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 rO2 of oxygen, only a sharp current pulse was observed. The electronegativity in a discharge gap, which depends on rO2, was varied spatially and temporally. Even in rO2=1%, the maximum of electronegativity was reached to 53.1 at the phase of maximum value of discharge gap voltage. Despite of small rO2, dominant positive and negative charged species were changed from Xe2+ ions and electrons to O2+ and O- ions rapidly.