Development and test of a 500-kW, 8-GHz gyrotron

Author

Ives, Lawrence R. ; Jory, H.R. ; Neilson, V. ; Chodorow, M. ; Feinstein, Joseph ; LaRue, A.D. ; Zitelli, L. ; Martorana, Rosario

Author_Institution

Varian Associates, Inc., Palo Alto, CA, USA

Volume

40

Issue

7

fYear

1993

fDate

7/1/1993 12:00:00 AM

Firstpage

1316

Lastpage

1321

Abstract

An 8-GHz gyrotron that generates 500 kW and is capable of depressed collector operation is discussed. The output is extracted transversely from the circuit goes into two WR 137 rectangular waveguides through modified pillbox windows. The device will be used for lower hybrid heating of the FTU tokamak in Frascati, Italy, and has consequently been designed to produce over 400 kW when operated at a 4:1 VSWR. The current tube produces 1-s pulses every 10 min with the output power adjustable from approximately 150 to over 500 kW by changing only beam and mod anode voltage. The sensitivity to operating parameters is extremely low, making the tube easy to operate and unusually tolerant of variations in voltages and currents

Keywords

Tokamak devices; gyrotrons; plasma radiofrequency heating; rectangular waveguides; 500 kW; 8 GHz; FTU tokamak; VSWR; beam voltage; depressed collector operation; gyrotron; lower hybrid heating; mod anode voltage; operating parameters; pillbox windows; rectangular waveguides; Anodes; Circuit testing; Gyrotrons; Optical reflection; Plasma applications; Plasma sources; Power generation; Rectangular waveguides; Tokamaks; Voltage;

fLanguage

English

Journal_Title

Electron Devices, IEEE Transactions on

Publisher

ieee

ISSN

0018-9383

Type

jour

DOI

10.1109/16.216438

Filename

216438