On potentials of gyrotron efficiency enhancement: measurements and simulations on a 4-mm gyrotron

Author

Louksha, Oleg I. ; Piosczyk, Bernhard ; Sominski, Gennadi G. ; Thumm, Manfred K. ; Samsonov, Dmitriy B.

Author_Institution

St. Petersburg Polytech.Univ.

Volume

34

Issue

3

fYear

2006

fDate

6/1/2006 12:00:00 AM

Firstpage

502

Lastpage

511

Abstract

In a 74.2-GHz 100-kW pulse gyrotron, the characteristics of parasitic low-frequency oscillations and their influence on electron energy spread have been determined. A method for suppressing parasitic oscillations by varying the magnetic field distribution in the beam compression region is studied. The results of measurements demonstrate the influence of azimuthal inhomogeneity of electron emission on the excitation of parasitic oscillations and on the gyrotron output parameters. Obtained data allows one to determine the ways of gyrotron efficiency enhancement by improved quality of the helical electron beam

Keywords

electron beams; electron emission; gyrotrons; microwave oscillators; 100 kW; 4 mm; 74.2 GHz; beam compression; electron emission; electron energy spread; gyrotron efficiency enhancement; helical electron beam; magnetic field distribution; parasitic low-frequency oscillations; Cathodes; Electron beams; Electron emission; Electron traps; Energy measurement; Gyrotrons; Magnetic field measurement; Pulse measurements; Radio frequency; Space charge; Emission uniformity; energy spread; gyrotron efficiency; space-charge oscillations;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/TPS.2006.875779

Filename

1643268