BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Continuously operated high performance vacuum-pumping systems for Gas-Dynamic Trap DTSTART;VALUE=DATE-TIME:20191119T031000Z DTEND;VALUE=DATE-TIME:20191119T033000Z DTSTAMP;VALUE=DATE-TIME:20260608T054654Z UID:indico-contribution-19-714@indico.inp.nsk.su DESCRIPTION:Speakers: Alexander Krasnov (BINP)\nEstimation shows that powe rful Gas-Dynamic Trap operated for generating neutrons at continuous rate 1E18 1/s will release high particle flux (∼3E22 1/s of D/T mixture) out of confinement region. The vacuum vessel of the Gas-Dynamic Trap consists of central cylindrical confinement volume and two plasma expansion vessels . In order to sustain the adequate vacuum conditions in the expansion vess els (\n\nhttps://indico.inp.nsk.su/event/19/contributions/714/ LOCATION:Budker INP Conference Hall URL:https://indico.inp.nsk.su/event/19/contributions/714/ END:VEVENT BEGIN:VEVENT SUMMARY:Neutron Shielding Analysis and Activation Calculation of GDT-based Fusion Neutron Source DTSTART;VALUE=DATE-TIME:20191118T044000Z DTEND;VALUE=DATE-TIME:20191118T051000Z DTSTAMP;VALUE=DATE-TIME:20260608T054654Z UID:indico-contribution-19-715@indico.inp.nsk.su DESCRIPTION:Speakers: Qiusun Zeng (Institute of Nuclear Energy Safety Tech nology\, CAS)\nThe report presents results of neutron shielding calculatio n for ALIANCE project\, especially for ALIANCE-2. We used the Monte Carlo transport program SuperMC with data library FENDL 2.1. The calculation res ults show that the 5cm thickness of the shielding layer of ALIANCE-2 is en ough. The highest nuclear thermal deposition is at Coil-3 (C3) with a valu e 0.92W/m3. It is much lower than ITER's nuclear thermal deposition limit for superconducting conductors\, which is 1KW/m3. Special attention has be en paid to the shielding of the mirror coils. Materials activation calcula tion is ongoing.\n\nhttps://indico.inp.nsk.su/event/19/contributions/715/ LOCATION:Budker INP Conference Hall URL:https://indico.inp.nsk.su/event/19/contributions/715/ END:VEVENT BEGIN:VEVENT SUMMARY:Assessment of Gas-dynamic Trap Magnetic Fusion for Space Propulsio n DTSTART;VALUE=DATE-TIME:20191118T092500Z DTEND;VALUE=DATE-TIME:20191118T094500Z DTSTAMP;VALUE=DATE-TIME:20260608T054654Z UID:indico-contribution-19-716@indico.inp.nsk.su DESCRIPTION:Speakers: Jun Song (Institute of Nuclear Energy Safety Technol ogy\, CAS)\nThe space propulsion system of high performance is required fo r deep space exploration missions such as Mars and Jupiter exploration. Th e fusion propulsion system has excellent performance of ultra-high specifi c impulse\, high specific power\, and moderate thrust so that it can refle ct their advantages in future manned and unmanned deep space exploration. In this paper\, preliminary analysis has been conducted in order to invest igate the technical requirements of a fusion propulsion system for the Ear th-to-Mars mission. The analytic model based on the Williams assumption wa s adopted and solved using MATLAB. Key parameters such as specific impulse \, specific power mission time\, and payload ratio for Mars rendezvous mis sions were analyzed. The preliminary results through qualitative and quant itative analysis show that in order to arrive the Mars in one month with m ore than 10% of optimal payload ratio\, the specific power in the range of 5-15kW/kg is more reasonable\, and the specific impulse need to reach 100 00 seconds for make full use of inherent advantage of fusion propulsion sy stem\, furthermore\, the fusion propulsion system can operate in optimal c ondition in a wide specific power range (1-100kW/kg) at about 10000-20000 seconds. The future fusion space propulsion system can operate in differen t modes according to the actual mission requirements\, the concept of fusi on space propulsion system based on GDT can exhaust the high-temperature p lasma easily to obtain moderate thrust with high specific impulse\, due to its own linear structure. Meanwhile\, compared with other fusion propulsi on concepts\, it has the advantages of simple and compact configuration\, plasma steady operation\, low technical difficulty\, and construction cost \, it is very suitable for deep space exploration. In this paper\, the res earch development of GDT-based fusion space propulsion system is investiga ted\, we also clear the key technologies required. the overall calculation and analysis can provide a certain reference for the development of the f uture fusion space propulsion system.