1982•Unpublished venueRequires access
Electron cyclotron heating in the FT-1 tokamak
Yuriy Baranov, D. G. Bulyginskii, V.E. Golant, В. И. Иванов, M. M. Larionov, L. S. Levin, A.I. Tokunov, V. I. Fedorov, N.V. Shustova
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Abstract
Experiments on electron cyclotron heating of the plasma in the FT-1 tokamak have been carried out with an 80-kW, 29-GHz microwave source and with antennas capable of injecting the microwave energy from the outer and inner sides of the torus. This source power level is comparable to the ohmic-heating power. A heating efficiency of 0.45--0.65 has been achieved by pumping in the extraordinary wave from the inner side of the torus at electron densities in the range (0.3--1.8) x 10/sup 13/ cm/sup -3/. The maximum density here is 2.5 times the critical density. Numerical analysis of the wave propagation and absorption shows that at n/sub 0/>n/sub c/ a governing role should be played by the absorption of the longitudinal plasma-wave mode, which is formed during conversion in the upper-hybrid-resonance region.