DIRECT EXTRACTION OF A NA- BEAM FROM A SODIUM PLASMA

被引：7

作者：

SASAO, M

YAMAOKA, H

WADA, M

FUJITA, J

机构：

[1] INST PHYS & CHEM RES,WAKO,SAITAMA 351,JAPAN

[2] DOSHISHA UNIV,DEPT ELECTR,KYOTO 602,JAPAN

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 1991年 / 55卷 / 1-4期

关键词：

D O I：

10.1016/0168-583X(91)96185-N

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Negative sodium ions (Na-) were extracted from a small multi-cusp ion source. A steady state sodium plasma was produced by primary electrons in a sodium gas evaporating from a metal sample placed in the discharge chamber. The Na- current density of 1.5-mu-A/cm2 was obtained from a single aperture of 1.5 mm diameter at relatively low discharge power of about 0.4 W and filament power of 50 W. Extraction characteristics were studied by changing the plasma electrode bias. The extracted Na- current showed a dependence on the bias voltage similar to that of H- or Li- volume production.

引用

页码：318 / 322

页数：5

共 6 条

[1] VOLUME GENERATION OF H- IONS IN PLASMAS [J].