A new broad-beam alkali ion source for use in ultra high vacuum

被引：3
|
作者：
Terzic, I [1 ]
Tosic, MM [1 ]
Elazar, J [1 ]
机构：
[1] UNIV BELGRADE, FAC ELECT ENGN, YU-11000 BELGRADE, YUGOSLAVIA
来源：
MEASUREMENT SCIENCE AND TECHNOLOGY | 1996年 / 7卷 / 06期
关键词：
D O I：
10.1088/0957-0233/7/6/014
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A new broad-beam ion source of alkali (K+) ions for use in ultra high vacuum was designed, built and tested. The basic principles used have advantages over gas-fed broad-beam ion sources, because there is no need for differential pumping, and because an intrinsically pure ion beam obviates the necessity for charge-to-mass analysis. The source is based on the effect of thermionic emission of K+ ions from solid potassium aluminosilicate (K2O . Al2O3 . 2SiO(2)) emitter. An ion beam current of 0.4 mA has been achieved at an extraction voltage of 3.5 kV with 1.5 cm beam diameter. The degassed broad-beam ion source in operation does not appreciably influence the background pressure in the ultra high vacuum system.
引用
收藏
页码：944 / 948
页数：5
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