Nonlinear Transition from Mitigation to Suppression of the Edge Localized Mode with Resonant Magnetic Perturbations in the EAST Tokamak.
Evidence of a nonlinear transition from mitigation to suppression of the edge localized mode (ELM) by using resonant magnetic perturbations (RMPs) in the EAST tokamak is presented. This is the first demonstration of ELM suppression with RMPs in slowly rotating plasmas with dominant radio-frequency wave heating. Changes of edge magnetic topology after the transition are indicated by a gradual phase shift in the plasma response field from a linear magneto hydro dynamics modeling result to a vacuum one and a sudden increase of three-dimensional particle flux to the divertor. The transition threshold depends on the spectrum of RMPs and plasma rotation as well as perturbation amplitude. This means that edge topological changes resulting from nonlinear plasma response plays a key role in the suppression of ELM with RMPs.
Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China.
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Sun
Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China.|Institute for Energy and Climate Research-Plasma Physics, Forschungszentrum Jülich, 52425 Jülich, Germany.
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Liang
CCFE Culham Science Centre, Abingdon, OX14 3DB, United Kingdom.
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Liu
Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China.
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Gu
School of Physics and Optoelectronic Engineering, Dalian University of Technology, Dalian 116024, China.
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Yang
Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China.
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Guo
Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China.
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Shi
Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China.
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Jia
Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China.
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Wang
Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China.
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Lyu
Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China.
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Zhou
Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China.
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Liu
Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China.
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Zang
Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China.
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Liu
Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China.
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Chu
Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China.
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Wang
Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China.
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Zhang
Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China.
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Qian
Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China.
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Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China.
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Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China.
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Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China.
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Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China.
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Gong
Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China.
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Ji
Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China.
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Wang
Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China.
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Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China.
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Song
Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China.
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Yuan
Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China.
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Sheng
Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China.
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Gao
Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China.
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Fu
Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China.
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