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Author(s):
Y. Takase, T. Watari, R. Kumazawa, T. Seki, K. Adati, R. Ando, T. Aoki, Y. Hamada, S. Hirokura, K. Ida, E. Kako, K. Kawahata, Y. Kawasumi, K. Masai, K. Narihara, K. Ohkubo M. Sakamoto, F. Shimpo, Y. Taniguchi, K. Toi and T. Tsuzuki
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Title:
Fast Wave Heating at Intermediate Ion Cyclotron Harmonics on the JIPP T-IIU Tokamak
Date of publication:
Feb. 1990
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Key words:
Fast Wave Current Drive, Fast Wave Heating, Density Limit, JIPPT-IIU
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Abstract:
Fast wave absorption and heating at a relatively high ion cyclotron harmonic (omega simeq 6 Omega_ D) were studied on the JIPP T-II U tokamak. In spit of the low absorption efficiency predicted by a simple theory for present experimental parameters, appreciable electron and ion heating has been observed. Heating is most effective at relatively low densities( bar{n}_e simeq 1 x 10^19m^-3). Ion tail was observed on the majority deuterium energy spectrum but not on the minority hydrogen spectrum, which suggests the possibility of direct absorption of mode-converted ion Bernstein wave power by deuterium ions. Because of the density rise caused by rf injection, a clear evidence of fast wave driven current was not observed.
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