Rapid current transition in a crossed-field diode

被引:11
作者
Verboncoeur, JP
Birdsall, CK
机构
[1] Electronics Research Laboratory, University of California, Berkeley
关键词
D O I
10.1063/1.871776
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
The transmitted current in a crossed-field gap has been characterized analytically by a number of authors. Using a one dimensional PIC simulation, we explore the behavior of the crossed-field diode at B=B-Hull. For mono-energetic (cold) emission, a rapid reduction of transmitted current is observed when the injected current exceeds the critical current by just 1%. The addition of a small electron temperature normal to the cathode eliminates the transition, even for kT/V similar to 10(-5) (V=10 kV, gap = 1 cm, B=337 G, J=1.69 A/cm(2)), while an isotropic velocity distribution accelerates the transition. (C) 1996 American Institute of Physics.
引用
收藏
页码:712 / 713
页数:2
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