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Information × Registration Number 0201U003795, 0100U003299 , R & D reports Title Electrodynamical and optical properties of the fractal and superdimensional systems popup.stage_title Head Girka I.O., Registration Date 26-04-2001 Organization Kharkov National University named after V.N. Karazin popup.description2 Object of investigation — drift ions trajectories in toroidal trap of stellarator type (torsatron), surface layer insulator-plasma, spinel crystals with impurity of transition metals such as Mn, Cr, Fe. Purpose of investigation — finding methods of impurities motion control in toroidal plasma trap like stellarator/torsatron, in particular, methods of elimination of impurities from volume of plasma confinement or prevent the receipt of impurities to the plasma. The influence of transition layer on the absorption of electromagnetic wave with frequency less then Langmuir frequency during inclined fall from insulator onto plasma has been investigated. The influence of metals transition to optical centers of spinel crystals and formation of over structural formations during neutron irradiation has been also investigated. Methods of investigation — drift trajectories of particles are found from solving the equations of particle leading center by numerical 4-th degree Runge-Cutt method, theoretical analysis a nd numerical calculation on computer, investigation of optical absorption spectra of virgin, irradiated and annealed after irradiation crystals. Motion of impurity ion in screw like field with the presence of additional screw perturbation of time depended magnetic field has been investigated. main task of this work is finding of way for elimination of impurity ions from volume of confinement in stellarators/torsatrons or prevent the receipt of impurities to the plasma. It was shown that electrons absorb electromagnetic wave that is reflected from plasma and they are slowed down in insulator-plasma interface and is reflected either from wall or from potential barrier inside the layer. It was shown that addition of impurities of transition metals causes increase of efficiency of point defects and complexes production during neutron irradiation. The results could be applied in powerful HF electronics, in nuclear fusion investigations. Product Description popup.authors popup.nrat_date 2020-04-02 Close