The simulation of ELM suppression by ion cyclotron resonance heating in EAST using BOUT plus
文献类型：期刊论文
| 作者 | Li, Y. L.1,2; Xia, T. Y.2 ; Zou, X. L.3; Zhang, X. J.2; Zhou, C.1; Mao, S. F.1; Gui, B.2; Huang, Y. Q.1,2; Hu, G. H.2; Ye, M. Y.1
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| 刊名 | NUCLEAR FUSION
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| 出版日期 | 2022-06-01 |
| 卷号 | 62 |
| ISSN号 | 0029-5515 |
| 关键词 | ELM suppression ICRH BOUT plus plus RF sheath effective range of sheath potential E x B shear rate |
| DOI | 10.1088/1741-4326/ac4efd |
| 通讯作者 | Xia, T. Y.(xiaty@ipp.ac.cn) ; Ye, M. Y.(yemy@ustc.edu.cn) |
| 英文摘要 | Edge localized modes (ELMs) are completely suppressed by ion cyclotron resonant heating (ICRH) during H-mode discharge, which is first observed in the Experimental Advanced Superconducting Tokamak (EAST). The electromagnetic turbulence model in the BOUT++ framework is applied to the simulations, with the aim of obtaining the key physics mechanisms of ELM suppression by ICRH. The simulations, for the EAST experiment with no ELMs after ICRH, reveal that the radio frequency (RF) sheath plays a key role in the suppression of ELMs. The simulation results show that: (a) using the flow-balanced electric field, the ELM sizes are about 3.4% before ICRH, and 2.1% after ICRH. Although the smaller ELM is obtained with ICRH, it still belongs to relatively large ELMs; (b) instead of the flow-balance condition, the radial electric field E (r) is calculated using the RF sheath model, and the ELM size is about 0.36% with ICRH, much closer to the small/no ELM regime. After considering the effect of ICRH, the larger E x B shear rate in the pedestal and scrape-off layer induced by the RF sheath reduces the linear growth rate, and enhances the nonlinear mode coupling. Furthermore, we find that there is an effective range of the sheath potential, in which the ELM can be well suppressed, but beyond this range the ELM may be only mitigated rather than suppressed. This can reasonably explain why the probability of ELM suppression by ICRH appearing in the experiments is low. |
| WOS关键词 | EDGE LOCALIZED MODES ; DIGITAL BISPECTRAL ANALYSIS ; VELOCITY SHEAR ; CONFINEMENT ; CONVECTION ; TURBULENCE ; TRANSPORT ; ENERGY |
| 资助项目 | National Key R&D Program of China[2019YFE03030004] ; National Key R&D Program of China[2017YFE0301101] ; National Natural Science Foundation of China[12175275] ; National Natural Science Foundation of China[11975232] ; National Natural Science Foundation of China[11675217] ; Comprehensive Research Facility for Fusion Technology Program of China[2018-000052-73-01-001228] ; Collaborative Innovation Program of Hefei Science Center, CAS[2021HSC-CIP018] ; Youth Innovation Promotion Association Chinese Academy of Sciences[Y2021114] ; K.C. Wong Education Foundation |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| 出版者 | IOP Publishing Ltd |
| WOS记录号 | WOS:000787097200001 |
| 资助机构 | National Key R&D Program of China ; National Natural Science Foundation of China ; Comprehensive Research Facility for Fusion Technology Program of China ; Collaborative Innovation Program of Hefei Science Center, CAS ; Youth Innovation Promotion Association Chinese Academy of Sciences ; K.C. Wong Education Foundation |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/131440]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Xia, T. Y.; Ye, M. Y. |
| 作者单位 | 1.Univ Sci & Technol China, Sch Nucl Sci & Technol, Hefei, Peoples R China 2.Chinese Acad Sci, Inst Plasma Phys, Hefei, Peoples R China 3.CEA, IRFM, F-13108 St Paul Les Durance, France |
| 推荐引用方式 GB/T 7714 | Li, Y. L.,Xia, T. Y.,Zou, X. L.,et al. The simulation of ELM suppression by ion cyclotron resonance heating in EAST using BOUT plus[J]. NUCLEAR FUSION,2022,62. |
| APA | Li, Y. L..,Xia, T. Y..,Zou, X. L..,Zhang, X. J..,Zhou, C..,...&Ye, M. Y..(2022).The simulation of ELM suppression by ion cyclotron resonance heating in EAST using BOUT plus.NUCLEAR FUSION,62. |
| MLA | Li, Y. L.,et al."The simulation of ELM suppression by ion cyclotron resonance heating in EAST using BOUT plus".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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