 microns thick\, whose channels are
80 microns in diameter\, and manufactured using LIGA technique\, has been
applied. For a flash X-ray device with an explosive electron emission and
a bias of 150 kV\, the angular divergence was reduced from 180 degrees to
3 degrees (FWHM)\, i.e. 60 times. The quasi-parallel X-ray beam along the
axis passing from the center of the focus and perpendicular to the raster
was formed. The beam diameter is similar to the focus size in the near fie
ld and divergent (with an angular divergence of 3 degrees) in the far fiel
d.\nBecause of non-zero raster transparency\, a background of scattered ra
diation has been observed. The intensity of the background is characterize
d by the sixth order of symmetry that corresponds to the raster symmetry.
\nThus\, the opportunity of the use of microraster manufactured by means o
f LIGA for the increase of spatial coherence of X-rays is experimentally d
emonstrated.\n\nhttps://indico.inp.nsk.su/event/3/contributions/1285/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1285/
END:VEVENT
BEGIN:VEVENT
SUMMARY:IN-SITU INVESTIGATION OF THERMO-STIMULATED DISSOLUTION OF HYDRIDES
IN TITANIUM AND ZIRCONIUM BY MEANS OF SHORT-WAVE DIFFRACTION OF SYNCHROTR
ON RADIATION
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1287@indico.inp.nsk.su
DESCRIPTION:Speakers: Roman Laptev (National Research Tomsk Polytechnic Un
iversity)\nTitanium and zirconium alloys are widely used in medicine\, che
mical and oil industries\, aircraft industry\, in nuclear power industry.
Hydrogen penetration and accumulation in titanium and zirconium products l
ead to its properties and can lead to the delayed fracture due to the hydr
ogen embrittlement [1-4].\n\n Degree of hydrogen impact on the titanium an
d zirconium properties depends on its concentration and condition in metal
. Hydrogen saluted in lattice has a low impact on properties of the metal.
However\, hydrogenation under operation of titanium and zirconium alloys
often occurs with hydrides formation. As a consequence\, investigation of
hydrides formation and dissociation in titanium and zirconium has both fun
damental and practical interest.\n\nSamples of commercially pure titanium
alloy and Zr1%Nb zirconium alloy were instigated in this work. Hydrogenati
on was done by gas-phase method at temperature 600 °C and hydrogen pressu
re 1 atm. Spectrum of hydrogen thermo-stimulated desorption from samples a
fter hydrogenation were obtained with the help of automated complex Gas Re
action Controller LPB with mass-spectrometer RGA100. \n\nIn situ diffracti
on measurements were carried out in the process of samples heating at the
station "Precision diffractometry II» of the Institute of Catalysis of th
e Siberian Branch of the Russian Academy of Science at the 6 synchrotron r
adiation channel of the VEPP-3 electron storage ring. \n\nComparison of th
e data obtained in the analysis of hydrogen desorption curves with data of
the phase transitions in the zirconium-hydrogen and titanium-hydrogen sys
tems at the heating allowed describing the processes occurring in zirconiu
m and titanium hydrides under thermal treatment. \n\n1. C.P. Liang\, H.R.
Gong. Fundamental influence of hydrogen on various properties of alph-tita
nium // International Journal of Hydrogen Energy 35 (2010) 3812-3816.\n2.
Madina V.\, Azkarate I. Compatibility of materials with hydrogen. Particul
ar case: hydrogen embrittlement of titanium alloys // International Journa
l of Hydrogen Energy. 2009. No. 34. P. 5976-5980.\n3. Silva K.-R.F.\, DosS
antos D.S.\, Robeiro A.F.\, Almeida L.H. Hydrogen diffusivity and hydride
formation in rich-zirconium alloys used in nuclear reactors // Defect and
Diffusion Forum. 2010. Vol. 297- 301. P. 722-727.\n4. Zielinski A.\, Sobie
szczyk S. Hydrogen-enhanced degradation and oxide effects in zirconium all
oys for nuclear application // International Journal of Hydrogen Energy.
