Development of big-size impregnated scandate dispenser cathode

Author

Hui Wang ; Zhiqiang Yu ; Wensheng Shao ; Ji Li ; Yan Men ; Anmin Yang ; Liansheng Xia ; Jinshui Shi

Author_Institution

Beijing Vacuum Electron. Res. Inst., Beijing, China

fYear

2014

fDate

22-24 April 2014

Firstpage

61

Lastpage

62

Abstract

The big-size (Φ100, 135, and 155mm) scandate dispenser cathodes have been fabricated in BVERI and tested in injector system of LIA. The results show that impregnated scandate cathodes which have better emission performance can be applied as the electron source in LIA and satisfied the requirement of the LIA. The pulse current of both Φ135 and Φ155mm cathode assemblies is more than 2000A and the current density is more than 14 A/cm². At the same time, the cathode has good emission stability and repetition with respect to single pulse and three-pulse modes.

Keywords

cathodes; current density; electron field emission; BVERI; LIA injector system; big-size impregnated scandate dispenser cathode; current density; electron source; emission performance; emission stability; single pulse modes; three-pulse modes; Assembly; Cathodes; Current density; Electron sources; Heating; Temperature distribution; Thermal stability; activation; emission; heater; outgassing; scandate cathode;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Electronics Conference, IEEE International

Conference_Location

Monterey, CA

Type

conf

DOI

10.1109/IVEC.2014.6857490

Filename

6857490