Design of sheet beam electron gun

Author

Raju, R.S. ; Barik, R.K. ; Banerjee, J. ; Bhomia, Princy

Author_Institution

Central Electron. Eng. Res. Inst., Pilani

fYear

2008

fDate

21-24 Nov. 2008

Firstpage

199

Lastpage

200

Abstract

Sheet beam is employed in THz devices as the beam offers an effective interaction with the RF signal. Sheet beam gun design is a challenge in achieving required flatness and laminarity over the length of RF-beam interaction. As per the published literature, sheet beam shape is obtained by using complicated shapes of cathode, BFE and anode. In the present work a planar gun geometry has been proposed. It was found that the shape of BFE has a critical bearing on the laminarity of beam. The BFE having a dumbbell shape and the anode having a rectangular slit produced good laminar beam. The work on single gun has been extended to obtain twin beams which are oppositely directed. The results are encouraging.

Keywords

electron guns; submillimetre wave tubes; terahertz wave devices; RF signal; RF-beam interaction; THz devices; beam forming electrode; beam laminarity; counter-streaming electron beam oscillator; planar gun geometry; rectangular slit; sheet beam electron gun; Anodes; Cathodes; Electrodes; Electron beams; Geometry; Microwave devices; Radio frequency; Shape; Solid modeling; Space charge; Beam Forming Electrode (BFE); Counter-Streaming Electron Bean Oscillator (CSEBO); Sheet Beam Electron Gun (SBEG); Tera Hertz (THz) Device;

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.2008.4763195

Filename

4763195