Modeling of Dielectric Barrier Discharges in Xe/O₂ Gas Mixture

Influence of O₂ Gas Addition on Xe Barrier Discharge Properties

Abstract

The influence of O₂ gas addition (˜1%) on discharge properties of high-pressure Xe dielectric barrier discharges was investigated using one-dimensional fluid model. In calculated voltage-current characteristics, sharp and shallow current pulses were observed during a half cycle in pure xenon case. With an increase in the mixture ratio r_O2 of oxygen, only a sharp current pulse was observed. The electronegativity in a discharge gap, which depends on r_O2, was varied spatially and temporally. Even in r_O2=1%, the maximum of electronegativity was reached to 53.1 at the phase of maximum value of discharge gap voltage. Despite of small r_O2, dominant positive and negative charged species were changed from Xe₂⁺ ions and electrons to O₂⁺ and O^- ions rapidly.