Prebreakdown process of a negative nanosecond pulsed discharge in supercritical carbon dioxide

被引：9
|
作者：
Furusato, Tomohiro [1 ]
Tanoue, Hiroyuki [1 ]
Katsuki, Sunao [1 ,2 ]
Hara, Masanori [3 ]
Akiyama, Hidenori [1 ,2 ]
机构：
[1] Kumamoto Univ, Grad Sch Sci & Technol, Kumamoto 8608555, Japan
[2] Kumamoto Univ, Inst Pulsed Power Sci, Kumamoto 8608555, Japan
[3] Kyushu Elect Power Co Inc, Res Inst, Fukuoka 8158520, Japan
来源：
APPLIED PHYSICS EXPRESS | 2014年 / 7卷 / 02期
基金：
日本学术振兴会;
关键词：
BREAKDOWN;
D O I：
10.7567/APEX.7.026201
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The prebreakdown process in a 100 mu m 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 10(8) 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. (C) 2014 The Japan Society of Applied Physics
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页数：3
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