Ol'shans'kyj V. Numerical modelling of current and parametric instabilities of plasma in ion cyclotron and lower hybrid frequency range

The dissertation is devoted to research of turbulent heating dynamics of collisionless plasma under current and parametric instabilities development in the lower hybrid and ion cyclotron frequency range by means of macroparticle technique. 2D-modelling of current instability in plasma with two ion species moving across the strong magnetic field is performed. The saturation mechanism of the instabilities and efficiency of plasma heating depending on plasma parameters are studied. 2D-modelling of lower hybrid and ion cyclotron parametric instabilities of plasma with two ion species is performed. The case of the strong pumping field is considered, when the amplitude of the velocity oscillations of ions of different species exceeds ion thermal velocity but lesser than electron one. 2D3V-model is developed on the base of the implicit scheme of integration of the equations of macroparticles motion and the numerical code is elaborated for the electron-ion parametric turbulence investigation. The nonlinear st age of the electron-ion parametric turbulence of plasma with one or two ion species is studied with pumping field frequency order of ion cyclotron one. It is shown that parametric turbulence development leads to electrons and ions heating in dynamic chaos regime of particles motion and to decorrelation of selfconsistent electric field.