Фізичні явища в перехідному шарі на межі слабо іонізованої плазми

Abstract

Leleko Ya.F. Physical phenomena in the sheath at the boundary of weakly ionized plasma. – Manuscript. Thesis for a Candidate of Science degree in Physics and Mathematics, specialty 01.04.08 – Plasma Physics. – Institute of Plasma Physics of the National Science Centre "Kharkiv Institute of Physics and Technology" of the National Academy of Sciences of Ukraine. – V.N. Karazin Kharkiv National University of the Ministry of Education and Science of Ukraine. – Kharkiv, 2021. 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 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. It is shown that the electromagnetic wave reflected from the plasma is absorbed by electrons, which are slowed down in the sheath and reflected from the wall or from a potential barrier inside the sheath. The absorption coefficient is of the order of the fraction of the division of the thickness of the sheath by the depth of the skin layer, 𝑄~𝑣𝑇𝑒/c.