Simulation Study on the Self-Sustained Oscillations in DC Driven Glow Discharges at Atmospheric Pressure Under Different Gas Gaps

In this paper, a one-dimensional plasma fluid model is employed to study the self- sustained oscillations in DC-driven helium glow discharges at atmospheric pressure under different gas gaps. Our simulation results indicate that a harmonic current oscillation with tiny amplitude always occur at the...

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Veröffentlicht in:Plasma science & technology 2015-06, Vol.17 (6), p.461-468, Article 461
1. Verfasser: 王晓菲 贺亚峰 刘富成
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Sprache:eng
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Zusammenfassung:In this paper, a one-dimensional plasma fluid model is employed to study the self- sustained oscillations in DC-driven helium glow discharges at atmospheric pressure under different gas gaps. Our simulation results indicate that a harmonic current oscillation with tiny amplitude always occur at the onset of instability and transits into a relaxation one as the conductivity of the semiconductor is decreased. It is found that the dynamics of the oscillations are dependent on the gas gaps. The discharge can only exhibit a simple oscillation with unique amplitude and frequency at smaller gas gaps (〈2 mm) while it can exhibit a more complex oscillation with several different amplitudes and frequencies at larger gas gaps (〉2 mm). The discharge modes in these current oscillations have also been analyzed.
ISSN:1009-0630
DOI:10.1088/1009-0630/17/6/05