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Information × Registration Number 0210U004441, 0109U007872 , R & D reports Title Investigation of processes and erosion mechanisms during powerfull plasma streams interaction with material surfaces relevant to thermonuclear reactor ITER. Development of spectroscopy methods of analysis of the plasma-surface interaction. popup.stage_title Head Garkusha Igor Evgenievich, Доктор фізико-математичних наук Registration Date 23-12-2010 Organization National Science Center "Kharkiv Institute of Physics and Technology popup.description2 Investigation of plasma-surface interaction was executed with bringing in of powerful plasma streams, which were generated two distinct different plasma systems. One of them is the queasy-steady-state accelerator QSPA Kh-50 with a pulse duration 250 mks and protons energy to 0, 6 keV, thermal loading - to 30 MJ/m2. The targets of different materials (C, F, Al, Ti, Cu, and W) were exposed by powerful plasma streams at the identical amount of pulses at athwart and under the different angles of slope. The experiments showed that dense plasma-surface layers are protected target material from a direct contact with plasma. The density value in such layers is greater on an order than in free plasma stream. It is defined that low magnitude of electron temperature (Te 2-2.5 eV) near-by a surface is explained the radiation cooling and transmission of energy through an electron heat-conducting. Intensity of radiation from a plasma-surface layer, that is measured a piroelectron bolometer, in 7 - 10 times more than in the free plasma stream. On large distances Te value is more than 5-7 eV. Maximum temperatures are corresponding to initial stage (10-15 mks) of plasma-surface interaction. For the studying processes of interaction deuterium pulse plasma streams with tungsten the plasma injector RPI-IBIS was attracted, which are function in A.Soltan Institute of Nuclear Problems (IPJ) in Poland. Measurements were carried out by optical spectroscopy and corpuscular diagnostic methods. The operation regime of injector was choosing by generation of clean deuterium plasma. For this purpose the so-called "slow" mode (plasma-ion deposition) was selected. The time delay was t = 140 mks. Pulse duration was 6 mks, and maximal value of ions energy was 40 keV. One of main tasks there was registration and identification of tungsten spectral lines WI and WII. On the basis of the spatial and temporal measurements of spectral line of Dbeta the maximal tungsten plasma layer density was estimated - 3.4*10(16) cm (-3), that appeared near-by a target during plasma-surface interaction. The obtained results - optical spectra and other plasma characteristics demonstrate applicability of RPI-IBIS device for researches of interaction plasma streams with materials, for example, testing of some internal parts for thermonuclear reactors. Product Description popup.authors І.Є.Гаркуша А.М.Бандура В.І.Терешин В.А.Махлай В.В.Чеботарьов В.С. Войценя В.С. Таран Г.К. Марченко Д.В. Єлісєєв Д.Г.Соляков М.В. Кулик М.С. Ладигіна О.В.Бирка О.М. Швець Ю.В. Петров popup.nrat_date 2020-04-02 Close