2011. Vol. 36. P. 8619-8629.\n\nhttps://indico.inp.nsk.su/event/3/contribu
tions/1287/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1287/
END:VEVENT
BEGIN:VEVENT
SUMMARY:New RF gun for Novosibirsk ERL FEL
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1288@indico.inp.nsk.su
DESCRIPTION:Speakers: vladimir volkov (BINP SB RAS)\nIn BINP SB RAS the ne
w rf gun making an intensive high-quality electron beam for injecting in N
ovosibirsk microtron recuperator (ERL) and driving Free Electron Laser (FE
L) is made. Bench tests of rf gun confirmed good results in strict accorda
nce with the calculations predicting average current of a bunch of 100 м
А\, energy of particles of 400 кэВ and an emittance ≤ 15 microns. Th
e rf gun stand testing showed reliable work\, unpretentious for vacuum con
ditions and stable in long-term operation. The bunch injection system buil
t-in to the existing system of the microtron injector with the static gun
and keeping high quality of bunches is developed and designed.\n\nhttps:/
/indico.inp.nsk.su/event/3/contributions/1288/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1288/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Properties of quarter wavelength coaxial cavity for triode-type th
ermionic RF gun
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1290@indico.inp.nsk.su
DESCRIPTION:Speakers: Konstantin Torgasin (Graduate School of Energy Scien
ce\, Kyoto University)\nSome infrared FEL facilities apply thermionic RF g
uns due to their advantage of compactness and cost effectiveness as compar
ed to RF photocathode electron guns. Other remarkable advantages are the l
ong lifetime and low vacuum condition requirements. On the other hand ther
mionic RF guns are suffering from back-bombardment phenomena\, which limit
s the bunch charge and macro-pulse duration. In order to overcome this dis
advantage a novel configuration named as triode-type thermionic RF gun\, w
hich has an additional small pre-bunching cavity around the cathode\, was
developed at Institute of Advanced Energy (IAE)\, Kyoto University. The tr
iode concept has already been proved by numerical simulation. For a proof
of principle experiment\, a quarter wave pre-bunching cavity was fabricate
d. The cold test of the quarter wave pre-bunching cavity at high and low R
F power has been completed. In this work we report results of hot test of
the cavity.\n\nhttps://indico.inp.nsk.su/event/3/contributions/1290/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1290/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The End-Station "NanoPES" at the Kurchatov synchrotron radiation s
ource: Present status and prospects
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1292@indico.inp.nsk.su
DESCRIPTION:Speakers: Ratibor Chumakov (NRC "Kurchatov Institute")\nThe En
d-station "NanoPES"\, currently under construction\, is intended for the i
mplementation of techniques for angle-resolved photoemission spectroscopy
(ARPES)\, NEXAFS\, LEED\, SPM microscopy and spectroscopy.\nThe station w
as projected for fundamental researches in solid state physics\, surface s
cience and for processing technological operations in the course of creati
on devices for micro- and nanoelectronics.\nThe station is located at the
bending magnet beamline 6.5 and covers the region of excitation energies
between 25 eV and 1500 eV due to a plane grating monochromator. The electr
on energy analyzer used\, is a hemispherical analyser PHOIBOS 225 with an
energy resolution of 1 meV and an angular resolution of 0.1 °. The statio
n is provided with a complete set of accessories for in-situ sample prepar
ation\, sputtering and deposition of monolayer and submonolayer thin films
\, as well as AFM and STM microscope for in-situ topography and electronic
structure studies of samples.\nThe report shows the optical design\, the
specifications\, the first spectra and discussed prospects of development
of the station.\n\nhttps://indico.inp.nsk.su/event/3/contributions/1292/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1292/
END:VEVENT
BEGIN:VEVENT
SUMMARY:In situ determination of the active phase in palladium nanocatalys
t by X-ray absorption spectroscopy and X-ray diffraction
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1294@indico.inp.nsk.su
DESCRIPTION:Speakers: Aram Bugaev (Southern Federal University)\nHydrogena
tion of alkynes and alkenes over palladium catalyst is associated with for
mation of palladium hydrides and carbides phases\, which affects the selec
tivity and catalytic performance of the catalyst. The aim of this study is
to investigate the effect of the structural changes on the catalytic prop
erties of the material. We investigated the structural evolution of the in
dustrial palladium-based nanocatalyst in operando conditions during the ca
talytic hydrogenation of ethylene. The structure of the catalyst was follo
wed by X-ray absorption spectroscopy and X-ray powder diffraction\, while
the conversion level of ethylene to ethane was controlled by mass spectrom
eter. We observed that phase transitions occurring in palladium nanopartic
les lead to dramatic changes of the catalytic activity. In addition to sta
ndard Fourier-analysis of X-ray absorption data and Rietveld refinement of
diffraction patterns\, analysis of X-ray absorption near-edge structure (
XANES) allowed to discriminate between PdH and PdC species having similar
fcc structure. The PdC phase and pure Pd phase demonstrated extremely high
catalytic activity in ethylene to ethane hydrogenation\, while β-PdH sho
wed unexpectedly low activity.\n\nhttps://indico.inp.nsk.su/event/3/contri
butions/1294/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1294/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Power supply system for corrector magnets of the European X-Ray Fr
ee-Electron Laser
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1295@indico.inp.nsk.su
DESCRIPTION:Speakers: Oleg Belikov (Budker INP SB RAS)\nTotal length of th
e European X-Ray Free-Electron Laser (European XFEL) tunnel is 3\,4 km. Th
ere are used about 300 magnet correctors to justify position of electron b
eam. Each magnet is feed by separate power supply with high parameters. To
have a stable beam the short time (up to 1 sec) deviation of output curre
nt should be less than 10^-5\, long term stability should be better than10
^-4. For this application the BINP SB RAS developed 7 types of power suppl
ies with output current up to 10 A and output voltage up to 70 V. To provi
de high reliability of power supply system there was developed “hot repl
ace” system allowing remote replacement failed power supply by reserved
one. Now the power supply system is introducing in operation. The paper is
reviewing details of power supply system for European XFEL.\n\nhttps://in
dico.inp.nsk.su/event/3/contributions/1295/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1295/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The research of the superconducting undulator prototype with neutr
al poles and features of the magnetic field distribution in it.
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1297@indico.inp.nsk.su
DESCRIPTION:Speakers: Sergey Khrushchev (BINP)\nThe article describes supe
rconducting undulator prototype with neutral poles designed and fabricated
in Budker Institute of Nuclear Physics. In the upper half of the undulato
r even-numbered poles have a core with a winding and odd - core without wi
nding. In the lower half vice versa. This design allows to provide more ac
curate period and reduces the probability of mechanical movements caused b
y the action of ponderomotive forces leading to quench of superconductivit
y. The article also describes the features of the magnetic field distribut
ion in such windings configuration.\n\nhttps://indico.inp.nsk.su/event/3/c
ontributions/1297/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1297/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Some aspects of crystal centering during X-ray high-throughput pro
tein crystallography experiments.
