2019, Vovchenko, E. D., Krat, S. A., Kostyushin, V. A., Khar'kov, M. M., Bulgadaryan, D. G., Prishvitsyn, A. S., Stepanova, T. V., Kurnaev, V. A., Zakharov, L. E., Вовченко, Евгений Дмитриевич, Крат, Степан Андреевич, Харьков, Максим Михайлович, Пришвицын, Александр Сергеевич, Степанова, Татьяна Владимировна

© 2019, Pleiades Publishing, Ltd.The paper reports results of studying the geometry of craters formed by the action of laser pulses on solid-state targets of aluminum and lithium films at a power density on the target of (1–5) × 1010 W/cm2 and variation of the number of pulses in the range of 1–150, as well as the results of ex situ layer-by-layer analysis of lithium films on quartz coatings carried out using the method laser induced breakdown spectroscopy to determine the thickness of the films.

2021, Arkhipov, I., Grashin, S., Zibrov, M., Pisarev, A., Babich, Y., Berdnikova, M., Gasparyan, Y., Gutorov, K., Efimov, V., Isaenkova, M., Krat, S., Krymskaya, O., Kurnaev, V., Stepanova, T., Vovchenko, E., Vizgalov, I., Писарев, Александр Александрович, Бердникова, Мария Михайловна, Гаспарян, Юрий Микаэлович, Гуторов, Константин Михайлович, Ефимов, Виталий Сергеевич, Исаенкова, Маргарита Геннадьевна, Крат, Степан Андреевич, Крымская, Ольга Александровна, Степанова, Татьяна Владимировна, Вовченко, Евгений Дмитриевич

© 2020 Elsevier B.V.Surfaces facing the gap between W tiles of the ring limiter of tokamak T-10 were analyzed after T-10 decommissioning using LIBS, SEM/EDA, XRD, TDS, and NRA techniques. Gaps with the width of 5 mm and 0.1 mm were nearly completely covered to their full depths of 22 and 15 mm, respectively, by a deposited film. The film was formed mainly by deposition of lithium that came from Li limiter and transformed in air to Li2CO3 and Li2O. Carbon was deposited from volatile hydrocarbons sputtered from the tokamak walls. Besides, carbon appeared due to chemical reaction with lithium in air. Chemical interactions of W with C, O, and Li led to formation W2C, WC, WO2, and Li2WO4. Carbides formed in W over the entire surface to the full depth of the gaps. Trapping of deuterium and helium in tiles was demonstrated. Possible influence of auto-oscillating discharges on ionization and ion trapping of C,D, and He in gaps is discussed.

2021, Kurnaev, V. A., Nikolaeva, V. E., Krat, S. A., Vovchenko, E. D., Kaziev, A. V., Prishvitcyn, A. S., Vorobiev, G. M., Stepanova, T. V., Gvozdevskaya, D. S., Крат, Степан Андреевич, Вовченко, Евгений Дмитриевич, Казиев, Андрей Викторович, Пришвицын, Александр Сергеевич, Степанова, Татьяна Владимировна

© 2021, Springer Science+Business Media, LLC, part of Springer Nature.At the Institute for Laser and Plasma Technologies of NRNU MEPhI, a compact spherical tokamak MEPhIST (MEPhI-Spherical Tokamak) has been developed and constructed for educational, demonstrational and research purposes. The creation of plasma diagnostic systems involves several stages, determined by a successive complication of the plasma research tasks, the device upgrading and the development of educational and methodological materials for the laboratory works to be performed at the tokamak. Testing of the in situ methods for analyzing the plasma-surface interaction is one of the main scientific and technological goals set for this tokamak. The diagnostic complex described in the paper provides cumulative information on the processes occurring after the plasma-surface contact; it represents a set of very informative and well-tested diagnostic tools that allow the students to obtain visual reliable information on the processes occurring in the tokamak vacuum vessel.