Dual anode electron gun for Ka-Band helix TWT

Author

Choudhury, Amitavo Roy ; Sharma, Ratnesh K. ; Sharma, S.M. ; Arya, S. ; Bera, Aniket ; Srivastava, Vishnu

Author_Institution

MWT Div., Central Electron. Eng. & Res. Inst., Pilani

fYear

2008

fDate

21-24 Nov. 2008

Firstpage

192

Lastpage

195

Abstract

A dual anode convergent electron gun of perveance 0.14 mup has been designed for Ka-Band helix Traveling Wave Tube (TWT) which would ultimately have application in satellite communications. Gun has been designed using codes EGUN, TRAK & OMNITRAK. Pierce type electron gun with isolated beam forming electrode (BFE) & M-Type dispenser cathode with 3.1 mm button diameter has been opted. It consists of two isolated anodes to meet the requirement of long life & high reliability. Initially, in cathode selection, life considerations are ignored, the gun is designed with available cathode. Periodic Permanent (PPM) focusing has been designed using Sm₂Co₁₇ high intensity magnet in order to reduce the size & weight of the overall TWT. Confined flow beam focusing has been adopted. A compact small size electron gun assembly has been designed using ceramic insulator & suitable support structure. High voltage analysis has been carried out using code ESTAT. This paper presents the approach for overall design of gun assembly with dual anode.

Keywords

cathodes; ceramic insulators; electron guns; microwave tubes; millimetre wave tubes; travelling wave tubes; EGUN; ESTAT; Ka-Band helix TWT; M-type dispenser cathode; OMNITRAK; Sm₂Co₁₇; TRAK; beam forming electrode; ceramic insulator; confined flow beam focusing; dual anode electron gun; gun assembly; high voltage analysis; periodic permanent focusing; pierce type electron gun; satellite communication; size 3.1 mm; traveling wave tube; Anodes; Assembly; Cathodes; Ceramics; Electrodes; Electron beams; Electron tubes; Insulation; Magnetic confinement; Satellite communication; Dual anode electron gun; Helix space TWT; High voltage analysis; PPM focusing; sensitivity analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Recent Advances in Microwave Theory and Applications, 2008. MICROWAVE 2008. International Conference on

Conference_Location

Jaipur

Print_ISBN

978-1-4244-2690-4

Electronic_ISBN

978-1-4244-2691-1

Type

conf

DOI

10.1109/AMTA.2008.4763174

Filename

4763174