Research, development and application of oxide cathode

Author

Xianheng Liao ; Xiaoxia Wang ; Qinglan Zhao ; Mingfeng Meng ; Yun Li

Author_Institution

Inst. of Electron., Chinese Acad. of Sci., Beijing, China

fYear

2010

fDate

14-16 Oct. 2010

Firstpage

23

Lastpage

24

Abstract

The oxide cathode presented here is a reservoir dispenser oxide cathode based on the improved designs of the structure with a reservoir cell, the Ni sponge with the controlled porosity, and the emission materials in the cell. Its excess Ba comes from the reservoir emission material in the cell of the cathode. The excess Ba can easily diffuse to the surface of the cathode to emit electrons through the Ni sponge, which decreases the interface resistor and the coating resistor, so the cathode can provide higher emission current density.

Keywords

barium compounds; calcium compounds; cathodes; current density; electron emission; nickel; porosity; porous materials; resistors; strontium compounds; surface diffusion; Ni sponge; Ni-(BaSrCa)O; cathode cell; cathode surface; coating resistor; controlled porosity; diffusion; electron emission; emission current density; excess Ba; interface resistor; reservoir cell; reservoir dispenser oxide cathode; reservoir emission material;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Electron Sources Conference and Nanocarbon (IVESC), 2010 8th International

Conference_Location

Nanjing

Print_ISBN

978-1-4244-6645-0

Type

conf

DOI

10.1109/IVESC.2010.5644434

Filename

5644434