THE TEMPORAL DEVELOPMENT OF HOLLOW-CATHODE DISCHARGES

被引:25
作者
NGO, MT
SCHOENBACH, KH
GERDIN, GA
LEE, JH
机构
[1] OLD DOMINION UNIV,DEPT ELECT & COMP ENGN,NORFOLK,VA 23529
[2] NASA,LANGLEY RES CTR,HAMPTON,VA 23665
基金
美国国家航空航天局;
关键词
17;
D O I
10.1109/27.55942
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 temporal development of hollow cathode discharges was studied by means of electrical and optical diagnostic techniques. The results indicate that the discharge develops in two stages. The initial breakdown occurs along the longest straight path of the system; i.e., from the anode to the bottom of the cathode hole. This predis-charge is confined to a narrow filament along the axis and carries a current of up to hundreds of mA. The resulting distortion of the electric field in the cathode hole is assumed to cause a radial breakdown from the filamentary plasma on the axis to the edge of the cathode hole. After this second breakdown, an increase in current by more than three orders of magnitude is observed. Measurements with axial magnetic fields support the two-stage model. © 1990 IEEE
引用
收藏
页码:669 / 676
页数:8
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