Wenzhe Mao
(University of Science and Technology of China)
The fluctuation-induced dynamo electric field has been measured in the core of high-temperature EAST tokamak plasmas using Faraday-effect polarimetry and electron cyclotron emission (ECE). The magnetic amplitude of the kink mode (m/n = 1/1) saturates at 30–50 Gauss inside the q = 1 resonant surface. Electron temperature fluctuations reach up to 10% near the resonant surface, where the gradient of electron pressure exhibits a local maximum. These temperature fluctuations are predominantly driven by magnetic perturbations, and a correlation between electron temperature and radial magnetic fluctuations gives rise to a non-vanishing parallel dynamo electric field on the order of 10 mV/m, which is comparable to the resistive electric field (η∥ J). The dynamo electric field is capable of flattening the current profile, thereby facilitating the achievement of "hybrid" modes in a steady-state magnetic equilibrium.
| Keyword-1 |
tokamak
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| Keyword-2 |
dynamo
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Wenzhe Mao
(University of Science and Technology of China)
Prof.
Weixing Ding
(University of Science and Technology of China)
Prof.
Haiqing Liu
(Institute of Plasma Physics, Chinese Academy of Sciences)
Prof.
David Brower
(Department of Physics and Astronomy, University of California Los Angeles)
Dr
Yuqi Chu
(Department of Physics and Astronomy, University of California Los Angeles)
Dr
Hui Lian
(Institute of Plasma Physics, Chinese Academy of Sciences)
Dr
Aang Ti
(Institute of Plasma Physics, Chinese Academy of Sciences)
Dr
Long Zeng
(Tsinghua University)
Dr
Hailin Zhao
(Institute of Plasma Physics, Chinese Academy of Sciences)
Dr
Ling Zhang
(Institute of Plasma Physics, Chinese Academy of Sciences)
Dr
Jinping Qian
(Institute of Plasma Physics, Chinese Academy of Sciences)
Dr
Qing Zang
(Institute of Plasma Physics, Chinese Academy of Sciences)
Mr
Xianzu Gong
(Institute of Plasma Physics, Chinese Academy of Sciences)
Dr
Liqun Hu
(Institute of Plasma Physics, Chinese Academy of Sciences)
Dr
Liqing Xu
(Institute of Plasma Physics, Chinese Academy of Sciences)
Prof.
Chu Zhou
(University of Science and Technology of China)
Prof.
Tao Lan
(University of Science and Technology of China)
Prof.
Adi Liu
(University of Science and Technology of China)
Prof.
Jinlin Xie
(University of Science and Technology of China)
Prof.
Ge Zhuang
(University of Science and Technology of China)
Mr
Yuntao Song
(Institute of Plasma Physics, Chinese Academy of Sciences)
Mr
Baonian Wan
(Institute of Plasma Physics, Chinese Academy of Sciences)
Mr
Jiangang Li
(Institute of Plasma Physics, Chinese Academy of Sciences)
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