Title :
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.
fDate :
6/1/2006 12:00:00 AM
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;
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2006.875779