\n\nhttps://indico.inp.nsk.su/event/1 9/contributions/716/ LOCATION:Budker INP Conference Hall URL:https://indico.inp.nsk.su/event/19/contributions/716/ END:VEVENT BEGIN:VEVENT SUMMARY:ALIANCE: A Route to Fusion Volumetric Neutron Source DTSTART;VALUE=DATE-TIME:20191118T024000Z DTEND;VALUE=DATE-TIME:20191118T033000Z DTSTAMP;VALUE=DATE-TIME:20260608T054654Z UID:indico-contribution-19-717@indico.inp.nsk.su DESCRIPTION:Speakers: Yican Wu (Institute of Nuclear Energy Safety Technol ogy\, Chinese Academy of Sciences)\, Zhibin Chen (Institute of Nuclear Ene rgy Safety Technology\, CAS)\nThis presentation is contributed by the Inst itute of Nuclear Energy Safety Technology (INEST)\, Chinese Academy of Sci ences and the Budker Institute of Nuclear Physics (BINP)\, Russian Academy of Sciences. It will be presented the development strategy and plan of co nstruction of a GDT-based fusion volumetric neutron source project named A xisymmetric LInear Advanced Neutron sourCE (ALIANCE). The goal of ALIANCE project\, jointly undertaken by BINP\, INEST\, and other institutions\, is the accelerated development and realization of continuously operating fus ion volumetric neutron source for specific applications.\n\nhttps://indico .inp.nsk.su/event/19/contributions/717/ LOCATION:Budker INP Conference Hall URL:https://indico.inp.nsk.su/event/19/contributions/717/ END:VEVENT BEGIN:VEVENT SUMMARY:Minimum B mirror trap with guiding center motion on magnetic surfa ce DTSTART;VALUE=DATE-TIME:20191119T020000Z DTEND;VALUE=DATE-TIME:20191119T024500Z DTSTAMP;VALUE=DATE-TIME:20260608T054654Z UID:indico-contribution-19-718@indico.inp.nsk.su DESCRIPTION:Speakers: Olov Ågren (Uppsala University)\nA properly shaped quadrupolar mirror magnetic field\, in combination with a controllable wea k radial electric field\, is predicted to force each guiding center to mov e close to its mean magnetic surface. A neoclassical increase of radial tr ansport would then be practically eliminated. The radial electric field ma y be controlled by biased end plates placed at the end tank outside the co nfinement region where the magnetic field lines intersect. A radial invari ant\, the radial Clebsch coordinate of the gyro center\, can be used to de rive Vlasov equilibria with a finite plasma beta. The minimum B property o f the trap is a strong indicator of MHD stability. For a magnetic field en ded by two expanders\, magnetic field shaping is made aiming at minimum dr ift and ellipticity. The corresponding magnetic field can be reproduced by superconducting coils up to a mirror ratio of 4 or somewhat higher. Mirro r ratios exceeding 10 may be reachable with finite beta effects included. Analytical expressions in closed form are derived. The study addresses pot entials for the concept as a fusion neutron source.\n\nhttps://indico.inp. nsk.su/event/19/contributions/718/ LOCATION:Budker INP Conference Hall URL:https://indico.inp.nsk.su/event/19/contributions/718/ END:VEVENT BEGIN:VEVENT SUMMARY:Divertor for steady-state GDT DTSTART;VALUE=DATE-TIME:20191118T084500Z DTEND;VALUE=DATE-TIME:20191118T090500Z DTSTAMP;VALUE=DATE-TIME:20260608T054654Z UID:indico-contribution-19-719@indico.inp.nsk.su DESCRIPTION:Speakers: Igor Kotelnikov (Budker INP)\nAn analysis is made of possibility of using a device topologically equivalent to a nonparaxial M HD stabilizer as a divertor for the projected ALIANCE source of fusion neu trons on the gas-dynamic trap\, which should operate in a continuous mode. A side effect of adding a divertor to a linear trap is the expected impro vement in plasma MHD stability\, which was previously observed at TARA [Ph ys. Fluids 31 (1988) 2009] and HIEI [Fus. Tech. 39 (2001) 350] facilities. To assess the effect of MHD stabilization by a divertor\, the article ind icates a method for finding stability rings\, and also calculates the degr ee of expansion of the plasma flux in the divertor. The analysis showed th at a good divertor\, which provides a high degree of expansion\, cannot be a good MHD stabilizer\, which provides a large margin of stability. The d ivertor configurations made up of two and three coils are studied\, their advantages and disadvantages are described. The final part of the article presents the calculations of the magnetic field in an end cell with a supe rconducting divertor designed for the GDMT gas-dynamic multi-core trap pro ject [Fus. Sci. Tech. 63 (2013) 46].