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Runaway electron generation and loss in EAST disruptions

文献类型：期刊论文

作者Tang, T.3,4; Zeng, L.4; Chen, D.4; Sun, Y.4; Zhao, H.4; Zhou, T.4; Ti, A.4; Lin, S.4; Zhou, R.4; Zhu, X.1,2
刊名NUCLEAR FUSION
出版日期2021-07-01
卷号61
关键词fusion plasma EAST disruption runaway electron kinetic instability
ISSN号0029-5515
DOI10.1088/1741-4326/abf62f
通讯作者Zeng, L.(zenglong@ipp.ac.cn) ; Gao, X.(xgao@ipp.ac.cn)
英文摘要Runaway currents have been detected during unintended disruptions in the circular plasma with the limiter configuration in the Experimental Advanced Superconducting Tokamak (EAST). The runaway electron (RE) plateau can carry up to 80% of the pre-disruption plasma current. The highest runaway currents correspond to the lowest loop voltage, which is contrary to the observations made in most tokamaks. This anomalous behavior is attributed to the acceleration of the pre-existing wave resonant suprathermal electrons by lower hybrid waves during the disruption decay phase. Two distinct types of RE-related relaxation phenomena, distinguished on the basis of the amplitude of the magnetic fluctuations, have been found during the disruptions. Large-amplitude magnetohydrodynamic activity with indications of RE loss is observed during the RE plateau when the edge safety factor decreases to less than 3, and the external kink mode is discussed to resolve this anomaly. Burst-like relaxations with small-amplitude magnetic fluctuations and similar to 0.6 kHz frequency are confirmed from the spikes in the hard x-ray array signals under a negative loop voltage. Measurement of the RE energy distribution suggests that the instability is driven by medium-energy REs.
WOS关键词MAGNETIC TURBULENCE
资助项目Youth Innovation Promotion Association of Chinese Academy of Sciences[2017480] ; National Key R&D Program of China[2017YFE0301205] ; National Magnetic Confinement Fusion Science Program of China[2017GB106004B] ; National Natural Science Foundation of China[11775267] ; Users of Excellence program of Hefei Science Center CAS[2019HSC-UE013]
WOS研究方向Physics
语种英语
WOS记录号WOS:000655613000001
出版者IOP PUBLISHING LTD
资助机构Youth Innovation Promotion Association of Chinese Academy of Sciences ; National Key R&D Program of China ; National Magnetic Confinement Fusion Science Program of China ; National Natural Science Foundation of China ; Users of Excellence program of Hefei Science Center CAS
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/123700]  
专题中国科学院合肥物质科学研究院
通讯作者Zeng, L.; Gao, X.
作者单位1.Shenzhen Univ, Coll Optoelect Engn, Key Lab Optoelect Devices & Syst, Minist Educ & Guangdong Prov, Shenzhen 518060, Peoples R China
2.Shenzhen Univ, Adv Energy Res Ctr, Shenzhen 518060, Peoples R China
3.Univ Sci & Technol China, Hefei 230031, Peoples R China
4.Chinese Acad Sci, Inst Plasma Phys, Hefei Inst Phys Sci, Hefei 230031, Peoples R China
5.Forschungszentrum Julich, Inst Energy & Climate Res, Plasma Phys IEK 4, D-52425 Julich, Germany
推荐引用方式
GB/T 7714		 Tang, T.,Zeng, L.,Chen, D.,et al. Runaway electron generation and loss in EAST disruptions[J]. NUCLEAR FUSION,2021,61.
APA Tang, T..,Zeng, L..,Chen, D..,Sun, Y..,Zhao, H..,...&Gao, X..(2021).Runaway electron generation and loss in EAST disruptions.NUCLEAR FUSION,61.
MLA Tang, T.,et al."Runaway electron generation and loss in EAST disruptions".NUCLEAR FUSION 61(2021).

入库方式： OAI收割

来源：合肥物质科学研究院

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