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Progress on physics understanding of improved confinement with fishbone instability at low q (95) < 3.5 operation regime in EAST

文献类型：期刊论文

作者Zhang, B.2; Gong, X.2; Qian, J.2; Zeng, L.2; Xu, L. Q.2; Duan, Y. M.2; Zhang, J. Y.1,2; Hu, Y. C.1,2; Jia, T. Q.1,2; Li, P.1,2
刊名NUCLEAR FUSION
出版日期2022-12-01
卷号62
ISSN号0029-5515
关键词confinement ITER baseline fishbone
DOI10.1088/1741-4326/ac97f3
通讯作者Zhang, B.(binzhang@ipp.ac.cn) ; Qian, J.(jpqian@ipp.ac.cn)
英文摘要Improved confinement at the low q (95) < 3.5 operation regime with fishbone instability compared to sawtooth oscillation has been observed and investigated on the EAST under the dominant electron heating condition with a tungsten divertor. The formation of an internal transport barrier in the ion thermal channel strongly correlates to the excitation of the fishbone, accompanied by reduced particle outward transport in the core region identified by a central peaked density profile. Current density distribution is found to change from a monotonic shape with q (0) < 1 during sawtooth oscillation to a central flat structure, magnetic shear s similar to 0 at rho < 0.4, with the fishbone instability at where the higher off-axis bootstrap current fraction might play a critical role. Linear gyrokinetic simulation by NLT code was carried out to investigate the turbulent transport characteristics, which is qualitatively in good agreement with experimental measurements from CO2 laser collective scattering diagnostics. The electron-scale trapped electron mode that dominates the turbulent transport during sawtooth is found to be stabilized with the fishbone at identical heating power and plasma configurations.
WOS关键词INTERNAL TRANSPORT BARRIER ; MODES ; KINK
资助项目National MCF Energy RD Program[2019YFE03040000] ; Users with Excellence Program of Hefei Science Center CAS[2021HSC-UE018] ; Users with Excellence Program of Hefei Science Center CAS[2020HSC-UE01] ; Science Foundation of Institute of Plasma Physics, the Chinese Academy of Sciences[DSJJ-2021-04] ; External Cooperation Program of the Chinese Academy of Sciences[116134KYSB20180035] ; National Natural Science Foundation of China[12005262]
WOS研究方向Physics
语种英语
出版者IOP Publishing Ltd
WOS记录号WOS:000883761100001
资助机构National MCF Energy RD Program ; Users with Excellence Program of Hefei Science Center CAS ; Science Foundation of Institute of Plasma Physics, the Chinese Academy of Sciences ; External Cooperation Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/130381]  
专题中国科学院合肥物质科学研究院
通讯作者Zhang, B.; Qian, J.
作者单位1.Univ Sci & Technol China, Hefei 230026, Peoples R China
2.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
3.Shenzhen Univ, Shenzhen, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, B.,Gong, X.,Qian, J.,et al. Progress on physics understanding of improved confinement with fishbone instability at low q (95) < 3.5 operation regime in EAST[J]. NUCLEAR FUSION,2022,62.
APA Zhang, B..,Gong, X..,Qian, J..,Zeng, L..,Xu, L. Q..,...&East Team.(2022).Progress on physics understanding of improved confinement with fishbone instability at low q (95) < 3.5 operation regime in EAST.NUCLEAR FUSION,62.
MLA Zhang, B.,et al."Progress on physics understanding of improved confinement with fishbone instability at low q (95) < 3.5 operation regime in EAST".NUCLEAR FUSION 62(2022).

入库方式： OAI收割

来源：合肥物质科学研究院

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