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Author(s):
T.Watari, R.Kumazawa,T.Seki, A.Ando,Y.Oka, O.Kaneko, K.Adati, R.Ando, T.Aoki, R.Akiyama, Y.Hamada, S.Hidekuma, S.Hirokura, E.Kako, A.Karita, K.Kawahata, T.Kawamoto, Y.Kawasumi, S.Kitagawa, Y.Kitoh, M.Kojima, T. Kuroda, K.Masai, S.Morita, K.Narihara, Y.Ogawa, K.Ohkubo, S.Okajima, T.Ozaki, M.Sakamoto, M.Sasao, K.Sato, K.N.Sato, F.Shinbo, H.Takahashi, S.Tanahashi, Y.Taniguchi, K.Toi, T.Tsuzuki, Y.Takase, K.Yoshioka, S.Kinoshita, M.Abe, H.Fukumoto, K.Takeuchi, T.Okazaki and M.Ohtuka
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Title:
Application of Intermediate Frequency Range Fast Wave to JIPP T-IIU and HT-2 Plasma
Date of publication:
Sep. 1990
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Key words:
fast wave, current drive, higher harmonic heating, JIPP T-IIU, HT-2
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Abstract:
Fast wave well above the fundamental ion cyclotron frequency were applied on JIPP T-IlU and HT-2 tokamak plasma for the study of current drive, electron heating, and third harmonics ion cyclotron heating. In HT-2, up to 10 kA of plasma current was driven by 100 MHz fast wave in the density range of 0.3 ~ 3 star l0^18m^-3 that corresponds to I - 10 times above the lower hybrid current drive density limit. In JIPP T-IlU, an efficient electron temperature increase was observed on application of 130MHz fast waves in a density range of 2 ~ 3 star l0^19m^-3 two orders magnitude higher than the lower hybrid density limit . In a further higher density range above 3 star 10^19 m^-3 the third harmonics cyclotron heating on the additionally heated target plasma gives a heating efficiency as good as that of fundamental harmonic heating.
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