\n\nhttps://indico.inp.nsk.su/event/19 /contributions/719/ LOCATION:Budker INP Conference Hall URL:https://indico.inp.nsk.su/event/19/contributions/719/ END:VEVENT BEGIN:VEVENT SUMMARY:Features of GDMT design relevant to the development of ALIANCE DTSTART;VALUE=DATE-TIME:20191119T033000Z DTEND;VALUE=DATE-TIME:20191119T035000Z DTSTAMP;VALUE=DATE-TIME:20260608T054654Z UID:indico-contribution-19-720@indico.inp.nsk.su DESCRIPTION:Speakers: Dmitry Yakovlev (BINP)\nGas-dynamic multi-mirror tra p (GDMT) is an ongoing project in development at Budker Institute of Nucle ar Physics\, which aims to demonstrate a leap in performance for linear ax isymmetric magnetic plasma confinement systems and lay the groundwork for a full-scale development of fusion neutron sources (NS) based on gas-dynam ic plasma confinement. As a multipurpose facility\, GDMT is being designed to experimentally evaluate a number of concepts\, which promise a dramati c improvement in plasma confinement in linear systems.\nSuperconducting ma gnet system of GDMT consists of a confinement region with magnetic field s trength up to 3 T which is terminated by either single high-field (up to 1 8 T) magnetic mirrors or advanced multi-mirror modules\, which provide nec essary plasma flux suppression. Owing to its modular design\, the system l ength can change from 6 m for studies of high-β plasma regimes to several tens of meters to accommodate for NS studies with maximized confinement z one length and most advanced multi-mirror modules. The design goal is to b uild a modular superconducting magnet system\, which enables an easy recon figuration of the confinement zone and attachment of mirror sections\, whi le being mechanically robust and cryogenically efficient. \nThe report out lines the scientific program of GDMT and reviews the experimental possibil ities it provides to study a set of problems that are most critical to acc elerated development of practical volumetric fusion neutron sources.\n\nht tps://indico.inp.nsk.su/event/19/contributions/720/ LOCATION:Budker INP Conference Hall URL:https://indico.inp.nsk.su/event/19/contributions/720/ END:VEVENT BEGIN:VEVENT SUMMARY:A draft design of first and second prototype ALIANCE devices DTSTART;VALUE=DATE-TIME:20191118T051000Z DTEND;VALUE=DATE-TIME:20191118T054000Z DTSTAMP;VALUE=DATE-TIME:20260608T054654Z UID:indico-contribution-19-721@indico.inp.nsk.su DESCRIPTION:Speakers: Dmitry Yakovlev (BINP)\nThe report presents the desi gn ideas behind the low- and moderate-power prototypes of continuously ope rating volumetric fusion neutron sources based on gas-dynamic magnetic mir ror devices with neutral beam injection. A possible arrangement of vacuum\ , magnetic\, plasma stabilization and sustainment\, and neutron shielding subsystems is presented\, along with their required parameters that are de fined by the existing calculations of plasma performance in these machines .\n\nhttps://indico.inp.nsk.su/event/19/contributions/721/ LOCATION:Budker INP Conference Hall URL:https://indico.inp.nsk.su/event/19/contributions/721/ END:VEVENT BEGIN:VEVENT SUMMARY:Axial plasma confinement in open magnetic trap - experiments on GD T DTSTART;VALUE=DATE-TIME:20191118T074500Z DTEND;VALUE=DATE-TIME:20191118T080500Z DTSTAMP;VALUE=DATE-TIME:20260608T054654Z UID:indico-contribution-19-722@indico.inp.nsk.su DESCRIPTION:Speakers: Elena Soldatkina (BINP)\nThe presented work is part of the fundamental research on the implementation of a controlled thermonu clear reaction in open-type magnetic traps. The interest in such systems i s defined by the development of powerful neutron sources\, which are neces sary\, in particular\, to control hybrid fusion-fission reactors\, and\, w ith further