The influence of O
2 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 Xe
2+ ions and electrons to O
2+ and O
- ions rapidly.
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