Electron gun design for multi-beam pulsed amplifier

Author

Nehra, Ashok Kumar ; Gupta, Raj Kumar ; Panda, Purna Chandra ; Sharma, Sudhir Mohan ; Choyal, Yaduvendra ; Sharma, Rajendra Kumar

Author_Institution

Microwave Tubes Div., Central Electron. Eng. Res. Inst. (CEERI), Pilani, India

fYear

2012

fDate

24-26 April 2012

Firstpage

175

Lastpage

176

Abstract

This paper presents the design of an eight beam electron gun using OPERA 3D code for pulsed amplifier. The electron gun has to deliver total current 560 (70×8) mA at voltage 6 kV. Each beam has a perveance of 0.15 μP making a total gun perveance of 1.2 μP corresponding to a total beam power of more than 3 kW. The cathode radius is 13.5 mm and individual emitter radius is 1.55 mm having current density 0.92 A/cm². Focusing has been accomplished through solenoid. The beam pulsing can be accomplished through beam forming electrode relatively at lower negative potential at BFE with respect to cathode. This design has an added feature of cathode protection from ion bombardment with the application of additional ion barrier anode.

Keywords

current density; electrodes; electron guns; microwave amplifiers; BFE; OPERA 3D code; beam forming electrode; beam power; beam pulsing; cathode protection; cathode radius; current 560 mA; current density; eight beam electron gun design; electron gun design; emitter radius; gun perveance; ion barrier anode; multibeam pulsed amplifier; voltage 6 kV; Anodes; Cathodes; Electron beam applications; Focusing; Klystrons; Magnetic fields; Confined-flow focusing; Electron gun; Ion barrier anode; Multi-beam klystron;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Electronics Conference (IVEC), 2012 IEEE Thirteenth International

Conference_Location

Monterey, CA

Print_ISBN

978-1-4673-0188-6

Electronic_ISBN

978-1-4673-0187-9

Type

conf

DOI

10.1109/IVEC.2012.6262121

Filename

6262121