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1298@indico.inp.nsk.su
DESCRIPTION:Speakers: Yury Gaponov (Department of atmospheric research\, N
ovosibirsk State University\, Novosibirsk\, Russia)\nA set of algorithms a
nd procedures of a crystal loop centering during X-ray high-throughput pro
tein crystallography experiment has been designed and developed.\nA simple
algorithm of the crystal loop detection and preliminary recognition has b
een designed and developed. The crystal loop detection algorithm is based
on finding out the crystal loop ending point (opposite to the crystal loop
pin) using image cross section (digital image column) profile analysis. T
he crystal loop preliminary recognition procedure is based on finding out
the crystal loop sizes and position using image cross section profile anal
ysis. The crystal loop fine recognition procedure based on Hooke-Jeeves pa
ttern search method with an ellipse as a fitting pattern has been designed
and developed. The procedure of restoring missing coordinate of the cryst
al loop is described. Based on developed algorithms and procedures the opt
imal autocentering procedure has been designed and developed. A procedure
of optimal manual crystal centering (Two Clicks Procedure) is described.\n
Developed procedures have been integrated into control software system PCC
S installed at crystallography beamlines Photon Factory BL5A and PF-AR NW1
2\, KEK.\n\nhttps://indico.inp.nsk.su/event/3/contributions/1298/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1298/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Some features of the structure rearrangement in mixed and binary Z
r-Ti sol xerogels.
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1299@indico.inp.nsk.su
DESCRIPTION:Speakers: Yury Gaponov (Department of atmospheric research\, N
ovosibirsk State University\, Novosibirsk\, Russia)\nProcess of gelation a
nd thermal decomposition at different temperatures of the Zr/Ti sol-xeroge
ls\, chemically identical but prepared by different methods (mixed and bin
ary)\, was studied by SAXS/WAXD with the use of SR.\nPrimary particles in
mixed and binary Zr/Ti sol-xerogels have different structure. Using the qu
alitative contrast variation method it was concluded\, that primary partic
le in mixed system consists of Ti nuclear surrounded by Zr atoms in the ou
ter layer of the particle. In contrast\, primary particle in binary system
consists of Zr nuclear surrounded by Ti atoms in the outer layer of the p
article.\nMultistage thermal decomposition of the Zr/Ti xerogels proceeds
through an intermediate phase formation. In the case of the mixed Zr/Ti xe
rogel the intermediate phase has a distorted (amorphous) structure of anat
ase (TiO2) which is formed\, probably\, inside the primary particle of the
xerogel. In this case\, during the thermal decomposition the interatomic
distance in the intermediate phase is similar to the interplane distance o
f metal planes in final product (crystalline ZrTiO4 powder). In the case o
f a binary Zr/Ti xerogel\, the intermediate phase has an amorphous structu
re consisting\, probably\, of the disordered metal atoms (probably\, in an
oxide state) surrounded by water molecules.\n\nhttps://indico.inp.nsk.su/
event/3/contributions/1299/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1299/
END:VEVENT
BEGIN:VEVENT
SUMMARY:EXPERIENCE OF USE OF X-RAY ENERGY-DISPERSIVE AND MONOCHROMATIC DIF
FRACTOMETRY FOR STRUCTURAL RESEARCHES OF BIOLOGICAL SYSTEMS USING SYNCHROT
RON RADIATION
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1300@indico.inp.nsk.su
DESCRIPTION:Speakers: Vladivir Korneev (Institute of Cell Biophysics\, RAS
\, Institutskaya ul. 3\, 142290\, Pushchino\, Russia)\nThe important role
in the study of the structural mechanism of the functional activity of bio
logical systems belongs to the instrumental and methodical developments in
tended for the energy-dispersive (Θ=const) and monochromatic (λ=const) d
iffractometry with synchrotron radiation (SR) usage.\nResults of our long-
term developments are considered. At one method the collimated X-ray beam
of polychromatic radiation ("white spectrum") is directed on the object\,
and the diffraction pattern represent the intensity distribution as functi
on of a wavelength at the fixed scattering angle (Θ)\, i.e. lattice-plane
spacing of object are uniquely determined by a discrete set of the photon
energy. Note the spatial resolution of different zones of the X-ray patte
rn can be changed by varying Θ value that allowed to record weak reflecti
ons and to register X-ray pattern with high resolution for material with l
arge spacings of identity. The ‘λ=const’ method determines by dedicat
ed monochromatic wavelength from continuous SR spectrum\, and then the X-r
ay beam is collimated by X-ray optical zoom lenses\; obtained diffraction
patterns demonstrate the intensity distribution as a function of scatterin
g angle. The ‘Θ=const’ method provides increasing intensity of the X-
ray beam on 2-3 orders\, however earlier during creation of the first SR s
ources these advantages were unattainable because of under quick-action of
the detection system. The ‘λ=const’ method is traditionally used wit
h position sensitive coordinate detectors. Now power-dispersion detectors
with high performance of registration and energy resolution are developed\
, therefore it is very inviting to use polychromatic radiation.\nVarious X
