Recent Developments in Scandia-Doped Dispenser Cathodes

Author

Li, Ji ; Wang, Hui ; Gao, Yujuan ; Yuan, Haiqing ; Pan, Kexin ; Zhang, Ke ; Chen, Qilue ; Yan, Tiechang ; Liao, Fujiang ; Wang, Jinshu ; Wang, Yiman ; Liu, Wei

Author_Institution

Cathode Electron. Lab., Beijing Vacuum Electron. Res. Inst.

fYear

0

fDate

0-0 0

Firstpage

51

Lastpage

52

Abstract

We measured SDDCs emission property and made comparison with impregnated scandate (I-Sc). A reasonable explanation on abnormal Schottky effect of SDDCs is given. The authors proposed a "semiconductor-monolayer superposition" model to explain emission mechanism of all kinds of thermionic cathodes, including oxide cathodes, M-type cathodes and scandate cathodes. Finally, from the view of engineering application, some improvement ideas and suggestions to future work of SDDCs are given

Keywords

Schottky effect; electron emission; thermionic cathodes; M-type cathodes; abnormal Schottky effect; emission mechanism; emission property; impregnated scandate; oxide cathodes; scandate cathodes; scandia-doped dispenser cathodes; semiconductor-monolayer superposition model; thermionic cathodes; Cathodes; Current density; Laboratories; Machining; Materials science and technology; Power capacitors; Rough surfaces; Space charge; Surface roughness; Temperature; Dispenser cathodes; Nonuniform emission; Scandate cathodes; Semiconductor - monolayer superposition;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Electronics Conference, 2006 held Jointly with 2006 IEEE International Vacuum Electron Sources., IEEE International

Conference_Location

Monterey, CA

Print_ISBN

1-4244-0108-9

Type

conf

DOI

10.1109/IVELEC.2006.1666179

Filename

1666179