Leleko Y. Physical phenomena in the sheath at the boundary of weakly ionized plasma

The dissertation is devoted to the research of the influence of the sheath of finite thickness on the boundary of weakly ionized nonisothermal plasma on the physical phenomena occurring in this sheath between the plasma and the wall. The damping of an electromagnetic wave at its oblique incidence from the dielectric to the surface adjacent to the plasma and the surface electromagnetic wave due to the absorption of the wave energy by plasma electrons interacting with the normal to the interface surface component of the electric field of this wave in the sheath is determined. The dependences of the complex frequency of the ion-sound oscillations as a function of the wave vector in the local approximation for inhomogeneous equilibrium plasma parameters are found. The influence of the probe rectified potential of high-frequency waves radiated by the frame-type antenna, the rectified antenna potential, caused by high-frequency voltage and Miller's ponderomotor force are calculated. Using the original numerical algorithm developed in the dissertation, assessments of the effect of ion viscosity in the ion motion equation were performed and plasma parameter distributions were obtained taking into account ion viscosity in the quasi-neutral approximation.