Beam current density distribution of a vacuum arc ion source

被引：4
|
作者：
Nikolaev, AG [1 ]
Oks, EM
Zhang, XJ
Cheng, C
机构：
[1] Russian Acad Sci, Inst High Current Elect, Tomsk 634055, Russia
[2] State Univ Control Syst & Radioelect, Tomsk 634050, Russia
[3] Beijing Normal Univ, Inst Low Energy Nucl Phys, Beijing 100875, Peoples R China
来源：
REVIEW OF SCIENTIFIC INSTRUMENTS | 1998年 / 69卷 / 02期
关键词：
D O I：
10.1063/1.1148573
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
The distribution of the beam current density for metal ion vacuum are ion sources (MEVVA-type) lacks sufficient uniformity and its original form is similar to the Gaussian one. This is because of the plasma generation in a small space near the cathode spot. Further expansion of the plasma to the emission region does not improve this situation which poses a serious problem in creating a broad beam ion source. This article presents experimental results on the influence of various factors on the beam current density distribution. Experiments were carried out in Beijing with the MEVVA-IIA ion source. An additional magnetic field was applied to the are gap and a small metal grid covering the emission electrode was used. (C) 1998 American Institute of Physics.
引用
收藏
页码：807 / 809
页数：3
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