Analysis of a Multibeam Vircator Configuration for Efficiency Enhancement

Author

Sumathy, M. ; Chhotray, Sushant Kumar ; Kumar, Dwivedi Sanjeet ; Bhat, K.S. ; Kumar, Lalit

Author_Institution

Defence Res. Dev. Organ. (DRDO), Microwave Tube Res. & Dev. Centre (MTRDC), Bangalore

Volume

37

Issue

2

fYear

2009

Firstpage

293

Lastpage

297

Abstract

A new scheme of efficiency enhancement in virtual cathode oscillator (vircator) is proposed by introducing a multibeam concept. The phenomenon of radiofrequency interaction in both the single and multibeam configurations was analyzed using particle-in-cell modeling in Maxwellpsilas equations by the finite integration algorithm. Appreciable efficiency enhancement was observed for the multibeam configuration due to enhancement in the bunching process attributable to the formation of multiple virtual cathodes and multiple reflexing of electrons. Simulated results of (5 beams, 10 beams) multibeam configurations and single-beam configurations are compared for equal amounts of current, emitting area, and beam voltage in all three configurations.

Keywords

Maxwell equations; electron beams; particle beam bunching; plasma applications; plasma devices; plasma simulation; vircators; Maxwell equations; bunching process; finite integration algorithm; multibeam configuration RF interaction; multibeam vircator configuration; multiple virtual cathode formation; particle in cell modeling; single configuration RF interaction; vircator efficiency enhancement; virtual cathode oscillator; Efficiency enhancement; Maxwell’s equations by the finite integration algorithm; Maxwell´s equations by the finite integration algorithm; multibeam; particle-in-cell; virtual cathode oscillator (vircator);

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/TPS.2008.918798

Filename

4483786