Improved lower hybrid current drive efficiency with IBW heating in the HT-7 tokamak |
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| Authors: | Z.Y. Chen B.N. Wan HT- Team |
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| Affiliation: | a Department of Physics, Yunnan Normal University, Kunming 650092, PR China
b Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, PR China |
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| Abstract: | Lower hybrid current drive (LHCD) efficiency in the HT-7 tokamak is observed to increase about 30% with ion Bernstein wave (IBW) heating. The current drive efficiency as high as  has been reached in HT-7 thanks to an LHCD/IBW synergy. The IBWs are significantly coupled to the fast electrons produced by the lower hybrid waves, thus results in higher fast electron photon temperature in the combined LHCD + IBW scenario. The interaction of LHCD + IBW improved current drive efficiency. |
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| Keywords: | 52.55.Fa 52.35.Hr 52.50.Sw |
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