Investigation of FEAs applied in electron gun for microwave tubes

Author

Li, Xinghui ; Yang, Chongfeng ; Bai, Guodong ; Zhang, Fuquan ; Liao, Fujiang ; Feng, Jinjun ; Ding, Mingqing ; Du, Yinghua

Author_Institution

Beijing Vacuum Electron. Res. Inst., China

fYear

2002

fDate

17-19 Aug. 2002

Firstpage

110

Lastpage

113

Abstract

Our previous research showed that the main technical difficulties employing field emission arrays (FEAs) in electron gun of microwave power amplifiers could be attributed to the FEAs´ emission current density, emission stability and the defocus of the electron beam. The investigation of such factors are described in this paper. The current density of about several A/cm² and its stable working are studied and obtained. An electron gun with FEAs for microwave tubes is designed and simulated, which allows focusing of a 100 mA electron beam with a maximum 30° scattered angle.

Keywords

arrays; current density; electron beam focusing; electron field emission; electron guns; microwave power amplifiers; microwave tubes; stability; vacuum microelectronics; 100 mA; FEA electron gun; Spindt cathode; electron beam defocus; electrostatic field; emission current density; emission stability; field emission arrays; magnetostatic field; microwave power amplifiers; microwave tubes; Anodes; Current density; Electron beams; Electron emission; Electron tubes; Microwave devices; Scanning electron microscopy; Stability; Testing; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave and Millimeter Wave Technology, 2002. Proceedings. ICMMT 2002. 2002 3rd International Conference on

Print_ISBN

0-7803-7486-X

Type

conf

DOI

10.1109/ICMMT.2002.1187647

Filename

1187647