高电子密度，常压空气辉光放电

Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop. Pub Date : 2002-06-30 DOI:10.1109/MODSYM.2002.1189433

F. Leipold, A. Mohamed, K. Schoenbach

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引用次数: 4

摘要

研究了常压空气辉光放电的脉冲电子加热效应。施加高压脉冲会使电子能量分布函数向高能量方向移动。这引起电离速率的暂时增加，从而导致电子密度的增加。在直流辉光放电中施加10ns脉冲后，电子密度从其直流值2 10/sup 13/ cm/sup -3/增加到2.8 10/sup 15/ cm/sup -3/。在给定的最小电子密度下维持高压等离子体所需的平均功率密度，与直流模式相比，在重复脉冲模式下放电时降低了。对于常压空气等离子体，平均电子密度分别为10/sup 13/ cm/sup -3/和10/sup 12/ cm/sup -3/时，平均功率密度为1.5 kw/cm/sup 3/和50 w/cm/sup 3/。这个值比维持一个具有相同基极电子密度的直流等离子体所需的值少三倍。

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High electron density, atmospheric pressure air glow discharges

The pulsed electron heating effect has been studied on an atmospheric pressure air glow discharge. Application of a high voltage pulse causes a shift in the electron energy distribution function to higher energies. This causes a temporary increase of the ionization rate and consequently an increase of the electron density. The electron density after a 10 ns pulse application to a direct current glow discharge increased from its DC value of 2 10/sup 13/ cm/sup -3/ to 2.8 10/sup 15/ cm/sup -3/. The average power density, required for sustaining the high pressure plasma with a given minimum electron density, was found to be lowered when the discharge was operated in a repetitive pulsed mode compared to a DC mode. For an atmospheric pressure air plasma, an average power density of 1.5 kw/cm/sup 3/ and 50 w/cm/sup 3/ is required for an average electron density of 10/sup 13/ cm/sup -3/ and 10/sup 12/ cm/sup -3/, respectively. This value is less by a factor of three than that required to sustain a DC plasma with the same base electron density.

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Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop.

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