Search academic texts

Information × Registration Number 0223U000719, 0121U109590 , R & D reports Title Elaboration of new methods for generating regular and stochastic electromagnetic radiation in beam-plasma systems and high-gradient acceleration of charged particles with fields excited by high-current beams and powerful laser pulses. Simulation of electric discharges of different type for search of effective modes in nonequilibrium plasma chemistry popup.stage_title Head Onishchenko Ivan M, д.ф.-м.н. Registration Date 19-01-2023 Organization National Science Center "Kharkiv Institute of Physics and Technology" popup.description2 It is proved that transformation of low-frequency wave energy into high-frequency wave energy in non-reciprocal medium is possible provided that the matrix elements of interacting waves are also non-reciprocal. The range of parameters in system of three-wave interaction of waves in magneto-active plasma is found for which such transformation exists. The theory of wakefield excitation by a relativistic electron bunch in polar semiconductor plasma is developed, in which the spatio-temporal structure of excited field was obtained and investigated it was shown that excited wake field in infrared frequency range consists of a longitudinal optical plasmons field and Cherenkov electromagnetic radiation. The evolution of focusing force acting on electrons bunches during the wakefield excitation in plasma, depending on the bunch length and distance between the bunches for different profiles of bunch charge, was studied by 2D numerical simulation. It is shown that the behavior of a focusing force in all cases is determined by dynamics of wakefield excited by bunches with taken parameters. In the problem of laser inertial thermonuclear fusion, the heating of plasma electrons by electron soliton cavities formed by an s-polarized laser pulse was investigated. In the problem of heavy-ion inertial thermonuclear fusion based on a linear induction accelerator, parameters of magnetic system and compensating electron beam were found, for which accelerated high-current ion beam preserves monoenergeticity and cross section at the exit from drift interval. Numerical modeling revealed that in barrierless plasma-chemical reactors, with significant decrease in relative content of electronegative components the voltage range in which the Trichel pulse regime is realized narrows. The electrodynamic characteristics of TM wave excited by an electron beam in a cylindrical waveguide with sinusoidally corrugated walls in the azimuth which is located in an external magnetic field, were investigated Product Description popup.authors Balakirev Volodymyr Artemovych Maslov Vasyl Ivanovych Sotnikov Gennadij Vasylyovych Fedorivska Olga V popup.nrat_date 2023-01-19 Close