-ray diffraction stations created by us (KEMUS\, FRAKS\, DICSI) on the ope
rating channels of the storage rings VEPP-3\, VEPP-4 (Siberian Center of S
ynchrotron and Terahertz Radiations\, SCSTR\, Novosibirsk) and Siberia-2 (
Kurchatov Center of Converging of Nano-\, Bio-\, Information-\, and Cognit
ive Sciences and Technologies\, NBIC\, Moscow) are presented. This equipme
nt based on block - modular configuration\, i.e. the main devices of stati
ons could be used as independent modules for any experimental scheme. Desp
ite different character of current tasks\, a many things in the experiment
al technique were unified\, for example\, such blocks as monochromatic and
reflecting zoom lenses\, collimators of the primary beam\, and also the v
acuuming device\, remote control of the optical system components and soft
ware.\nResults of the SAXS/WAXS diffraction investigations of biological t
issues at different physiological states are considered. There are present
ed also the first experimental results of X-ray diffraction study of test
objects (collagen and muscle) received by the Θ=const method with using S
R of the VEPP-3 storage ring.\nThe work is supported by the RFBR grant # 1
4-44-03667.\n\nhttps://indico.inp.nsk.su/event/3/contributions/1300/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1300/
END:VEVENT
BEGIN:VEVENT
SUMMARY:GLOBAL RESEARCH INFRASTRUCTURES (GRI) ON NEW ESFRI ROADMAP – EUR
OPEAN PERSPECTIVE
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1301@indico.inp.nsk.su
DESCRIPTION:Speakers: MARINE MELKONYAN (COORDINATOR OF THE NATIONAL CONTAC
T POINT FOR RESEARCH INFRASTRUCTURES\, NATIONAL UNIVERSITY OF SCIENCE AND
TECHNOLOGY "MISIS")\nM.K. Melkonyan\, E.A. Levashov\, Yu.O. Krasilnikova\n
\nNational University of Science and Technology “MISIS”\, Leninsky pro
spect\, 4\, Moscow\, 119049\, Russia\, e-mail: fp7-infra@misis.ru\n\n Th
e term “research infrastructures” (RI) refers to facilities\, resource
s and related services used by the scientific community to conduct top-lev
el activities in all fields of science. This definition covers major scien
tific equipment or sets of instruments\; knowledge-based resources such as
collections\, archives or data banks\; e-Infrastructures (networks\, comp
uting resources\, software). \n Some research facilities\, particularly
in physics or astronomy (called global research infrastructures - GRI) are
so large\, complex or expensive that they require international cooperati
on for construction and operation and it is being impossible for one count
ry or region alone to build and operate these facilities. The examples of
GRIs are CERN: the European Organization for Nuclear Research\; JINR: the
Joint Institute for Nuclear Research\; ESRF: European Synchrotron Radiatio
n Facility\; SKA: Square Kilometer Array\, the next generation radio teles
cope. \n The efficient planning\, design\, construction and operation of
the global research infrastructures requires not only a sharing of costs\
, but also the sharing of knowledge. A Group of Senior Officials (GSO) on
GRIs established in 2008 strives to reach a common understanding on matter
s such as governance\, funding and management of global research infrastru
ctures. Russia is the member of the GSO group. \n According to the last
GSO Progress report 2015\, the current list of the national based research
infrastructures of global interest covers 39 RIs from 14 countries\; amon
g them there are six Russian Mega science projects. \n A key area of R
ussia-EU S&T cooperation involves the joint development of GRIs. Russia is
a partner of a number of research infrastructure initiatives located in E
urope: the EU X-ray Free-Electron Laser (XFEL)\; the Facility for Antiprot
on and Ion Research (FAIR)\; the International Thermonuclear Experimental
Reactor (ITER)\; the Large Hadron Collider (LHC\, CERN)\; the European Syn
chrotron Radiation Facility (ESRF). All these projects have a global dimen
sion and participants and are located on the roadmap of ESFRI\, the Europe
an Strategy Forum on Research Infrastructures.\n Since its foundation in
2002\, ESFRI has played a leading role in coordination of research infras
tructures across Europe and development of integrated and coherent approac
h for policy making in this field. \n The new ESFRI roadmap 2016 consist
s of 21 ESFRI Projects with a high degree of maturity and 29 ESFRI Landmar
ks - RIs that reached the implementation phase by the end of 2015. The Lan
dmarks in the area of physical sciences and engineering cover 11 internati
onally well-known facilities: E-ELT –European Extremely Large Telescope\
; ELI- European Light infrastructure\, EMFL- European magnetic field labor
atory\; ESRF UPGRADES\; European spallation source\; European XFEL\, FAIR\
, HL-HLC\; ILL20/20\, SKA\; SPIRAL 2. The impact of many of the ESFRI rese
arch infrastructures is global and this has prompted a reflection in two m
ain fora: the Global Science Forum of OECD and the GSO group tasked with d
efining a strategy for GRIs. \n Developing excellent RIs for physical sc
iences and engineering is one of the top European priorities. Bringing tog
ether scientists and users of the Europe’s major projects with their cou
nterparts all over the world has an intention to generate new synergies th
at will stimulate a truly global integration of existing infrastructures.
The key of this integration process will be the efficient access to and th
e open sharing of data and information produced by the RIs.
