Title :
Recent results of the step-tunable 105-140 GHz, 1MW gyrotron development at Forschungszentrum Karisruhe
Author :
Koppenburg, K. ; Arnold, A. ; Dammertz, G. ; Prinz, H.O. ; Thumm, M. ; Yang, X.
Author_Institution :
Assoc. EURATOM-FZK, Inst. fur Hochleistungsimpuls und Mikrowellentech., Eggenstein Leopoldshafen, Germany
Abstract :
A multifrequency step-tunable 1MW-gyrotron for controlling plasma instabilities in fusion tokamaks has been designed. It operates in the TE22.8 mode at 140 GHz and the TE17.6 mode at 105 GHz and 7 other modes in between. In the final stage for long pulse operation, this gyrotron should be equipped with an advanced synthetic diamond Brewster window and an optimized beam forming system. The last design results of the Brewster window and the quasi-optical mode converter are presented.
Keywords :
Tokamak devices; gyrotrons; microwave frequency convertors; plasma instability; plasma toroidal confinement; 1 MW; beam forming system; fusion tokamaks; long pulse operation; plasma instability control; quasi-optical mode converter; step-tunable gyrotron; synthetic diamond Brewster window; Chemical vapor deposition; Control systems; Gyrotrons; Loss measurement; Mirrors; Plasmas; Prototypes; Thickness measurement; Variable speed drives; Windows;
Conference_Titel :
Infrared and Millimeter Waves and 13th International Conference on Terahertz Electronics, 2005. IRMMW-THz 2005. The Joint 30th International Conference on
Print_ISBN :
0-7803-9348-1
DOI :
10.1109/ICIMW.2005.1572523
