Design of low current density elliptical sheet beam gun

Author

Ningfeng Bai ; Meng Shen ; Xiaohan Sun ; Fujiang Liao ; Jinjun Feng ; Tiechang Yan

Author_Institution

Res. Center for Electron. Device & Syst. Reliability, Southeast Univ., Nanjing, China

fYear

2015

Firstpage

1

Lastpage

2

Abstract

Low current density sheet beam electron gun is very useful for compact planar travelling wave tube (TWT). In this paper, a planner low current density elliptical sheet beam electron gun is presented, and the structure parameters of this electron gun are optimized to get low current density for the application of planar TWTs. The gun has an elliptical cathode, critical bearing on the laminarity of beam. With optimizing the structure, cathode, focusing and anode, parameters, the gun is achieved a sheet beam of 110A/cm² at an operating beam voltage of 9.5kv with the final beam cross-section at 800μm × 60μm. The simulation results show this gun can produce a good focused laminar sheet beam.

Keywords

cathodes; current density; electron guns; travelling wave tubes; anode; beam laminarity; compact planar travelling wave tube; critical bearing; elliptical cathode; elliptical sheet beam electron gun; planar TWT; planner low current density; structure parameters; voltage 9.5 kV; anode; cathode; electron gun; low current density; sheet beam;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Electronics Conference (IVEC), 2015 IEEE International

Print_ISBN

978-1-4799-7109-1

Type

conf

DOI

10.1109/IVEC.2015.7223999

Filename

7223999