Персона: Шатохин, Вадим Леонидович
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Институт лазерных и плазменных технологий
Стратегическая цель Института ЛаПлаз – стать ведущей научной школой и ядром развития инноваций по лазерным, плазменным, радиационным и ускорительным технологиям, с уникальными образовательными программами, востребованными на российском и мировом рынке образовательных услуг.
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- ПубликацияТолько метаданныеEnergy Efficiency Enhancement of Ionic Diode for Neutron Generation with Electronic Conduction Suppression by the Field of a Permanent Magnet(2019) Vovchenko, E. D.; Kozlovskii, K. I.; Lisovskii, M. I.; Rashchikov, V. I.; Shikanov, A. E.; Shatokhin, V. L.; Вовченко, Евгений Дмитриевич; Козловский, Константин Иванович; Ращиков, Владимир Иванович; Шиканов, Александр Евгеньевич; Шатохин, Вадим Леонидович© 2019, Springer Science+Business Media, LLC, part of Springer Nature.In order to use neutron generators in applied research, it is important to increase the energy efficiency of neutron generation. For high accelerating voltages, diodes with magnetic insulation are used to suppress electron emission from the cathode in neutron accelerator tubes. A mathematical model describing the dynamics of charged particles in the axial diode with insulation of electrons by the field of a permanent magnet is studied. The model is used to perform a computer experiment that shows a reduction of insulation near the ends of the magnet, which permits up to 40% of the electrons from the cathode to reach the anode of the accelerator tube. An option for making the magnetic insulation more efficient by adding into the magnetic system diaphragms placed in the end zones of a cylindrical cathode is proposed and studied.
- ПубликацияТолько метаданныеModel of Laser Plasma Acceleration in the Fields of a Spiral Electrodynamic Line(2019) Shikanov, A. E.; Vovchenko, E. D.; Kozlovskij, K. I.; Shatokhin, V. L.; Шиканов, Александр Евгеньевич; Вовченко, Евгений Дмитриевич; Козловский, Константин Иванович; Шатохин, Вадим ЛеонидовичThe acceleration of a plasmoid, for the formation of which a conical spiral expanding in the direction of the expected plasma acceleration is used, in a rapidly increasing magnetic field of complex geometry has been considered. An algorithm for calculating the longitudinal magnetic field in the approximation of replacing a spiral line with a system of rings of variable radius has been presented. A mathematical model that is based on the interaction of the plasmoid magnetic moment with gradient of the longitudinal magnetic field decay has been proposed to analyze the efficiency of the acceleration. The possibility of deuterons reaching an average speed exceeding 10(6) m/s has been shown.
- ПубликацияТолько метаданныеCompact Induction Accelerator of Laser Plasma for Ion Energy up to 1 MeV(2020) Vovchenko, E. D.; Kozlovskij, K. I.; Shikanov, A. E.; Karimov, A. R.; Rashchikov, V. I.; Shatokhin, V. L.; Isaev, A. A.; Deryabochkin, O. V.; Вовченко, Евгений Дмитриевич; Козловский, Константин Иванович; Шиканов, Александр Евгеньевич; Каримов, Александр Рашатович; Ращиков, Владимир Иванович; Шатохин, Вадим Леонидович; Дерябочкин, Олег Владимирович© 2020, Pleiades Publishing, Ltd.Abstract: The collective acceleration of laser plasma ions in a rapidly increasing magnetic field (108 T/s) excited by a powerful current pulse in a low-inductive conical spiral expanding in the direction of plasma acceleration has been studied. A mathematical model and an algorithm for calculating the radial Br and axial Bz components of the magnetic field in the approximation of a conical spiral by a system of rings of variable radius are proposed to analyze the factors affecting the efficiency of such acceleration. Based on computer modeling and an experimental variation of magnetic-field excitation parameters, the regime of effective ion acceleration is obtained. With the help of time-of-flight collector measurements, the velocities of ions whose atomic mass differs by two orders of magnitude are determined. The maximum velocity of both light ions (lithium) and heavy ions (lead) exceeds 106 m/s, and the corresponding energy for lead ions is ~1 MeV. The efficiency of collective acceleration with the direct acceleration of laser plasma ions in a high-current high-voltage diode with magnetic insulation is compared.
- ПубликацияТолько метаданныеOPTIMIZATION OF ACCELERATORS VACUUM STRUCTURES PUMPING(2021) Polozov, S. M.; Panishev, A. S.; Shatokhin, V. L.; Полозов, Сергей Маркович; Панишев, Александр Сергеевич; Шатохин, Вадим Леонидович© 27th Russian Particle Accelerator Conference, RuPAC 2021. All rights reserved.The pumping features for the complex parts of the accelerator vacuum system are modelled to growth the efficiency of vacuum pumping. The vacuum system of a 7.5 MeV/nucleon proton and light ion (A/Z<3.2) accelerator-injector was considered. The Monte Carlo method is suitable for molecular flow modelling in high vacuum. The Molflow+ program was used for this aim. The pressure distribution simulation over the RFQ, IH resonators chambers volume, connecting vacuum pipes and extended vacuum tracts is carried out. The influence of parameters of individual structural elements changes was investigated to define the vacuum conditions inside the accelerators vacuum chambers. The vacuum system configuration and parameters are selected basing on these results to obtain the required vacuum level.