development\, the creation of purely fusion reactors for energ y production. The main parameter from the applications point of view is th e energy efficiency of the system\, which rapidly increases with increasin g of electron temperature. One of the factors limiting the electron temper ature is the high thermal conductivity of the plasma along the magnetic fi eld lines\, which is determined by a number of complex kinetic processes i n the expanders — regions of the expanding magnetic flux behind the magn etic plugs. The main goal of the work is to study this loss channel in det ail and determine conditions under which these losses could be suppressed to levels acceptable for thermonuclear applications of mirror magnetic tra ps. All the experiments were performed on GDT [1] device in Budker Institu te of Nuclear Physics.\nIn previous work [2] experimental results describi ng the electric potential in the Debye layer near the surface of the plasm a absorber and the average electron energy along the longitudinal coordina te were presented. The present work is devoted to measuring of energy carr ied out from the trap by one ion-electron pair along the length of the exp ander using a set of probes namely pyroelectric bolometer and ion flux pro be. This dependence on the residual gas density in the expander tank has a lso been investigated. These data will make it possible to complete the th eoretical model currently being developed [3]\, which describes the kineti cs of processes in the expander of mirror trap.\n\n1. A. Ivanov and V. Pri khodko\, Plasma Phys. Controlled Fusion 55\, 063001 (2013).\n2. E. Soldatk ina\, et al. Physics of Plasmas 24\, 022505 (2017).\n3. D. Skovorodin\, Ph ysics of Plasmas 26\, 012503 (2019).\n\nhttps://indico.inp.nsk.su/event/19 /contributions/722/ LOCATION:Budker INP Conference Hall URL:https://indico.inp.nsk.su/event/19/contributions/722/ END:VEVENT BEGIN:VEVENT SUMMARY:The optimal scenario for the formation of high beta plasmoid DTSTART;VALUE=DATE-TIME:20191119T084000Z DTEND;VALUE=DATE-TIME:20191119T090000Z DTSTAMP;VALUE=DATE-TIME:20260608T054654Z UID:indico-contribution-19-723@indico.inp.nsk.su DESCRIPTION:Speakers: Dmitriy Skovorodin (BINP)\nThe formation of high bet a plasma by means of neutral beam injection was studied. Energy balance wa s treated to obtain the scaling of threshold power of the beams required t o form high beta equilibrium.\n\nhttps://indico.inp.nsk.su/event/19/contri butions/723/ LOCATION:Budker INP Conference Hall URL:https://indico.inp.nsk.su/event/19/contributions/723/ END:VEVENT BEGIN:VEVENT SUMMARY:Problems to be addressed in the development of steady state NBIs DTSTART;VALUE=DATE-TIME:20191119T024500Z DTEND;VALUE=DATE-TIME:20191119T031000Z DTSTAMP;VALUE=DATE-TIME:20260608T054654Z UID:indico-contribution-19-724@indico.inp.nsk.su DESCRIPTION:Speakers: Vladimir Davydenko (Budker Institue of Nuclear Physi cs)\nTo build-up and sustain a population of high energy ions of hydrogen isotopes in the GDT-based neutron sources\, injection of a steady-state po werful focused neutral beams with energies up to 100 keV is required. Prob lems arising at update of the high power NBIs developed at the Budker Inst itute with a duration of up to 2 s to the stationary operation mode are di scussed in the report.\nAll the injector elements that operate under high heat loads or/and intense fluxes of energetic particles should be protecte d against those and water cooled to provide reasonable time between replac ements and services. Here\, the key problem is development of ion-optical systems with spherically formed electrodes operated in DC mode\, which are most sensitive to these severe conditions. The RF plasma boxes of the io n sources require some redesign and optimization of Faraday screens to rel iably protect the ceramic parts of plasma box exposed to plasma loads. Ot her elements of the injectors such as neutralizer\, cryo-pumps\, bending m agnets\, beam dumps should be also modified for operation in steady-state regime. For these injector elements the required modifications are quite s traightforward. To increase the energy efficiency of the injectors\, appli cation of steady-state energy recuperator of the residual ions\, which are deflected by the bending magnet\, is very promising.