\n This work was supported under th
e grant No. 14.572.21.0004 of the Federal Targeted Program for Research an
d Development in Priority Areas of Development of the Russian Scientific a
nd Technological Complex for 2014-2020.\n\nhttps://indico.inp.nsk.su/event
/3/contributions/1301/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1301/
END:VEVENT
BEGIN:VEVENT
SUMMARY:In situ X-ray diffraction studies of Ce0.9Y0.1O2-δ\, Ce0.65Pr0.25
Y0.1O2-δ and Pr6O11
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1302@indico.inp.nsk.su
DESCRIPTION:Speakers: Zakhar Vinokurov (BIC SB RAS)\nCe0.9Y0.1O2‑δ(YDC)
\, Ce0.65Pr0.25Y0.1O2‑δ(YPDC) and Pr6O11 were synthesized by Pechini te
chnique and sintered at 1100°C. The samples were characterised by X-ray d
iffraction (XRD) and TEM methods.\n\nIt has been found that oxides behave
differently after change of the ambient oxygen partial pressure (pO2). In
situ XRD experiments showed that YPDC cell reversibly expands after change
to the lower pO2 at 500-600C due to the oxygen loss while YDC didn't show
any significant structure changes. For the Pr6O11 the following structure
changes were observed at the same conditions: monoclinic → cubic → tr
igonal.\n\nWe also estimated the oxygen mobility coefficients(kchem - oxyg
en surface exchange coefficient and Dchem - oxygen chemical diffusion coef
ficient) of all samples by analysis of the cell volume relaxation (CVR) cu
rves obtained from the XRD data after abrupt change of the oxygen partial
pressure from 100 mBar to 10 mBar. Since no relaxation was observed for YD
C\, kchem and Dchem could not be calculated. For YPDC process is limited b
y surface exchange thereby only kchem could be calculated. The following k
chem values were determined for YPDC 1.3*10^(-4) cm/s at 500 °C and 1.6*1
0^(-4) cm/s at 600 °C. For Pr6O11 both kchem and Dchem could be calculate
d simultaneously and were about 5.0·10^(-4) cm/s and 5.0·10^(-7) cm^2/s
at 500 °C.\n\nIn situ XRD experiments were carried out with involvement o
f equipment belonging to the shared research center “SSTRC”.\n\nhttps:
//indico.inp.nsk.su/event/3/contributions/1302/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1302/
END:VEVENT
BEGIN:VEVENT
SUMMARY:MECHANISMS OF COMBUSTION AND STRUCTURE FORMATION IN SHS- SYSTEMS W
ITH PARTICIPATION OF TWO AND MORE CHEMICAL REACTIONS
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1303@indico.inp.nsk.su
DESCRIPTION:Speakers: Evgeny Levashov (National University of Science and
Technology "MISiS")\nThe mechanisms of combustion and structure formation
in perspective systems Ta-Ti-C\, Mo-Si-B\, Ta-Zr-C\, Zr-Si-B\, Ti-C-Ca3(PO
4)2\, Cr-Al-Si-B\, Si-C-B were well characterized using a combination of v
arious techniques including dynamic XRD\, stop combustion front\, SEM\, TE
M\, Raman spectroscopy\, etc. \nIt was established that gas transport reac
tions is to control the combustion in some cases. In system (100%–X)(Ti+
0\,5C) + X(Ta+C) with X= 10 and 30% an abrupt increase of Uc and Tc occur
s as a result of the transfer from the splitting to merging mode\, which i
s accompanied by an increase in heat release as a result of two parallel c
hemical reactions. In the case of X= 50%\, dependences Tc(T0) and Uc(T0) a
re linear over an a wide range of T0. \nThe following processes are defin
ed the SHS for Si-rich Mo-Si-B compositions: silicon melting\, its spreadi
ng over the surfaces of the solid Mo and B particles\, followed by B disso
lution in the melt\, and formation of intermediate Mo3Si-phase film. The s
ubsequent diffusion of silicon into molybdenum results in the formation of
MoSi2 grains and molybdenum boride phase forms due to the diffusion of mo
lybdenum into B-rich melt. The formation of MoB phase for B-rich compositi
ons may occur via gas-phase mass transfer of MoO3 gaseous species to boron
particles. The stages of chemical interaction in the combustion wave are
also investigated. The obtained results indicate the possibility of both p
arallel and consecutive reactions to form molybdenum silicide and molybden
um boride phases. Thus the progression of combustion process may occur thr
ough the merging reaction fronts regime and splitting reaction fronts regi
me. Molybdenum silicide formation leads the combustion wave propagation du
ring the splitting regime\, while the molybdenum boride phase appears late
r.\nKinetics of the SHS process\, stages of chemical transformations and s
tructure formation of ceramic materials in the Cr-Al-Si-B system were inve
stigated. The effect of green mixture composition and initial temperature
on the combustion rate Uc and combustion temperature Tc\, which reduce wit
h increasing Al content\, was studied. An increase in the initial temperat
ure of the SHS process causes a linear increase of Uc and Tc in the range
of T0 = 290–750 K. This is a fact that each composition is characterize
d by the similar combustion mechanism\, when the stages of chemical reacti
ons of product formation remain unchanged. However\, an increase in T0 abo
ve 750 K\, probably\, may lead to exponential character of Uc growth. Furt
hermore\, an increase in Al content increases the proportion of the Al–S
i eutectic melt. The stages of chemical transformations and the mechanism
of structure formation in the combustion wave were studied. \nDependences
Tc(T0) and Uc(T0) of mechanically activated (MA) Ta-Zr-C exothermic mixtur
es were determined. The self-heating phenomenon is observed in argon atmos
phere at T0 > 380 K due to zirconium particles oxidation by adsorbed oxyge
n. ZrO2 was formed in the combustion zone at the initial stage of chemical
interaction\; it is subsequently transformed into ZrC. TaC was formed in
the combustion zone\, while the single-phase (Ta\, Zr)C with the lattice p
arameter of 0.4479 nm was formed closer to the post-combustion zone.\nKine
tics and mechanism of SHS process\, stages of chemical transformation and
structure formation in systems Zr-Si-B\, Ti-C-Ca3(PO4)2\, Si-C-B were also
discussed.\n\nhttps://indico.inp.nsk.su/event/3/contributions/1303/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1303/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The new control for magnet system of KCSR.
