Experimental study of the energy characteristics of a longitudinal Glow Discharge

Abstract

Currently, a glow discharge is widely used not only as a gas-discharge light source or as an active medium for gas lasers, but also as an element of a plasma-chemical reactor, which allows for various chemical transformations in order to obtain new materials, modify and clean surfaces. Despite the fact that the structure and distribution of parameters in a classical glow discharge without gas flow and flat cylindrical electrodes are well known, to solve new technological problems, it is necessary to study glow discharge in discharge chambers with different electrode geometries and gas flow organization methods.The presence of a gas flow causes heterogeneity in the distribution of the parameters of a glow discharge, and can also affect the structure of its individual zones. Experimental study of the parameters of a longitudinal glow discharge will allow not only a better understanding of the physics of gas discharge, but also will make it possible to find ways to control these parameters, which is important for designing discharge chambers of various technological purposes. The article is devoted to a comprehensive experimental study of the distribution of potentials, field strength, current-voltage characteristics in a longitudinal glow discharge. The gas pressure P, its flow rate G, the discharge current strength I and its voltage U vary respectively in the ranges: P = (2–9) kPa, G = (0–0. 05) g / s, I = (30-80) mA, U = (1 - 2) kV.