Effect of emission on subnanosecond breakdown in a gas diode at low pressure

被引：0
|
作者：
Baksht, E. Kh. [1 ]
Belomyttsev, S. Ya. [1 ]
Burachenko, A. G. [1 ,2 ]
Grishkov, A. A. [1 ]
Shklyaev, V. A. [1 ,3 ]
机构：
[1] Russian Acad Sci, Inst High Current Elect, 2-3 Akad Sky Ave, Tomsk 634055, Russia
[2] Tomsk State Univ, 36 Lenin Ave, Tomsk 634050, Russia
[3] Natl Res Tomsk Polytech Univ, Inst High Technol Phys, 30 Lenin Ave, Tomsk 634050, Russia
来源：
VACUUM | 2017年 / 143卷
关键词：
Subnanosecond breakdown; Runaway electrons; Numerical simulation; RUNAWAY ELECTRONS; DISCHARGES; BEAMS;
D O I：
10.1016/j.vacuum.2017.03.006
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The paper presents experimental and numerical research results on the operation of a gas diode at low pressure. A large scattering in runaway electron beam current (from 20 to 100 A) with regard to the average (similar to 50 A) is observed for a tubular cathode with a working edge radius of 30 mu m, nitrogen pressure of 40 mbar, and interelectrode gap of 6 mm. Numerical simulation data show that the low beam current (similar to 20 A) is due to early electron emission from the cathode (at the stage of low-voltage prepulse) in which the runaway electron beam is formed from the boundary of a plasma layer developed early in the breakdown. The high beam current (similar to 100 A) is due to delayed electron emission from the cathode, which increases the diode voltage and the runaway electron beam current. In the latter case, the runaway electron beam is formed directly at the cathode. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：424 / 427
页数：4
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