Study of density fluctuation during low hybrid current drive on HT-7 tokamak |
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| Authors: | WY Zhang YD Li X Gao SY Lin Q Zang YX Jie XD Zhang J Li HT- Teams |
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| Institution: | Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei, Anhui 230031, People's Republic of China |
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| Abstract: | An experimental study of medium and high-k density fluctuations has been performed during low hybrid current drive (LHCD) in the HT-7 tokamak. Two series of plasma discharges in different plasma current with a limiter configuration were conducted in which the injected LHW power was gradually increased. The fluctuation level of the mode in channel kθ=12 cm−1 and kθ=20 cm−1 is related to the q profile, and the normalized frequency spectrum is found to be independent of the LHW power. |
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