HIGH POWER TRANSMISSION IN LH WAVE COUPLERS
The gas filling pressure used in TOKAMAK being in the range of few 10**-4 torr, the results presented in IV-2 are encouraging with regard to RF transmission capability in grill launchers. No strong intrinsic limit of HF power transmission has been found: gas filling and high magnetic fields do not seem to drastically damage the RF power densities useful for lower Hybrid Heating Studies. Argon glow discharge conditioning proves to be a remarkable tool for high RF power density handling within TOKAMAK surroundings. This procedure allows a good treatment of surface effects which limit 2-RF power transmission (e.g. multipactor). Power densities of up to 3.4 kW/cm**2 have been currently reached on all of PETULA's grill launchers. Such conditioning methods must be improved in order to be applied on Tore Supra L.H. wave couplers.
Bibliographic Reference: 4TH INTERNATIONAL SYMPOSIUM ON HEATING IN TOROIDAL PLASMAS, ROMA (ITALY), MARCH 21-28, 1984 VOL. II, PP. 1277-1285 1478 P., VOL. I AND VOL. II, 1984 WRITE TO MONOTYPIA FRANCHI, ST. LUCIA - VIALE UMBRIA NO. 28, 06012 CITTA DI CASTELLO, PERUGIA (ITALY), PRI
Record Number: 1989124031600 / Last updated on: 1987-01-01
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