2019, Kaziev, A. V., Kolodko, D. V., Ageychenkov, D. G., Tumarkin, A. V., Kharkov, M. M., Stepanova, T. V., Казиев, Андрей Викторович, Колодко, Добрыня Вячеславич, Агейченков, Дмитрий Григорьевич, Тумаркин, Александр Владимирович, Харьков, Максим Михайлович, Степанова, Татьяна Владимировна

In present contribution we report the first direct measurements of ion fluxes in a nonsputtering magnetron discharge (NSMD) with Al cathode in Ar/O-2 mixtures. The diagnostic unit comprising three-electrode electrostatic lens ion extractor, magnetic sector mass-analyzer, and a vacuum electron multiplier was calibrated and then used to record the time-resolved ion counts of Al+ and Ar+ both in NSMD and arc regimes. The results clearly indicate that in NSMD the dominant species are Ar ions while Al ion signal is lower than the sensitivity limit due to noise level, in contrast to the arc discharge. The capabilities of the diagnostics setup and its sensitivity limits are discussed.

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, 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.