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1308@indico.inp.nsk.su
DESCRIPTION:Speakers: Evgeniy Kaportsev (NRC Kurchatovskiy institut)\nThe
running cycle of Kurchatov Synchrotron Radiation Source (KSRS) includes th
e injection of electrons with energy 80 MeV from the linear accelerator in
the booster storage ring Siberia-1\, the accumulation of a electron curre
nt up to 400 mA and\, then\, electron energy ramping up to 450 MeV with th
e subsequent extraction of electrons in the main ring\, storage ring Siber
ia-2\, and accumulation there up to 300 mA\, and at last the energy rampin
g up to 2.5 GeV.\nSeveral years ago\, a modernization of the current syste
m of automated control systems (ACS) has started. This article presents on
e of the most important parts - the new control subsystem of the magnet sy
stem.\n\nhttps://indico.inp.nsk.su/event/3/contributions/1308/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1308/
END:VEVENT
BEGIN:VEVENT
SUMMARY:SR micro-XRF installation on VEPP-3 storage ring. An approach and
difficulties in increasing the spatial resolution.
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1309@indico.inp.nsk.su
DESCRIPTION:Speakers: Dmitry Sorokoletov (Budker Institute of Nuclear Phys
ics SB RAS)\nX-ray fluorescence microanalysis on synchrotron radiation bea
ms (SR micro-XRF) is a method to explore the elemental composition of samp
les and objects of various nature with a typical spatial resolution of 15
to 25 μm. Such resolution\, available in qualitative micro-XRF (mapping o
f fluorescent signal distribution or exploration of area of interest witho
ut detailed consideration of effects caused by absorption by a sample) is
defined by the transverse size of the focal spot of x-ray optics used. As
a rule\, up-to-date (monolithic) polycapillary lenses are applied. This q
ualitative elemental mapping in some cases can provide useful information.
It can be in demand\, for example\, in reconstruction of paleoclimate (la
yered samples of bottom sediments\, so called varves) and conditions of ro
ck formation in deposit occurrences\, as well as in examination of biolog
ical objects (hair and large cells)\, particles of earth and meteorite dus
t and some other objects [1-2].\n\nThe SR XRF experimental station on the
VEPP-3 storage ring (the SCSTR) [3] is equipped with the installation "SR
micro-XRF"\, which is intensely used by a number of users in most of these
areas of research. The installation was engaged in an extensive series of
experiments [3] using qualitative SR micro-XRF\; unique results were obta
ined in several cases. Two directions of improving the method and installa
tion were selected so far. The first one is development of certified techn
iques of (semi-) quantitative XRF\, and the second one is 1.5-2 time impro
vement of the spatial resolution due to application of complicated algorit
hms to process experimental data (so called regularization)\, including em
bedded indirect accuracy control.\n\nRegularization is a method of approxi
mate solution to unstable inverse problems. It is based on certain control
led introduction of systematic error into the result. This error is introd
uced so that its contribution optimally balances [4\, p. 52-55] the influe
nce of random noise\, because of which the problem cannot be accurately so
lved by traditional methods. Development of any regularization algorithms
implies analysis of feasibility of the above rule (in other words\, the co
nvergence of the approximate solution) over the entire range of all input
parameters. The algorithm user is assumed to know the rules for use of one
or another regularizing procedure (that may expect\, for example\, normal
distribution of noise\, absence of systematic errors\, special prior cons
traints to the solution\, and others) and adhere to them. Unfortunately\,
this is not always the case\, and application of regularization of algorit
hms is often blind and inefficient\, especially when third-party programs
are used.\n\nThis work presents an attempt of non-strict but effective pra
ctical analysis of the influence of various factors "hindering" the regula
rization (inaccuracy in the determination of the instrumental function\, d
iscretization errors\, Gibbs boundary effects etc.) on the process of solv
ing inverse deconvolution problems arising in SR micro-XRF using the Tikho
nov algorithm [4\, p. 52]. The analysis performed resulted in practical re
commendations on the optimal regimes of experiment with improved spatial r
esolution and highlighted the role of numerical simulation in the control
of solving real inverse deconvolution problems.\n\nThis work was supported
by the RFBR Grants № 14-02-00631\, 16-32-00705. The work by D.S. Soroko
letov was supported by a scholarship of the President of the Russian Feder
ation (SP-2761.2016.2).\n\nReferences\n\n[1] S. Majumdara\, J. R. Peralta
-Videaa\, H. Castillo-Michel et al. Analytica Chimica Acta. 2012. № 755.
1–16.\n\n[2] B. Menez\, H. Bureau et al. Modern Research and Educationa
l Topics in Microscopy. 2008. Vol. 2. 976-988.\n\n[3] http://ssrc.inp.nsk.
su/CKP/stations/passport/3/\n\n[4] S.I. Kabanikhin. Inverse and incorrect
problems (in Russian). Novosibirsk\, Siberian scientific publishing house.
