1 MW, 140 GHz, CW gyrotron for Wendelstein 7-X

Author

Dammertz, G. ; Alberti, S. ; Arnold, A. ; Borie, E. ; Erckmann, V. ; Forster, W. ; Gantenbein, G. ; Garin, P. ; Giguet, E. ; Illy, S. ; Kasparek, W. ; Laqua, H. ; Le Cloarec, G. ; Le Goff, Y. ; Leonhardt, W. ; Magne, R. ; Michel, G. ; Muller, G. ; Ploscyz

Author_Institution

Inst. fur Hochleistungsimpuls- und Mikrowellentech., Forschungszentrum Karlsruhe, Germany

fYear

2000

fDate

12-15 Sept. 2000

Firstpage

15

Lastpage

16

Abstract

A continuous wave, 1 MW, 140 GHz gyrotron oscillator has been designed and constructed as a joint collaboration between FZK Karlsruhe, CRPP Lausanne, IPF Stuttgart, CEA Cadarache and TTE Velizy for the 10 MW ECRH system of the new stellarator plasma physics experiment, Wendelstein 7-X, at IPP Greifswald, Germany. The tube is equipped with a diode MIG gun, an improved beam tunnel, a high-mode purity low-ohmic loss cavity, an optimized nonlinear up-taper, a highly efficient internal quasioptical mode converter, a single stage depressed collector for energy recovery and a large-aperture, edge-cooled, single disk CVD-diamond window and will be operated in the TE/sub 28.8/ mode. The gyrotron design and the teststand at the Forschungszentrum Karlsruhe are described; first experimental results for short pulse operation are presented.

Keywords

cavity resonators; gyrotrons; millimetre wave tubes; plasma radiofrequency heating; stellarators; 1 MW; 10 MW; 140 GHz; C; CW gyrotron oscillator; ECRH system; EHF; MM-wave tube; TE/sub 28.8/ mode operation; Wendelstein 7-X; continuous wave gyrotron; diode MIG gun; edge-cooled diamond window; gyrotron design; gyrotron teststand; high-mode purity cavity; improved beam tunnel; internal quasioptical mode converter; large-aperture window; low-ohmic loss cavity; megawatt gyrotron; optimized nonlinear up-taper; short pulse operation; single disk CVD-diamond window; single stage depressed collector; stellarator plasma physics experiment; Cathodes; Diodes; Gyrotrons; Magnetic fields; Optical resonators; Particle beams; Plasma waves; Superconducting coils; Superconducting magnets; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared and Millimeter Waves, 2000. Conference Digest. 2000 25th International Conference on

Conference_Location

Beijing, China

Print_ISBN

0-7803-6513-5

Type

conf

DOI

10.1109/ICIMW.2000.892917

Filename

892917