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

fYear

2004

fDate

27 Sept.-1 Oct. 2004

Firstpage

225

Lastpage

226

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ICIMW.2004.1422036

Filename

1422036