Application of dynamic displacement current for diagnostics of subnanosecond breakdowns in an inhomogeneous electric field

被引：53

作者：

Shao, Tao ^{[1
,2
]}

Tarasenko, Victor F. ^{[3
]}

Zhang, Cheng ^{[1
,2
]}

Burachenko, Alexandr G. ^{[3
]}

Rybka, Dmitry V. ^{[3
]}

Kostyrya, Igor' D. ^{[3
]}

Lomaev, Mikhail I. ^{[3
]}

Baksht, Evgeni Kh. ^{[3
]}

Yan, Ping ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Inst Elect Engn, Beijing 100190, Peoples R China

[2] Chinese Acad Sci, Key Lab Power Elect & Elect Drive, Beijing 100190, Peoples R China

[3] Russian Acad Sci, Inst High Current Elect, Tomsk 634055, Russia

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2013年 / 84卷 / 05期

基金：

中国国家自然科学基金;

关键词：

ATMOSPHERIC-PRESSURE AIR; VOLUME DISCHARGE; PULSE; GENERATION;

D O I：

10.1063/1.4807154

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The breakdown of different air gaps at high overvoltages in an inhomogeneous electric field was investigated with a time resolution of up to 100 ps. Dynamic displacement current was used for diagnostics of ionization processes between the ionization wave front and a plane anode. It is demonstrated that during the generation of a supershort avalanche electron beam (SAEB) with amplitudes of similar to 10 A and more, conductivity in the air gaps at the breakdown stage is ensured by the ionization wave, whose front propagates from the electrode of small curvature radius, and by the dynamic displacement current between the ionization wave front and the plane electrode. The amplitude of the dynamic displacement current measured by a current shunt is 100 times greater than the SAEB. It is shown that with small gaps and with a large cathode diameter, the amplitude of the dynamic displacement current during a subnanosecond rise time of applied pulse voltage can be higher than 4 kA. (C) 2013 AIP Publishing LLC.

引用

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