LANTHANUM HEXABORIDE HOLLOW-CATHODE FOR DENSE-PLASMA PRODUCTION

被引：58
|
作者：
GOEBEL, DM [1 ]
CROW, JT [1 ]
FORRESTER, AT [1 ]
机构：
[1] UNIV CALIF LOS ANGELES,DEPT PHYS,LOS ANGELES,CA 90024
来源：
REVIEW OF SCIENTIFIC INSTRUMENTS | 1978年 / 49卷 / 04期
关键词：
D O I：
10.1063/1.1135436
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
A hollow tube cathode using lanthanum hexaboride as the electron emitter has been designed and constructed. Tests in both argon and hydrogen indicate that this cathode is capable of producing over 800 A of electron current continuously, corresponding to over 25 A/cm2 from the LaB 6. The cathode has been operated for over 300 h and exposed to air more than 100 times with no deterioration in emission. Projected lifetime is in excess of 3500 h for the sintered LaB6 piece tested in this configuration. Construction details, performance characteristics, and discussions of space charge limits on emission are described.
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页码：469 / 472
页数：4
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