\n\nhttps://indico.in p.nsk.su/event/19/contributions/724/ LOCATION:Budker INP Conference Hall URL:https://indico.inp.nsk.su/event/19/contributions/724/ END:VEVENT BEGIN:VEVENT SUMMARY:Axial confinement of electrons in mirror trap with expander divert or DTSTART;VALUE=DATE-TIME:20191118T072500Z DTEND;VALUE=DATE-TIME:20191118T074500Z DTSTAMP;VALUE=DATE-TIME:20260608T054654Z UID:indico-contribution-19-725@indico.inp.nsk.su DESCRIPTION:Speakers: Dmitriy Skovorodin (BINP)\nAxial confinement of elec trons in mirror trap was studied. The formation of electrostatic potential in expander divertors was examined. The numerical simulations was used to verify the theoretical estimations. The influence of secondary emission o f cold electrons from end plate on plasma confinement was studied.\n\nhttp s://indico.inp.nsk.su/event/19/contributions/725/ LOCATION:Budker INP Conference Hall URL:https://indico.inp.nsk.su/event/19/contributions/725/ END:VEVENT BEGIN:VEVENT SUMMARY:Numerical simulation of plasma equilibrium in a diamagnetic trap DTSTART;VALUE=DATE-TIME:20191119T080000Z DTEND;VALUE=DATE-TIME:20191119T082000Z DTSTAMP;VALUE=DATE-TIME:20260608T054654Z UID:indico-contribution-19-726@indico.inp.nsk.su DESCRIPTION:Speakers: Mikhail Khristo (Budker Institute of Nuclear Physics )\nThe recently proposed diamagnetic confinement (DC) mode (diamagnetic “bubble”) is designed to increase plasma parameters in open traps due to a significant increase in confinement time. We constructed a numerical stationary model of the diamagnetic “bubble” equilibrium in an axisymm etric open trap. The theoretical model is based on the Grad-Shafranov equi librium equation and plasma transport equation obtained within the resisti ve magnetic hydrodynamics (MHD) with isotropic pressure. Numerical solutio ns corresponding to the DC mode were found\; they are in good agreement wi th analytical estimates. In particular\, the equilibrium configurations of the future experiments\, such as CAT (DC mode) and GDMT were calculated. The numerical algorithm also allows one to obtain the distribution of the diamagnetic field\, which may help to optimize the position of the wall-st abilization plates. Applying this model\, we investigated the effect of ma gnetic field corrugation on the equilibrium. It is shown that the vacuum f ield corrugation leads to a proportional corrugation of the "bubble" bound ary if the period is small enough.\n\nhttps://indico.inp.nsk.su/event/19/c ontributions/726/ LOCATION:Budker INP Conference Hall URL:https://indico.inp.nsk.su/event/19/contributions/726/ END:VEVENT BEGIN:VEVENT SUMMARY:Single-particle confinement in the diamagnetic trap DTSTART;VALUE=DATE-TIME:20191119T082000Z DTEND;VALUE=DATE-TIME:20191119T084000Z DTSTAMP;VALUE=DATE-TIME:20260608T054654Z UID:indico-contribution-19-727@indico.inp.nsk.su DESCRIPTION:Speakers: Ivan Chernoshtanov (Budker Institute of Nuclear Phys ics)\nThe collisionless dynamic of ions in the axisymmetric diamagnetic tr ap is discussed in the report. Smallness of magnetic field leads to non-co nservation of magnetic moment of ions. It can results in chaotic movement and fast losses of ions. Two mechanisms allowing ions to confine in the tr ap unlimited time (if Coulomb collisions and instabilities are neglected): conservation of adiabatic invariant if magnetic field is smooth enough an d so-called absolute confinement of ions having large azimuthal velocity. So there are different regimes of plasma confinement in the diamagnetic tr ap. This regimes and requirements to magnetic system of the trap are discu ssed.