High-current vacuum arc appearance in nonhomogeneous axial magnetic field

被引：61
作者：
Chaly, AM [1 ]
Logatchev, AA
Zabello, KK
Shkol'nik, SM
机构：
[1] Tavrida Elect Ltd, Moscow 123298, Russia
[2] Russian Acad Sci, AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia
来源：
IEEE TRANSACTIONS ON PLASMA SCIENCE | 2003年 / 31卷 / 05期
关键词：
axial magnetic field (AMF) stabilization; cathode spots (CSs); high-current vacuum arcs (HCVAs); vacuum circuit breakers (VCBs);
D O I：
10.1109/TPS.2003.818414
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 distribution of the spots over the cathode of a high-current vacuum arc stabilized by an axial magnetic field (AMF) has been investigated. AMF configuration has been varied from conventional "bell-shaped" to "magnetic barrier," where a substantial AMF is created on the electrode edge and virtually vanishes in the center. The complex effect of the AMF configuration on the behavior of cathode spots has been satisfactorily explained based on the Steenbeck minimum principle. It has been shown that the "magnetic barrier" represents an optimum AMF configuration, providing even current distribution and relatively low and stable arc voltage.
引用
收藏
页码：884 / 889
页数：6
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