Experimental observation and simulation analysis of the relationship between the fishbone and ITB formation on EAST tokamak
文献类型：期刊论文
| 作者 | Liu, Z. X.1,5; Ge, W. L.2; Wang, F.2; Liu, Y. J.1,5; Yang, Y.3 ; Wu, M. Q.4; Wang, Z. X.2; Zhang, X. X.2; Li, H.1,5; Xie, J. L.1,5
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| 刊名 | NUCLEAR FUSION
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| 出版日期 | 2020-12-01 |
| 卷号 | 60 |
| ISSN号 | 0029-5515 |
| 关键词 | fishbone ITB M3D-K fast ion EAST |
| DOI | 10.1088/1741-4326/abb146 |
| 通讯作者 | Wang, F.(fengwang@dlut.edu.cn) |
| 英文摘要 | A strong relationship between the fishbone instability and internal transport barrier (ITB) formation has been found on the Experimental Advanced Superconducting Tokamak (EAST) in high beta(N) ELMy H-mode discharges. ITB formation always appears after the fishbone instability, and the fishbone disappears when the ITB grows to a certain extent. Hybrid simulations with the global kinetic-magnetohydrodynamic (MHD) code M3D-K have been carried out to investigate the linear stability and non-linear dynamics of beam-driven fishbone instabilities in these shots. The simulation results show that the fishbone instability absorbs the energy of the fast ions and changes the distribution function of the fast ions, leading to the accumulation of fast ions near the ITB, which might eventually assist in the formation of the ITB. The q = 1 surface disappearance caused by the bootstrap current generated by the steep pressure gradient in the ITB region has been considered as the reason for the fishbone instability vanishing. This process has also been reproduced in simulation. However, the timescale of this change in the q profile is not sufficient under classical current diffusion times. The simulation utilizes another assumption explaining the disappearance of the fishbone instability. The density will form a barrier in the ITB region, which should broaden the distribution of the fast ions, and the broadening profile of the distribution of the fast ion mitigates the growth of the fishbone instability. |
| WOS关键词 | INTERNAL TRANSPORT BARRIER ; RECONSTRUCTION ; DISCHARGES ; PLASMAS |
| 资助项目 | National Natural Science Foundation of China[11675211] ; National Natural Science Foundation of China[11975230] ; National Natural Science Foundation of China[11905145] ; National Natural Science Foundation of China[11975068] ; National Magnetic Confinement Fusion Program of China[2017YFE0301700] ; National Magnetic Confinement Fusion Program of China[2017YFE0301204] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| 出版者 | IOP PUBLISHING LTD |
| WOS记录号 | WOS:000583412000001 |
| 资助机构 | National Natural Science Foundation of China ; National Magnetic Confinement Fusion Program of China |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/104835]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Wang, F. |
| 作者单位 | 1.Univ Sci & Technol China, Dept Engn & Appl Phys, Hefei 230026, Anhui, Peoples R China 2.Dalian Univ Technol, Sch Phys, Minist Educ, Key Lab Mat Modificat Laser Ion & Electron Beams, Dalian 116024, Peoples R China 3.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China 4.Shenzhen Univ, Adv Energy Res Ctr, Shenzhen 518060, Peoples R China 5.Univ Sci & Technol China, KTX Lab, Hefei 230026, Anhui, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Z. X.,Ge, W. L.,Wang, F.,et al. Experimental observation and simulation analysis of the relationship between the fishbone and ITB formation on EAST tokamak[J]. NUCLEAR FUSION,2020,60. |
| APA | Liu, Z. X..,Ge, W. L..,Wang, F..,Liu, Y. J..,Yang, Y..,...&Liu, W. D..(2020).Experimental observation and simulation analysis of the relationship between the fishbone and ITB formation on EAST tokamak.NUCLEAR FUSION,60. |
| MLA | Liu, Z. X.,et al."Experimental observation and simulation analysis of the relationship between the fishbone and ITB formation on EAST tokamak".NUCLEAR FUSION 60(2020). |
入库方式： OAI收割
来源：合肥物质科学研究院
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