\n\nhttps://indico.inp.nsk.su/event/19/contributions/727/ LOCATION:Budker INP Conference Hall URL:https://indico.inp.nsk.su/event/19/contributions/727/ END:VEVENT BEGIN:VEVENT SUMMARY:Electron-cyclotron and electron-beam plasma startup DTSTART;VALUE=DATE-TIME:20191118T080500Z DTEND;VALUE=DATE-TIME:20191118T082500Z DTSTAMP;VALUE=DATE-TIME:20260608T054654Z UID:indico-contribution-19-728@indico.inp.nsk.su DESCRIPTION:Speakers: Peter Bagryansky (Budker Institute of Nuclear Physic s)\nThe report provides a review of research results aimed at developing a method for generating preliminary plasma in open type magnetic traps usin g ECR gas breakdown. This method has proven positively itself in a number of experiments with plasma heating by neutral beam and auxiliary ECR heati ng at the GDT device. In addition\, the results of recent studies on the d evelopment of a method for generation a preliminary plasma using an electr on beam injected through a magnetic mirror into a trap pre-filled with gas are presented. This method also showed high efficiency\, while demonstrat ing ease of implementation and high reliability. The developed methods are compared with each other and with the traditional method for injecting pr eliminary plasma through a magnetic plug using an arc-type gas discharge s ource. The main conclusion of the work is that both recently developed met hods can be effectively used in installations of the next generations base d on ostrong textpen-type magnetic traps with a linear configuration.\n\nh ttps://indico.inp.nsk.su/event/19/contributions/728/ LOCATION:Budker INP Conference Hall URL:https://indico.inp.nsk.su/event/19/contributions/728/ END:VEVENT BEGIN:VEVENT SUMMARY:Numerical simulation of plasma parameters for ALIANCE project by D OL code DTSTART;VALUE=DATE-TIME:20191118T054000Z DTEND;VALUE=DATE-TIME:20191118T060000Z DTSTAMP;VALUE=DATE-TIME:20260608T054654Z UID:indico-contribution-19-729@indico.inp.nsk.su DESCRIPTION:Speakers: Vadim Prikhodko (Budker Institute of Nuclear Physics )\nAn international mega-science project named ALIANCE (Axisymmetric LInea r Advanced Neutron sourCE) was jointly initiated by INEST CAS and BINP RAS . It is aimed at the development of fusion volumetric neutron sources base d on the GDT concept of plasma confinement. The report reviews the results of numerical simulations of plasma parameters for ALIANCE project done by DOL code. Three devices are considered within the project. The first one will demonstrate the continuous confinement of deuterium plasma in linear device sustained by injection of neutral beam with relatively low power of 0.1 MW. The injection power will rise up to 2 MW in the second device\, w hile the third one will confine D-T plasma heated by the neutral beams wit h a power of 50 MW. Neutron yield for these devices is expected to reach $ 4{\\cdot}10^{9}$ 1/s and $5{\\cdot}10^{13}$ 1/s of D-D neutrons for the fi rst two devices\, respectively\, and $10^{18}$ 1/s of D-T neutrons for the last one.\n\nhttps://indico.inp.nsk.su/event/19/contributions/729/ LOCATION:Budker INP Conference Hall URL:https://indico.inp.nsk.su/event/19/contributions/729/ END:VEVENT BEGIN:VEVENT SUMMARY:Diamagnetic confinement in axially symmetric traps DTSTART;VALUE=DATE-TIME:20191119T073000Z DTEND;VALUE=DATE-TIME:20191119T080000Z DTSTAMP;VALUE=DATE-TIME:20260608T054654Z UID:indico-contribution-19-730@indico.inp.nsk.su DESCRIPTION:Speakers: Alexei Beklemishev (Budker Institute of Nuclear Phys ics)\nThere is a possibility of enhanced plasma confinement in axially sym metric linear traps due to significant modification of equilibrium close t o the upper beta limit. In general this type of equilibrium is highly unst able to ballooning modes while its low internal magnetic field may cause n on-adiabatic particle losses. However\, under special conditions these pro blems can be probably overcome. If achieved\, the enhanced confinement in the diamagnetic "bubble" equilibrium may drastically improve fusion prospe cts of linear traps.\n\nhttps://indico.inp.nsk.su/event/19/contributions/7 30/ LOCATION:Budker INP Conference Hall URL:https://indico.inp.nsk.su/event/19/contributions/730/ END:VEVENT BEGIN:VEVENT SUMMARY:Future perspectives and status of magnetic mirror studies in Novos ibirsk DTSTART;VALUE=DATE-TIME:20191118T033000Z DTEND;VALUE=DATE-TIME:20191118T042000Z DTSTAMP;VALUE=DATE-TIME:20260608T054654Z UID:indico-contribution-19-731@indico.inp.nsk.su DESCRIPTION:Speakers: Alexander Ivanov (Budker Institute of Nuclear Physic s)\nThe report presents an update on the continuing work on open magnetic traps in BINP RAS. It discusses the construction of a gas-dynamic trap wit h improved longitudinal confinement named GDMT\, as well as the experiment s on existing (GDT\, SMOLA) and newly constructed (GOL-NB\, CAT) devices. The report highlights the main experimental achievements obtained on the f acilities of previous generation such as formation of thermal barriers\, p lasma stabilization by sheared rotation and others\, outlining their impor tance for the GDMT project.