A review of oxide cathode research in IECAS

Author

Liao, X.H. ; Wang, X.X. ; Zhao, Q.L. ; Meng, M.F.

Author_Institution

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

fYear

2004

fDate

6-10 Sept. 2004

Firstpage

107

Abstract

Summary form only given. Oxide cathode is invented, developed and applied in vacuum electronic devices over 100 years. This paper presents a review for the research results of the emission mechanisms, characteristics and applications of the oxide cathode in IECAS, which includes a dynamical surface emission center theory, a high reliable and long lifetime oxide cathode, as well as a low temperature´ and large emission current oxide cathode. The characteristics of these cathodes, such as, DC and PC emission, evaporations, resistance to poisoning and lifetime, are discussed. These cathodes have been wildly applied in communication secondary planet TWT, high power wide pulse klystrons and high operating ratio TWT, which shows that good characteristics for the emission and lifetime can been reached.

Keywords

current density; klystrons; oxide coated cathodes; travelling wave tubes; vacuum microelectronics; DC emission; IECAS; PC emission; dynamical surface emission center theory; emission mechanisms; evaporations; high power wide pulse klystrons; large current density; oxide cathode; poisoning resistance; travelling wave tubes; vacuum electronic devices; Cathodes; Current density; Klystrons; Planets; Reliability theory; Surface resistance; Temperature;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Electron Sources Conference, 2004. Proceedings. IVESC 2004. The 5th International

Print_ISBN

0-7803-8437-7

Type

conf

DOI

10.1109/IVESC.2004.1414151

Filename

1414151