Prebreakdown process of a negative nanosecond pulsed discharge in supercritical carbon dioxide
Prebreakdown process of a negative nanosecond pulsed discharge in supercritical carbon dioxide
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DOI：
10.7567/apex.7.026201
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发表时间：
2014-02
影响因子：
2.3
通讯作者：
T. Furusato;H. Tanoue;S. Katsuki;M. Hara;H. Akiyama
中科院分区：
文献类型：
--
作者：
T. Furusato;H. Tanoue;S. Katsuki;M. Hara;H. Akiyama
研究了负纳秒脉冲电压作用下超临界CO2气体在100 μm间隙中的预击穿过程。用阴影法观察到一种类似于锯齿状的负流光。虽然电流在上升沿的中间流动，但是当施加超过28kV的峰值电压时，在下降沿突然出现反向放电电流。通过对反向放电电流的积分计算，估计电子倍增约为108。这些结果表明，负流注的增长步骤和灌木流注的内部被认为是由高压气体。
The prebreakdown process in a 100 µm gap in supercritical carbon dioxide was investigated under negative nanosecond pulsed voltage. A bushlike negative streamer was observed by the shadowgraph method. Although currents flowed in the middle of the rising edge, a back discharge current suddenly appeared at the falling edge when a peak voltage exceeding 28 kV was applied. Electron multiplication was estimated to be approximately 108 by integrated calculation of the back discharge current. These results suggest that a negative streamer grows by steps and the inside of the bush streamer is considered to consist of a high-pressure gas.