The Field Emission Array Cathode and Its Application in Traveling Wave Tubes

Author

Fu Jiang Liao ; Li, Xinghui ; Feng, Jinjun ; Bai, Guodong ; Ding, Mingqing ; Zhang, Fuquan ; Cai, Jun

Author_Institution

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

fYear

2006

fDate

38899

Firstpage

155

Lastpage

156

Abstract

This paper describes the field emission array (FEA) cathode manufacturing to obtain high current density, the electron gun structure, the fabrication process and the test results of a FEA-gun. A three-dimensional electromagnetic simulation program MAFIA was used to design the FEA electron gun, and the electron beam trajectory was simulated under initial condition of emitted electrons with half angle of 30 degrees. In fabrication of the electron gun, many welding processes were used. The fabricated electron gun was tested in a vacuum chamber with a pressure of 5times10^-6 Pa. The field emission array cathode is used as an electron source in a micro-traveling wave tube (TWT)

Keywords

cathodes; electron guns; field emitter arrays; travelling wave tubes; welding; 5E-6 Pa; FEA electron gun design; current density; electron beam trajectory; electron gun structure; electron source; field emission array cathode; microTWT; three-dimensional electromagnetic simulation program MAFIA; traveling wave tube; vacuum testing; welding; Cathodes; Current density; Electron beams; Electron emission; Fabrication; Field emitter arrays; Manufacturing processes; Pulp manufacturing; Testing; Welding;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Nanoelectronics Conference, 2006 and the 2006 50th International Field Emission Symposium., IVNC/IFES 2006. Technical Digest. 19th International

Conference_Location

Guilin

Print_ISBN

1-4244-0401-0

Type

conf

DOI

10.1109/IVNC.2006.335405

Filename

4134507