Magnetic field topology modeling under resonant magnetic perturbations on EAST

Jie HUANG (黄杰); Yasuhiro SUZUKI (铃木康浩); Yunfeng LIANG (梁云峰); Manni JIA (贾曼妮); Youwen SUN (孙有文); Nan CHU (楚南); Jichan XU (许吉禅); Muquan WU (吴木泉); EAST team

doi:10.1088/2058-6272/ab0d35

Plasma Science and Technology > 2019 > 21(6): 65105-065105. > DOI: 10.1088/2058-6272/ab0d35

Jie HUANG (黄杰), Yasuhiro SUZUKI (铃木康浩), Yunfeng LIANG (梁云峰), Manni JIA (贾曼妮), Youwen SUN (孙有文), Nan CHU (楚南), Jichan XU (许吉禅), Muquan WU (吴木泉), EAST team. Magnetic field topology modeling under resonant magnetic perturbations on EAST[J]. Plasma Science and Technology, 2019, 21(6): 65105-065105. DOI: 10.1088/2058-6272/ab0d35

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Magnetic field topology modeling under resonant magnetic perturbations on EAST

¹ Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China
² University of Science and Technology of China, Hefei 230026, People’s Republic of China
³ National Institutes of Fusion Sciences, National Institutes of Natural Sciences, Oroshi-cho, 322-6, Toki 509-5292, Japan
⁴ SOKENDAI, The Graduate University for Advanced Studies, Oroshi-cho, 322-6, Toki 509-5292, Japan
⁵ Institute for Energy and Climate Reserch–Plasma Physics, Forschungszentrum Juelich, Association EURATOM-FZJ, Trilateral Euregio Cluster, D-52425, Juelich, Germany

Funds: his work is supported by the National Key R&D Program of China (No. 2017YFE0301100), National Natural Science Foundation of China (No. 51828101), the KC Wong Education Foundation, the China Scholarship Council, the NIFS (National Institute for Fusion Science) Collaborative Research Program (NIFS16KNTT042) and JSPS (the Japan Society for the Promotion of Science) Grant-in-aid for Scientific Research (B) 18H01202.

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Received Date: November 29, 2018

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Abstract

Abstract

In order to understand the mechanism by which the resonant magnetic perturbation (RMP) mitigates or suppresses the edge-localized mode (ELM), the topological study of the edge magnetic field in ELM mitigation or suppression phase is a critical issue. To model the three-dimensional magnetic field topology superposed RMP on Experimental Advanced Superconducting Tokamak, a numerical model using the field line tracing method for both vacuum and ideal plasma response approximations is proposed. Using the numerical model, the topological change and the penetration depth of the stochastic field lines in the edge magnetic field are studied in an RMP experiment. Comparing profiles of minimum ρ on edge stochastic field lines and the particle flux pattern, the ideal plasma response changes the field line penetration depth while remaining similar profile relative to vacuum approximation. To mitigate and suppress ELM strongly, the deep penetration of RMP fields and topological changes of the edge magnetic field is a key from our modeling.
- magnetic topology,
- ideal plasma response,
- tokamaks,
- resonant magnetic perturbation

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Magnetic field topology modeling under resonant magnetic perturbations on EAST