Hrytsak R. Characteristics and parameters of plasma in gas-discharge short-wave emitters on the basis of water and freon molecules

The thesis is devoted to the study of characteristics and parameters of plasma in gas-discharge short-wave emitters based on water and freon molecules. The object of research is a plasma of capacitive and barrier discharges of nanosecond duration of UV and VUF lamps in mixtures of inert gases with water molecules and freon. Optical, electrical methods and computer simulation of plasma kinetics in discharges in various gas mixtures were used for the experimental study. VUV- and UV-radiation of capacitive discharge in Не-Н2О (D2O), Ar-Н2О (D2O) mixtures was studied for the first time. As a result of optimization of Не-Н2О (D2O) working mixtures, it was found that the use of "heavy" water is one and a half times more efficient than ordinary water vapor. Optical and electrical characteristics of the radiation of gas-discharge plasma of barrier discharge in VUV and UV ranges of spectrum in Не-D2О and Ar-D2O mixtures was studied. The study of the kinetics of formation of OD(A) radical in the discharge plasma showed that increasing the pressure of helium leads to decrease in the density of OD(A) due to the decrease in the electron temperature and reaction rapidity. The emission and electrical characteristics of the plasma of a barrier discharge on the Ar-CCl4 and Ar-Cr-CCl4 mixtures were examined. The main processes that determine the characteristics of plasma capacitive and barrier discharges in mixtures of inert gases with a water molecule and freon were established.