\n\nhttps://indico.inp.nsk.su/event/19/contribu tions/731/ LOCATION:Budker INP Conference Hall URL:https://indico.inp.nsk.su/event/19/contributions/731/ END:VEVENT BEGIN:VEVENT SUMMARY:Numerical simulation of GDT-based neutron source in DCLC-stable re gimes by DOL code DTSTART;VALUE=DATE-TIME:20191119T035000Z DTEND;VALUE=DATE-TIME:20191119T041000Z DTSTAMP;VALUE=DATE-TIME:20260608T054654Z UID:indico-contribution-19-732@indico.inp.nsk.su DESCRIPTION:Speakers: Vadim Prikhodko (Budker Institute of Nuclear Physics )\nThe paper devoted to simulation of neutron source based on gas-dynamic trap concept. DOL code was used as a main tool for numerical calculations. Stability against Drift-Cyclotron Loss-Cone (DCLC) and Double Hump (DH) m odes is estimated according to [I.A.Kotelnikov\, I.S.Chernoshtanov\, V.V.P rikhodko. Electrostatic instabilities in a mirror trap revisited. Physics of Plasmas v. 24\, p. 122512 (2017)].\n\nhttps://indico.inp.nsk.su/event/1 9/contributions/732/ LOCATION:Budker INP Conference Hall URL:https://indico.inp.nsk.su/event/19/contributions/732/ END:VEVENT BEGIN:VEVENT SUMMARY:Medium Power Thorium Hybrid Plant with GDT-FNS for Long operation time. DTSTART;VALUE=DATE-TIME:20191118T094500Z DTEND;VALUE=DATE-TIME:20191118T100500Z DTSTAMP;VALUE=DATE-TIME:20260608T054654Z UID:indico-contribution-19-733@indico.inp.nsk.su DESCRIPTION:Speakers: Andrey Arzhannikov (Novosibirsk State University)\, Igor Shamanin (National Research Tomsk Polytechnic Univ.)\nThe GDT-FNS med ium-power hybrid thorium plant is an innovative nuclear fission-fusion fac ility constructively consisting of an assembly of hexagonal graphite block s of a uniform design and a long magnetic trap for plasma confinement\, wh ich serves as a source of additional thermonuclear neutrons. The active zo ne of the analyzed hybrid plant consists of areas with different enrichmen t\, contains units to control and management\, as well as other spatially distributed components perturbing the system\, which are affecting the cri ticality of the assembly and the evolution of the nuclear fuel composition . \nResearch conducted as part of this work is aimed at solving two key pr oblems. The first task is to study the effect of Pa-233 protactinium on th e fulfillment of the condition k=const under conditions of excess reactivi ty + dk/k\, which is created using "starting" fission nuclides\, which is necessary for the reactor to operate in the first day at starting its oper ation. Another task is related to the modeling of neutron-physical paramet ers during long-term operation of the assembly in stationary and cyclicall y changing non-stationary operating modes. The results obtained in the cou rse of solving the tasks set in the work will improve the safety of a hybr id thorium reactor with an elongated neutron source based on a magnetic tr ap in a long working cycle.\n\nhttps://indico.inp.nsk.su/event/19/contribu tions/733/ LOCATION:Budker INP Conference Hall URL:https://indico.inp.nsk.su/event/19/contributions/733/ END:VEVENT BEGIN:VEVENT SUMMARY:Diagnostic instrumentation for the next generation of GDT devices DTSTART;VALUE=DATE-TIME:20191118T082500Z DTEND;VALUE=DATE-TIME:20191118T084500Z DTSTAMP;VALUE=DATE-TIME:20260608T054654Z UID:indico-contribution-19-734@indico.inp.nsk.su DESCRIPTION:Speakers: Andrej Lizunov (Budker Institute of nuclear physics) \nDevices of the GDT type belonging to the next generation are being propo sed for a vast range of scientific and technological applications\, includ ing fusion neutron sources\, hybrid fission-fusion power plants and others . The next step GDT-like system is deemed as a large-scale installation su staining plasmas with a significant fusion power generation in a stationar y or long-pulse regime. The paper describes several new diagnostics and ph ysical data acquisition and processing systems developed in the Budker Ins titute for forthcoming fusion plasma experiments.