Effects of self-erasing discharges on the uniformity of the dielectric barrier discharge
Effects of self-erasing discharges on the uniformity of the dielectric barrier discharge
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DOI：
10.1088/0022-3727/38/12/010
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发表时间：
2005-06
期刊：
影响因子：
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通讯作者：
T. Somekawa;T. Shirafuji;O. Sakai;K. Tachibana;K. Matsunaga
中科院分区：
文献类型：
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作者：
T. Somekawa;T. Shirafuji;O. Sakai;K. Tachibana;K. Matsunaga
采用一种新型高压脉冲电源对Ne、N2和N2/O2气体的大气压放电进行了研究。观察到三种特征类型的放电模式：（1）在Ne气体中用眼睛和高速相机都看到的扩散辉光放电;（2）在N2气体中用眼睛观察到的扩散辉光状放电，但用高速相机看到的是模糊的自发放电;以及（3）在N2/O2气体混合物中用眼睛和高速相机都看到的清晰自发放电。电流和电压波形的特性表明，在第一脉冲电压之后的具有相反极性的第二电压的存在对于具有扩散辉光状放电是重要的。这表明，消除记忆效应的非均匀分布的电荷在表面上是重要的，因为非均匀性触发了一个正反馈的电流收缩的点具有较高的电荷密度，并导致在放电的抑制，以获得扩散模式。
Atmospheric pressure discharges in Ne, N2 and N2/O2 gases have been investigated with a novel high-voltage pulse power supply. Three characteristic types of discharge modes were observed: (1) diffuse glow discharge seen in Ne gas both with the eye and high-speed camera; (2) diffuse glow-like discharge in N2 gas observed with the eye, but seen as a vague filamentary discharge with a high-speed camera; and (3) clear filamentary discharge in N2/O2 gas mixture both with the eye and high-speed camera. Characteristics in the current and voltage waveforms revealed that the existence of the second voltage with opposite polarity following the first impulse voltage was important to have a diffuse glow-like discharge. This suggests that elimination of the memory effect by non-uniformly distributed charges on the surface is important for obtaining the diffuse mode because the non-uniformity triggers a positive feedback to the current constriction at the points with higher charge density, and results in filamentation of the discharge.