2009. 457 p.\n\nhttps://indico.inp.nsk.su/event/3/contributions/1309/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1309/
END:VEVENT
BEGIN:VEVENT
SUMMARY:SR XRF in identification of trace elements in trace amounts of hum
ic acids
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1312@indico.inp.nsk.su
DESCRIPTION:Speakers: Maria Dergacheva (Institute for Soil Science and Agr
icultural Chemistry of SB RAS)\nHumic acids (humic and fulvic acids) are n
atural substances that perform a number of functions in the biosphere to m
aintain its stability. This is due to the ability of humic acids to accumu
late\, deposit\, and store carbon and a wide range of trace elements for l
ong\, geologically-comparable periods\, as well as inhibiting chemical com
pounds toxic to living organisms. The content of humic acids in soils and
natural and man-made deposits is ambiguous. The amount of humic acids can
often be deciles (or even less) of percent. This means handling of very la
rge masses\, up to a kilogram or more\, of soil samples to study. This\, i
n turn\, limits the possibility of quantitative research to identify the e
cological state of the environment. Since the extracted preparations of hu
mic acids have a weight of milligrams\, there arises a problem of non-dest
ructive methods for their investigation and creation of base of preparatio
ns of humic acids for their further study.\nTesting of different methods o
f analysis (NAA\, two-jet arc plasma AES etc.) for determination of the tr
ace element content in humic acids resulted in a conclusion that X-ray flu
orescence analysis using synchrotron radiation (SR XRF)\, which a non-dest
ructive and multi-element method\, fits the best to a wide range of proble
ms concerning the condition of the natural environment. It is particularly
important to identify elements such as As\, Se\, Br\, Rb\, Sr\, Y\, Zr\,
Mo\, I\, Pb\, Th\, and U\, determination of which in humic acids by other
methods may be difficult or unreliable. Thus\, the use of SR XRF in identi
fying a wide range of trace elements in humic acids enables\, first\, usin
g weights of a few milligrams\, secondly\, extension of the possible range
of elements to identify\, and\, finally\, storage of preparations of this
natural component\, which is very significant in the functioning of the b
iosphere\, for further research.\n\nhttps://indico.inp.nsk.su/event/3/cont
ributions/1312/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1312/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Mercury in ancient organic materials (Noin-Ula\, Mongolia): EDXRF\
, SRXRF and micro-SRXRF analysis
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1313@indico.inp.nsk.su
DESCRIPTION:Speakers: Valentina Zvereva (Nikolaev Institute of Inorganic C
hemistry SB RAS)\nRecently the anomalously high content of copper in ancie
nt hairs in royal burials of Xiongnu (I B.C. – I A.D.\, Northern Mongoli
a) was discovered. Detailed investigation of all types of organic findings
from the burials was performed by X-ray fluorescent technique with synchr
otron radiation (SRXRF)\, X-ray microtomography\, X-ray absorption spectro
scopy (XANES and EXAFS) and electron microscopy. The results revealed the
exogenous source of copper in ancient hairs and allow to exclude copper po
isoning in lifetime [1]. There were 40 hair plaits in ancient burial site.
Mercury was detected in all hair samples (up to 1200 ppm). High content o
f Hg may be caused by the burial environment as well as the accumulation i
n lifetime. Information\, which can elucidate the probable cause of such a
high Hg content in hairs\, can be helpful in reconstruction of culture\,
life and technologies of ancient people. \nThe unique archaeological mater
ial demands nondestructive analytical methods\, as SRXRF analysis and X-ra
y microanalysis (µSRXRF). \nSRXRF methodology for Hg det
ermination in archaeological hair samples\, mercury concentration in metal
lic objects from the burial\, and information on cross-section distributio
n of Hg in hair strand (µSRXRF) allow to determine probable source of mer
cury in ancient hairs. \n\n[1]. V. Trunova\, V. Zvereva\, N. Polos
mak\, D. Kochubey\, V. Kriventsov and K. Kuper. Investigation of Organic M
aterials From the ‘Royal’ Burials of Xiongnu (Noin-Ula\, Mongolia) by
Srxrf and XAFS Methods. // Archaeometry. – 2015. – V. 57. – N. 6.
– P. 1060-1077. DOI: 10.1111/arcm.12109.\n\nhttps://indico.inp.nsk.su/ev
ent/3/contributions/1313/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1313/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Multifunctional X-ray lithography station at VEPP-3
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1319@indico.inp.nsk.su
DESCRIPTION:Speakers: Boris Goldenberg (Budker INP SB RAS)\nThe multifunct
ional station “LIGA” at synchrotron radiation source VEPP-3 is part of
shared-usage "Siberian Center for Synchrotron and Terahertz Radiation" in
frastructure. The apparatus used for X-ray lithography are usable for samp
les with size in range from 1 to 10 cm and resist layers thickness in rang
e 1 $\\mu$m to 7 mm. The development of processing methods and equipment o
f station is kept on. Present article deal with the capabilities of statio
n “LIGA” and samples of produced microstructures.\n\nhttps://indico.in
p.nsk.su/event/3/contributions/1319/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1319/
END:VEVENT
BEGIN:VEVENT
SUMMARY:A study of deposition of nanoscale intermediary Au-S species on ox
ide supports from aqueous solution using XAFS and TEM
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1320@indico.inp.nsk.su
DESCRIPTION:Speakers: Anton Karacharov (ICCT SB RAS)\nNanoscale products d
eposited on oxide supports at room temperature from 0.1 mM tetrachloroaura
te aqueous solutions and colloidal solutions (sols) of Au0 and gold sulfid
e nanoparticles\, which were prepared beforehand by the reduction of the A
u(III) complexes with sodium sulfide\, were studied using total electron y
ield X-ray absorption near edge structure spectroscopy (TEY XANES)\, exten
ded X-ray absorption fine structure spectroscopy (EXAFS)\, X-ray photoelec
tron spectroscopy (XPS) and transmission electron microscopy (TEM).\nIt wa
s found\, that intermediary species of the sulfide reduction (Na2S/HAuCl4
= 3) was deposited on metal oxides as disordered Au2S\, the surface of whi
ch tends to decompose yielding Au0NP’s with sulfur adlayer. This conclus
ion is supported by EXAFS\, which shows that in case of gold deposited ont
o α-Fe2O3 in similar conditions\, the average distance Au-S of the first
coordination sphere was 2\,32 Å\, and a coordination number was equal to
1.1\, i.e. gold was presented in a form disordered Au2S. According to TEY
XANES and XPS data\, the significant reduction or sulphidization of metal
oxides surfaces are not occur\, excepting CuO\, onto which surface a Cu(I)
sulfide was formed.\nFor freshly prepared solution with the Na2S/HAuCl4 r
atio of 3\, a linear correlation between the quantity of gold deposited an
d isoelectric point of the oxide surface was found implying that intermedi
ates bear a negative charge. The quantity of gold deposited from the inter
mediates solution of the citrate reduction of chloroaurate is lower\, than
from the final citrate sols and sulfidic sols\, and high relative concent
rations of oxidized forms of gold remain on substrates.\nSeveral metal oxi
des were decorated using the intermediates prepared with Na2S/HAuCl4 = 3.