\n\nThe combined diagnost ic based on the motional Stark effect and laser induced fluorescence (MSE- LIF) inherits advantages of the spectral and polarimetric MSE versions to measure the magnetic field value and direction. The presented project of t he MSE-LIF diagnostic at GDT is close to the final assembling and commissi oning.\n\nThe recently upgraded diagnostic of laser Thomson scattering at GDT has six spatial points for measurements of the electron temperature an d density. The scattered light is analyzed by filter spectrometers of the innovative design using time-stretch digitizers. The planned second phase of the diagnostic enhancement is installation of the multi-pulse Nd:YAG la ser for a sub-millisecond time resolution in every plasma shot.\n\nThe pap er discusses the development of series of data acquisition and analysis el ectronic devices for physical experiments. The instruments range from the compact isolated ADC with the optical fiber data link to the complete data collection and processing system for the vertical neutron camera (VNC) fo r the ITER project and similar large-scale machines with high radiation co nditions.\n\nhttps://indico.inp.nsk.su/event/19/contributions/734/ LOCATION:Budker INP Conference Hall URL:https://indico.inp.nsk.su/event/19/contributions/734/ END:VEVENT BEGIN:VEVENT SUMMARY:The neutron field in a hybrid reactor operating with GDT-FNS in a pulse-periodic mode. DTSTART;VALUE=DATE-TIME:20191118T100500Z DTEND;VALUE=DATE-TIME:20191118T102500Z DTSTAMP;VALUE=DATE-TIME:20260608T054654Z UID:indico-contribution-19-735@indico.inp.nsk.su DESCRIPTION:Speakers: Vladimir Shmakov (All-Russian Research Center VNIITF )\nTo study three-dimensional neutron flux and heat generation fields in a reactor facility with a modified axial region operating in a subcritical mode with thermonuclear neutrons generated by an extended plasma neutron s ource\, a computational model has been developed under utilizing a Serpent -Prizma program code.\nThe studies are conducted for a radially profiled r eactor core consisting of areas with different composition of nuclear fuel and containing elements of control and management of sub-criticality. The evolution of the sub criticality of the assembly and the nuclide composit ion of nuclear fuel is studied as well as the influence of these factors o n the nuclear and technological safety of a hybrid system is analyzed when operating in a pulse-periodic mode.\n\nhttps://indico.inp.nsk.su/event/19 /contributions/735/ LOCATION:Budker INP Conference Hall URL:https://indico.inp.nsk.su/event/19/contributions/735/ END:VEVENT BEGIN:VEVENT SUMMARY:The dynamics of energy release in a hybrid reactor operating with GDT-FNS in a pulse-periodic mode. DTSTART;VALUE=DATE-TIME:20191118T102500Z DTEND;VALUE=DATE-TIME:20191118T104500Z DTSTAMP;VALUE=DATE-TIME:20260608T054654Z UID:indico-contribution-19-736@indico.inp.nsk.su DESCRIPTION:Speakers: Igor Shamanin (National Research Tomsk Polytechnic U niv.)\nResults of our studies of the dynamics features of energy release i n a hybrid thorium reactor facility with an extended neutron source based on a long magnetic trap are presented in the paper. In the studied configu ration of the active zone\, a high-temperature plasma column is formed in a pulse-periodic mode\, and with certain combinations of the “thermonucl ear combustion” pulse duration and duty cycle. We should expect the form ation of the fission reaction that is diverging from the axial part of the system and spreading over the volume of the fuel assembly (blanket) in th e radial direction. In such conditions\, in order to level the resulting o ffset of energy release\, there is a need to optimize the fuel composition of the assembly in order to achieve most appropriate radial distribution of physical parameters. The studies are carried out on the basis of a full -scale model of the reactor core in which axial region is modified by a lo ng magnetic trap operating with plasma as the source of fusion neutrons.\n \nhttps://indico.inp.nsk.su/event/19/contributions/736/ LOCATION:Budker INP Conference Hall URL:https://indico.inp.nsk.su/event/19/contributions/736/ END:VEVENT END:VCALENDAR