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WANG Xiaofei (王晓菲), HE Yafeng (贺亚峰), LIU Fucheng (刘富成). Simulation Study on the Self-Sustained Oscillations in DC Driven Glow Discharges at Atmospheric Pressure Under Different Gas Gaps[J]. Plasma Science and Technology, 2015, 17(6): 461-468. DOI: 10.1088/1009-0630/17/6/05
Citation: WANG Xiaofei (王晓菲), HE Yafeng (贺亚峰), LIU Fucheng (刘富成). Simulation Study on the Self-Sustained Oscillations in DC Driven Glow Discharges at Atmospheric Pressure Under Different Gas Gaps[J]. Plasma Science and Technology, 2015, 17(6): 461-468. DOI: 10.1088/1009-0630/17/6/05

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 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.
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