Initial operation of a higher-power quasi-optical gyrotron

Author

Fliflet, Arne W. ; Hargreaves, Thomas A. ; Manheimer, Wallace M. ; Fischer, Richard P. ; Barsanti, Marc L.

Author_Institution

US Naval Res. Lab., Washington, DC, USA

Volume

18

Issue

3

fYear

1990

fDate

6/1/1990 12:00:00 AM

Firstpage

306

Lastpage

312

Abstract

Results from the initial operation of a high-power quasi-optical gyrotron based on the 90-kV, 50-A Varian VUW-8144 electron gun are reported. The output power and efficiency have been measured for a resonator mirror separation of 19.4 cm with a magnetic field of 4.95 T, corresponding to resonator output coupling of 1.9%, and for a resonator mirror separation of 21.4 cm with a magnetic field of 4.7 T, corresponding to a resonator output coupling of 3.1%. Operation was multimoded with 3-6 modes excited in the range of 125-130 GHz for the 4.95-T magnetic field. A peak efficiency of 15% at an output power of 161 kW was obtained for a gun voltage of 93 kV and a current of 12 A. A peak-output power of 364 kW at an efficiency of 10% was obtained at a voltage of 95.6 kV and 37.5 A

Keywords

electron guns; gyrotrons; 10 percent; 12 A; 125 to 130 GHz; 15 percent; 161 kW; 19.4 cm; 21.4 cm; 364 kW; 37.5 A; 4.7 T; 4.95 T; 50 A; 90 kV; 93 kV; 95.6 kV; Varian VUW-8144 electron gun; higher-power quasi-optical gyrotron; resonator mirror separation; Electron beams; Gyrotrons; Heating; Mirrors; Optical coupling; Power generation; Radio frequency; Superconducting magnets; Tuning; Voltage;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/27.55899

Filename

55899