Triple-beam monotron

Author

Barroso, Joaquim J. ; Kostov, Konstantin G.

Author_Institution

Associated Plasma Lab., Nat. Inst. for Space Res., Sao Jose de Campos, Brazil

Volume

30

Issue

3

fYear

2002

fDate

6/1/2002 12:00:00 AM

Firstpage

1169

Lastpage

1175

Abstract

Without requiring an externally applied magnetic field, the triple-beam TM₀₄₀, 6.7-GHz monotron devised in this paper includes a simple structure where the elementary functions of electron bunching and energy transfer to the RF field are performed in a single circular cylindrical cavity, which makes such a microwave generator a compact lightweight device. The cavity geometry (radius 8.42 cm, length 1.0 cm) and injection beam energy (10 keV) are determined on the basis of a one-dimensional (1-D) Lagrangian treatment neglecting space-charge forces. A 2 1/2-D particle-in-cell simulation is carried out for 0.4-cm-thick beams at currents in proportion to the beams´ cross section. This gives 560-kW output power at an overall tube efficiency of 14.8% in close agreement with 1-D theory.

Keywords

microwave tubes; particle beam bunching; simulation; 10 keV; 2 1/2-D particle-in-cell simulation; 560 kW; 6.7 GHz; cavity geometry; compact lightweight device; electron bunching; energy transfer; externally applied magnetic field; microwave generator; one-dimensional Lagrangian treatment; single circular cylindrical cavity; space-charge forces; triple-beam monotron; tube efficiency; Electrons; Energy exchange; Geometrical optics; Lagrangian functions; Magnetic fields; Microwave devices; Microwave generation; Particle beam injection; Particle beams; Radio frequency;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/TPS.2002.801621

Filename

1158353