Title :
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
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;
Conference_Titel :
Microwave and Millimeter Wave Technology, 2002. Proceedings. ICMMT 2002. 2002 3rd International Conference on
Print_ISBN :
0-7803-7486-X
DOI :
10.1109/ICMMT.2002.1187647
