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Information × Registration Number 0308U001666, 0106U001575 , R & D reports Title Interaction of electromagnetic waves and particles fluxes with materials in plasma installations popup.stage_title Поглинання поверхневих іонно-звукових хвиль при їх розповсюдженні уздовж межі поділу діелектрик-плазма. Вплив іонного компонента плазми (водню та інших іонів) на склад та фізичні властивості оксидних матеріалів Head Girka Igor Olexandrovich, Registration Date 15-02-2008 Organization Kharkov national university named after V.N. Karazin popup.description2 Object of investigation: Transient induced radiation and transient dissipation in dusty plasma, dimension of strange attractors and influence of ion component of plasma on the properties of crystals and ceramics of magnesium aluminate spinel at irradiation in plasma devices. Aim of investigation: Elaboration of the numerical algorithms of calculating the spectra of transient radiation and dissipations in dusty plasma with taking into account the macro-particles of different geometry. Elaboration of the numerical algorithms of calculating the fractal dimension of strange attractors. Determination of the parameters of crystals and ceramics such as absorption spectra, radio-luminescence, accumulation and evolution of defectsat ion bombardment in the wide range of doses. Method of investigations: Studying the spectra of transient induced radiation and transient dissipation in dusty plasma was carried out using the numerical methods of calculation of induced density of surface charges and currents on charged frames with composite geometry which were specially designed. Fractal dimension of strange attractors was calculated numerically on the base of Tackense theorem for temporary implementations. Mechanisms of accumulation of defects at the helium ion bombardment, their evolution at the growth of temperatures of samples were investigated by methods of optical spectroscopy, radio-luminescence, and optical microscopy. Interest to the problem of interaction of potent powerful flows with a wall of fusion reactors, i.e. to "the problem of the first wall" has essentially increased recently. The wall can evaporate and inject dusty particles into the plasma.. It is rather probably, that the formation of such plasma-dust layer on the plasma edge can appear to be essential for the plasma confinement as a whole for long duration and large flows in the future thermonuclear devices. Studying the basic properties of dusty plasma becomes an actual problem also because the charged macro-particles can stimulate originating of turbulent modes in it. As a result of measurements of the optical properties of helium-implanted spinel crystals have been used to obtain information on the formation of point defects and their evolution during thermal annealing. Optical absorption spectra showed that the main defects in helium-implanted spinel were the anion vacancies which were removed by annealing to 1000K. Additional defects in implanted and annealed specimens were observed and are related to cation vacancies and antisite defects. The results of this activity can be used for the solution of problems of the thermonuclear devices with magnetic confinement, in which the dusty plasma is found. With the help of the artificial introduction of dusty particles of the given geometry and structure to the plasma-dust layer one can purposefully control the processes, which take place in the thermonuclear devices. The change of parameters of crystals and ceramics at ion bombardment to different doses will be used for prediction of changes in propertiesof materials at the influence of plasma factors. Product Description popup.authors popup.nrat_date 2020-04-02 Close