2021_Взаимодействие ионов с поверхностью (ВИП)
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- ПубликацияОткрытый доступЗАХВАТ И УДЕРЖАНИЕ ГАЗОВ В СЛОЯХ, ОБРАЗУЕМЫХ НА МЕТАЛЛАХ, ПРИ ПЛАЗМЕННОМ ОСАЖДЕНИИ АТОМОВ АЛЮМИНИЯ(НИЯУ МИФИ, 2021) Беграмбеков Л. Б.; Довганюк, С. С.; Рукина, Ю. Г.; Касимова, Н. Н.; Беграмбеков, Леон Богданович; Довганюк, Сергей СергеевичIn this work, a thermal desorption study of the formation and modification of layers formed by the deposition of aluminum atoms on the surface of tungsten, molybdenum, titanium, nickel, iron and stainless steel was carried out. The features of the capture of hydrogen during the formation of surface layers on various metals and the nature of its retention are revealed.
- ПубликацияОткрытый доступCOMPARISON OF DEUTERIUM RETENTION IN TUNGSTEN AND WCrY ALLOY IN THE PRESENCE OF HELIUM(НИЯУ МИФИ, 2021) Harutyunyan, Z.; Gasparyan, Yu.; Pisarev, A.; Litnovsky, A.; Klein, F.; Linsmeier, Ch.; Писарев, Александр Александрович; Гаспарян, Юрий Микаэлович; Арутюнян, Зорий РобертовичDuring operation of the future fusion power plant, the plasma-facing components (PFC) will be exposed to intense fluxes of particles of deuterium, tritium, helium, as well as neutrons arising in the process of the D–T fusion reaction. In this regard, one of the important challenges is to minimize the accumulation of radioactive tritium in the PFC [1, 2], as well as to study the effect on the accumulation of helium impurities in the plasma.
- ПубликацияОткрытый доступDust in tokamak and related safety open issues(НИЯУ МИФИ, 2021) Grisolia, С.During fusion machine operation and due to plasma wall interaction, particles/dust will be created (size ranging from nanometer to tens of micron). Different morphologies of dust are expected to be produced from spherical particles induced by melting of metal after high heat flux interactions (unipolar arcs, ELMs,...) to fractal ones created by accretion. The later point is confirmed by dust collection in a full tungsten (W) environment machine, the WEST tokamak. Indeed, among the collected particles, spherical and complex shape submicron-sized ones are found. Their high specific surface area can be associated with high physico-chemical reactivity.
- ПубликацияОткрытый доступDeuterium trapping in co-deposited layers of ITER-relevant materials(НИЯУ МИФИ, 2021) Krat, S. A.; Prishvitsyn, A. S.; Vasina, Ya. A.; Fefelova, E. A.; Gasparyan, Yu. M.; Pisarev, A. A.; Писарев, Александр Александрович; Гаспарян, Юрий Микаэлович; Крат, Степан Андреевич; Пришвицын, Александр СергеевичHydrogen isotope accumulation in fusion devices is a serious problem. Because deuterium-tritium mixture will be a working gas in future fusion devices, including ITER tokamak, tritium accumulation is an issue from the perspective of radiation safety. In total, only 700 grams of tritium are allowed to be present in ITER vessel at any time, with additional 120 in the cryopumps, and 180 grams allocated to measurement error, to the total of 1000 grams.
- ПубликацияОткрытый доступВРЕМЯ-РАЗРЕШЕННАЯ ФОТОЛЮМИНЕСЦЕНЦИЯ Al2O3, ОБЛУЧЕННОГО ТЯЖЕЛЫМИ ИОНАМИ С ЭНЕРГИЕЙ 1.2 – 3 МэВ/АЕМ(НИЯУ МИФИ, 2021) Маматова, М.; Скуратов, В. А.; Олейничак, А.; Даулетбекова, А. К.; Гиниятова, Ш. Г.; Скуратов, Владимир АлексеевичTime Correlated Single Photon Counting technique has been used to study the luminescence decay in Al2O3 irradiated with swift heavy ions. As was found, picosecond laser pulse excitation at 445 nm enhances broad overlapped emission bands ranging from 490 to 750 nm with lifetimes gradually increasing from 7 ns (500 nm) to τ = 9 ns (640 nm). The nature of this luminescence is associated with radiative recombination of F2 2+-centers and F2 2+-centers + Cr impurity.
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