The TEM images show mainly Au0 NP’s in the range 3-5 nm\, excepting CuO
where ≈10 nm NP’s were observed.\n\nhttps://indico.inp.nsk.su/event/3/
contributions/1320/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1320/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Dynamics of nanoparticles sizes during trinitrotoluene detonation
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1321@indico.inp.nsk.su
DESCRIPTION:Speakers: Ivan Rubtsov (Lavrentyev Institute of Hydrodynamics
of the Siberian Branch of the Russian Academy of Sciences)\nIn this work w
e carried out our experiments on measuring small angle x-ray scattering (S
AXS) during trinitrotoluene detonation. Registration of SAXS signal at det
onation of high explosives (HE) allows to measure fluctuation of density\,
which are connected with process of carbon condensation. Here we present
dynamics of particles sizes during detonation of cast trinitrotoluene char
ge in diameter of 40 mm.\n\nWe also carried out SAXS calculation with real
spectrum (which consist of the viggler radiation\, TNT absorption and the
DIMEX-3 detector absorption). Our calculation shown that average sizes of
nanodiamonds behind the detonation front could be restored from measured
data on pink SR beam SAXS distribution.\n\nOur experiments with using sync
hrotron radiation were made on SYRAFEEMA (Synchrotron Radiation Facility f
or Exploring Energetic Materials) station at the accelerating complex VEPP
-4M (Budker Institute of Nuclear Physics). This new station allowed to inc
rease the mass of the studied charges up to 200 grams in comparison with s
imilar station “Extreme states of matter” at the accelerating complex
VEPP-3.\n\nhttps://indico.inp.nsk.su/event/3/contributions/1321/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1321/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Study of Electronic Structure and Magnetic Properties of Manganese
Sulfide Solid Solutions Doped With Rare Earth Elements
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20240319T125431Z
UID:indico-contribution-137-1322@indico.inp.nsk.su
DESCRIPTION:Speakers: Evgeniy Korotaev (Nikolaev Institute of Inorganic Ch
emistry of the Siberian Branch of the Russian Academy of Sciences)\nSolid
solution containing chemical rare-earth elements (such as Yb or Tm) have
a number of unique properties\, which is commonly undergo a phase transiti
ons having a purely electron nature and related with the change in filling
of 4f electron levels [1\, 2] along with magnetic–nonmagnetic state tra
nsitions [3]. These systems are also possess thermoelectric properties. In
vention of a highly efficient thermoelectric materials is one of the impor
tant direction of modern materials science. One of the directions on findi
ng of new thermoelectric materials is the study of systems\, in which met
al-dielectric transition is observed. The systems of such kind could be so
lid solutions based on the transition metal sulfides Mn1-xMxS (M=Cu\, Fe\,
Co) and possess high values specific of thermoelectric power [4-5].\n
Electrophysical properties of such functional matrials is primarily deter
mined by features of its electronic structure. In this regard\, current wo
rk involves a comprehensive study of the iterlelationship between electron
ic structure and magnetic properties (i.e. magnetic suspetibility) of the
Mn1-xLnxS (Ln=Dy\, Tm\, Yb\; x=0\;0.01\;0.05). X-ray emission spectra (XES
) provides information about the electronic structure of valance band. Х-
ray absorption near edge spectroscopy (XANES) provides information about c
onduction band electronic structure (K-absorbtion spectra of Mn\, S\; L-sp
ectra of lanthanides). Measurement of the chemical shifts of (Mn\, S)Kα1\
,2-lines and ratio of MnLα1\,2-\,Lβ- emission spectra allows to determin
e the charge and the electron density of metal and sulfur atoms in investi
gated solid solutions. In order to investigate electronic structure XAS an
d XES spectra figured in unified energy scale. Experemental spectra were c
ompared with quantum chemical calculations in the FDMNES and ADF BAND soft
ware packages.\n\n[1] S. S. Aplesnin\, O. B. Romanova\, A. M. Kharkov\, A.
I. Galyas\, 2015\, Phys. Solid State 57 (5)\, 886.\n[2] S. S. Aplesnin\,
A. M. Harkov\, E. V. Eremin\, O. B. Romanova\, D. A. Balalev\, V. V. Sokol
ov\, and A. Yu. Pichugin\,IEEE Trans. Magn. 47\, 4413 (2011).\n[3] D. I. K
homskii\, Sov. Phys.—Usp. 22 (10)\, 879 (1979).\n[4] S.S. Aplesnin\, O.B
. Romanova\, A.I. Galyas\, V.V. Sokolov\, 2016\, Phys. of Sol. State\, 201
6\, Vol. 58\, No. 1\, pp. 21–26. \n[5] Abramova G.M. Vorotynov A.M.\, Pe
trakovskii G.A. et al. // Phys. of Sol. State\, 2004\, vol.46\, n. 12\, p.
2225. \n[6] G. I. Makovetski \, A. I. Galyas\, O. F. Demidenko et al. // P
hys. of Sol. State\, 2008\, vol.50\, n. 10\, p.1826.\n\nhttps://indico.inp
.nsk.su/event/3/contributions/1322/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1322/
END:VEVENT
END:VCALENDAR