Premium
Fluid model of the positive column in argon‐oxygen direct current glow discharge
Author(s) -
Laca Marek,
Kaňka Adolf,
Schmiedt Lukáš,
Hrachová Věra,
Morávek Matěj Jan
Publication year - 2019
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.201800190
Subject(s) - argon , glow discharge , materials science , oxygen , atomic physics , electric field , current (fluid) , particle (ecology) , diffusion , glass tube , direct current , gas filled tube , plasma , tube (container) , thermodynamics , physics , chemistry , composite material , power (physics) , oceanography , quantum mechanics , geology
The positive column of argon‐oxygen direct current (DC) glow discharge was investigated using a fluid model at pressures of around 410 Pa and discharge currents from 10 to 40 mA. The model was used to study the influence of an oxygen admixture on the properties of argon discharge. The simulated intensity of the electric field strength was compared with measured values at 5% and 100% of oxygen concentration. The one‐dimensional model in a cylindrical tube is based on the drift‐diffusion approximation of particle flux and the mean‐electron‐energy approximation is used to describe the electron interaction. The model takes into account the radial profile of particle concentration, the neutral gas kinetic temperature profile, and interactions with the wall in the cylindrical glass discharge tube. It was shown that 2% of the oxygen admixture causes a significant increase in longitudinal electric field strength and gas heating.