A high power 140 GHz quasioptical gyro-TWT

Author

Sirigiri, Jagadishwar R. ; Shapiro, Michael A. ; Temkin, Richard J.

Author_Institution

Plasma Sci. & Fusion Center, MIT, Cambridge, MA, USA

fYear

2003

fDate

5-5 June 2003

Firstpage

257

Abstract

Summary form only given, as follows. Summary form only given. The experimental results from a wide-band high power 140 GHz quasioptical gyro-TWT will be presented. The gyroTWT amplifier is designed to generate 100 kW at 140 GHz with 38 dB gain and 3% saturated bandwidth. The interaction structure is a highly overmoded quasioptical open waveguide namely, a confocal waveguide which has the capability of up to 100 kW CW operation in the W-band (94 GHz) when built to industrial standards. The other novel features of the experiment include a quasioptical diffraction sever with a high average power capability. The latest experimental results in microsecond pulsed operation include peak power of 30 kW for a 68 kV, 6A beam and 10 kW of power over a 2 GHz bandwidth in unsaturated operation.

Keywords

gyrotrons; travelling wave tubes; 100 kW; 140 GHz; 2 GHz; 38 dB; 6 A; 68 kV; 94 GHz; CW operation; confocal waveguide; overmoded quasioptical open waveguide; quasioptical diffraction sever; unsaturated operation; wide-band high power quasioptical gyro-TWT; Electron beams; Frequency; Gain; Gyrotrons; Magnetic fields; Magnetic resonance; Permanent magnets; Plasmas; Pulse measurements; Saturation magnetization;

fLanguage

English

Publisher

ieee

Conference_Titel

Plasma Science, 2003. ICOPS 2003. IEEE Conference Record - Abstracts. The 30th International Conference on

Conference_Location

Jeju, South Korea

ISSN

0730-9244

Print_ISBN

0-7803-7911-X

Type

conf

DOI

10.1109/PLASMA.2003.1228785

Filename

1228785