- ПубликацияТолько метаданныеSTATUS OF THE SC HWR CAVITIES PRODUCTION FOR NICA PROJECT(2021) Butenko, A.; Syresin, E.; Trubnikov, G.; Nikiforov, D.; Gusarova, M.; Lalayan, M.; Matsievskiy, S.; Nemchenko, R.; Polozov, S.; Sobenin, N.; Shatokhin, V.; Гусарова, Мария Александровна; Лалаян, Михаил Владимирович; Мациевский, Сергей Викторович; Полозов, Сергей Маркович; Шатохин, Вадим Леонидович© 27th Russian Particle Accelerator Conference, RuPAC 2021. All rights reserved.Since 2015 the superconducting (SC) linac-injector development for Nuclotron NICA (JINR, Dubna, Russia) is carried out by the collaboration of JINR, NRNU MEPhI, INP BSU, PTI NASB. This new SC linac is to accelerate protons up to 20 MeV and light ions to 7.5 MeV/u with possible energy upgrade up to 50 MeV for proton beam. This paper reports the current status of the development and manufacturing of superconducting accelerating cavities for a new linear accelerator of the injection complex of the Nuclotron-NICA project.
- ПубликацияТолько метаданныеTHE CONCEPTUAL DESIGN OF THE 7.5 MeV/U LIGHT ION INJECTOR(2021) Zavyalov, N. V.; Smetanin, M. L.; Telnov, A. V.; Polozov, S. M.; Aksentyev, A. E.; Bulgacheva, M. M.; Deryabochkin, O. A.; Dmitriev, M. S.; Dmitriyeva, V. V.; Dyakonov, M. V.; Dyubkov, V. S.; Gerasimenko, A. V.; Gorchakov, A. A.; Gusarova, M. A.; Guzov, M. A.; Indiushnii, E. N.; Ivanov, O. A.; Korshunov, A. M.; Kozlovskiy, K. I.; Krasnov, A. S.; Lalayan, M. V.; Lozeev, Y. Y.; Lozeeva, T. A.; Makarov, A. I.; Matsievskiy, S. V.; Melekhov, A. P.; Murygin, O. V.; Nemchenko, R. E.; Novikov, G.; Novozhilov, A. E.; Panishev, A. S.; Pashentsev, V. N.; Plotnikov, E. A.; Ponomarenko, A. G.; Prokopenko, A. V.; Rashchikov, V. I.; Samoshin, A. V.; Savchik, A. A.; Shatokhin, V. L.; Shikanov, A. E.; Smirnov, K. D.; Tsarev, G. A.; Tumanov, S. A.; Yurin, I. A.; Zhigailova, M. I.; Полозов, Сергей Маркович; Аксентьев, Александр Евгеньевич; Булгачева, Маргарита Максатовна; Дерябочкин, Олег Владимирович; Дмитриев, Максим Сергеевич; Дмитриева, Валентина Викторовна; Дьяконов, Максим Валентинович; Дюбков, Вячеслав Сергеевич; Гусарова, Мария Александровна; Гузов, Максим Алексеевич; Индюшный, Евгений Николаевич; Иванов, Олег Александрович; Козловский, Константин Иванович; Краснов, Артем Сергеевич; Лалаян, Михаил Владимирович; Лозеев, Юрий Юрьевич; Лозеева, Татьяна Андреевна; Мациевский, Сергей Викторович; Мелехов, Андрей Петрович; Мурыгин, Олег Викторович; Новиков, Григорий Григорьевич; Новожилов, Александр Евгеньевич; Панишев, Александр Сергеевич; Пашенцев, Владимир Николаевич; Плотников, Евгений Александрович; Пономаренко, Алексей Гаврилович; Прокопенко, Александр Валерьевич; Ращиков, Владимир Иванович; Самошин, Александр Вячеславович; Савчик, Алексей Александрович; Шатохин, Вадим Леонидович; Шиканов, Александр Евгеньевич; Туманов, Сергей Алексеевич; Юрин, Илья Андреевич; Жигайлова, Марина Ивановна© 27th Russian Particle Accelerator Conference, RuPAC 2021. All rights reserved.The new linac for light ion beam injection is under development at MEPhI. Such linac was proposed for acceleration of 7.5 MeV/nucleon ion beam with A/Z=1-3.5 and current up to 5 mA for proton and 0.4 pmA for light ions. The linac general layout will include two types of ion sources: ECR ion source for proton and He ions and laser ion source for ions form Li to O. Following the LEBT ions will be bunched and accelerated to the final energy using RFQ section and 14 IH-cavities. These IH-cavities will be identical (divided into two groups) and independently phased. All cavities will operate on 81.25 MHz. Results of the beam dynamics simulations and the cavities design will be presented in the report.
- ПубликацияТолько метаданныеVACUUM CONDITION SIMULATIONS FOR VACUUM CHAMBERS OF SYNCHROTRON RADIATION SOURCE(2021) Polozov, S. M.; Dyubkov, V. S.; Shatokhin, V. L.; Panishev, A. S.; Полозов, Сергей Маркович; Дюбков, Вячеслав Сергеевич; Шатохин, Вадим Леонидович; Панишев, Александр Сергеевич© 27th Russian Particle Accelerator Conference, RuPAC 2021. All rights reserved.Analysis of gas loads for the vacuum system chambers of the 6GeV synchrotron radiation (SR) source are carried out. The main source of gas loads is the photostimulated desorption induced by SR. The influence of storage ring lattice, geometric dimensions and beam parameters on the vacuum conditions in SR-source prototype chambers is studied. The geometric model of the storage ring chamber designed for simulation is considered. The simulation of the radiation flux parameters generated by the charged particles passing through the section of the vacuum chamber has been performed. The technique of calculating the parameters of SR and photostimulated desorption by means of Synrad+ and Molflow+ codes is applied.