Title :
The design of the 28 GHz transmission line for the EBW heating system in the TJ-II stellarator
Author :
Fernández, Angela ; Doane, J. ; Kharchev, N. ; Cappa, A. ; Doncel, J. ; Moeller, C. ; Castejón, F. ; Sarksyan, K. ; Pardo, A.
Author_Institution :
CIEMAT Assoc. for Fusion, Madrid, Spain
fDate :
27 Sept.-1 Oct. 2004
Abstract :
A first harmonic electron Bernstein waves heating system is being designed to heat a dense plasma in the TJ-II stellarator. The design of the quasi-optical components and the oversized corrugated waveguide of the transmission line (28 GHz, 300 kW, 100 ms) is presented. After the gyrotron two elliptical mirrors and two polarisers conform the Gaussian beam to match into the oversized waveguide. The beam is launched into the plasma by a steerable internal mirror. The expected losses are around 9%.
Keywords :
gyrotrons; mirrors; optical design techniques; optical losses; optical polarisers; optical waveguides; plasma Bernstein waves; plasma filled waveguides; plasma heating; stellarators; transmission lines; 100 ms; 28 GHz; 300 kW; Gaussian beam; TJ-II stellarator; elliptical mirrors; gyrotron; harmonic electron Bernstein waves heating system; oversized corrugated waveguide; plasma heating; polarisers; quasi-optical component design; steerable internal mirror; transmission line; transmission line design; Electrons; Gyrotrons; Heating; Mirrors; Particle beams; Plasma density; Plasma waves; Polarization; Transmission lines; Waveguide components;
Conference_Titel :
Infrared and Millimeter Waves, 2004 and 12th International Conference on Terahertz Electronics, 2004. Conference Digest of the 2004 Joint 29th International Conference on
Print_ISBN :
0-7803-8490-3
DOI :
10.1109/ICIMW.2004.1422036
