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Information × Registration Number 0226U002854, (0123U101803) , R & D reports Title Transport processes and kinetics of low-temperature and fusion plasmas popup.stage_title Результати досліджень процесів перенесення в дугових розрядах та термоядерній плазмі. Head Denysenko Ihor B., Доктор фізико-математичних наук Registration Date 09-03-2026 Organization V.N. Karazin Kharkiv National University popup.description1 The aim of this project is to develop a theory and a methodology for description of transport processes in low-temperature and fusion plasmas using kinetic approaches. To achieve this aim, it is planned to solve the following tasks: to develop an arc discharge model for the convective mode of evaporation of a metal anode; to study how the speed of vapor expansion in the near-anode layer depends on the temperature of anode and the current flowing through the discharge, as well as to investigate the properties of the arc discharge under these conditions; to describe the processes in the near-anode layer using phenomenological approaches, as well as using the Boltzmann kinetic equation; to develop theoretical and numerical models describing motion of nanoparticles in an afterglow plasma with taking into account that the charging of nanoparticles is a stochastic process, and using these models to investigate how the motion and deposition of nanoparticles on surfaces depend on external conditions; to study the conditions of formation of low-energy ion beams with a high current density in the plasma created by a source based on an arc discharge with a thermocathode; to determine the conditions for the formation of a double layer of volume charge around the plasma created in the vapors of the anode material; to investigate the conditions for the formation of H– ions near the metal hydride cathode and to develop methods for their effective extraction; to obtain the dispersion characteristics of low-frequency waves in 2D tokamaks taking into account the toroidal magnetic drift of both untrapped and trapped plasma particles, their finite Larmor radius and the finite width of their banana trajectories. A revision of the Braginsky standard transport model is planned to include the electron relativity and to find relativistic corrections to the transport coefficients. A relativistic generalization of the neoclassical transport theory for toroidal systems is also planned. popup.description2 Within the framework of this research work, a significant contribution has been made to solving fundamental and actual problems of physics of low-temperature and thermonuclear plasmas, in particular those related to transport problems. New physical and numerical models have been developed to describe the processes of transport, charging and motion of nanoparticles in afterglow plasma, taking into account that their charging is a stochastic process. New knowledge has been obtained regarding the charge and motion of nanoparticles in afterglow plasma. It has been established how the working gas pressure, the temperature on the anode surface, and the current density near the anode affect the properties of the near-anode region. The regularities of the influence of the metal hydride cathode on the processes of transfer and formation of negative hydrogen ions in plasma have been established, and a methodology and numerical model for calculating the trajectories of negative ions for their separation from the flow of charged particles emerging from the Penning discharge plasma have been developed. Experimental studies of the near-surface formation of low-energy ion and electron beams in the plasma of an arc discharge with a thermionic cathode were conducted. The processes of formation of a double layer of volume charge around the plasma created in the vapors of the anode material, as well as the effect of electron and ion beams of high current density on the surface of solids were experimentally investigated. A new method for solving the linearized relativistic drift-kinetic equation in a toroidal plasma and closing the system of transport equations is proposed. Models based on drift-kinetic equations are developed to describe the dispersion characteristics of low-frequency waves in 2D tokamaks. Drift trajectories of particles in axisymmetric tokamaks with circular and elliptical magnetic surfaces for arbitrary aspect ratios and elongations are analyzed. Product Description popup.authors Ihor Y. Harkusha Sergii V. Litovchenko Yuliia Y. Volkova Mykola O. Azarienkov Ivko Sergii Viktorovych Dmitro L. Grekov Ihor M. Sereda Denys S. Bondar Kanishсheva Mariia M. Mykhailo Y. Smortsov Yaroslav O. Hrechko Olena H. Nosova Vladyslav V. Vinnichenko popup.nrat_date 2026-03-09 Close