The simulation of ELMs mitigation by pedestal coherent mode in EAST using BOUT plus
文献类型：期刊论文
| 作者 | Li, Y. L.4,5; Xia, T. Y.5 ; Zou, X. L.3; Zhou, C.4; Zhang, X. J.5; Zhu, Y. R.2; Tang, T. F.1; Mao, S. F.4; Gui, B.5; Huang, Y. Q.4,5
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| 刊名 | NUCLEAR FUSION
 |
| 出版日期 | 2022-06-01 |
| 卷号 | 62 |
| ISSN号 | 0029-5515 |
| 关键词 | ELM mitigation nonlinear interaction phase coherence time (PCT) coherent mode (CM) |
| DOI | 10.1088/1741-4326/ac5449 |
| 通讯作者 | Xia, T. Y.(xiaty@ipp.ac.cn) ; Ye, M. Y.(yemy@ustc.edu.cn) |
| 英文摘要 | A general phenomenon that the edge localized modes (ELMs) can be effectively mitigated with the enhanced coherent modes (CMs) has been observed on EAST. For this phenomenon, the experimental statistical analysis and electromagnetic (EM) simulations have been performed. There is a threshold value of the CM intensity in the experiments, which plays a key role in ELMs mitigation. Through the ELITE and conventional BOUT++ analysis, we found that when the insignificant ELM and enhanced CM co-exist, the pedestal is located in unstable P-B region and the ELM is relatively large. The simulation results only using the experimental profiles without considering other factors cannot reproduce the no significant ELM experiment. The CM enhances the edge turbulence, which can control ELMs. Therefore, the effects of CM are considered to explain the ELM mitigation. Modifying the three-field reduced model in BOUT++, an imposed perturbation is added as the CM. The simulation results indicate that: without the CM, the ELM size belongs to the relative large ELM region; after considering the CM, the ELM is mitigated and the energy loss is reduced by about 44.5%. Analysis shows that the CM enhances the three-wave nonlinear interactions in the pedestal and reduces the phase coherence time (PCT) between the pressure and potential, which lead the perturbation to tend to be 'multiple-mode' coupling. The competition of free energy between the multiple modes leads to the lack of obvious filament structures and the decreased energy loss. The above reveals that there is a competitive relationship between turbulence and ELMs, and the CM-enhanced turbulence can effectively reduce ELM energy loss. In addition, through the parameter scanning, there is a threshold of the amplitude A, which is consistent with the statistical results in the experiments. |
| WOS关键词 | DIGITAL BISPECTRAL ANALYSIS ; ASDEX ; CONFINEMENT ; REGIME |
| 资助项目 | National Key R&D Program of China[2017YFE0301101] ; National Key R&D Program of China[2019YFE03030004] ; 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[2021HSCCIP018] ; Youth Innovation Promotion Association Chinese Academy of Sciences[Y2021114] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| 出版者 | IOP Publishing Ltd |
| WOS记录号 | WOS:000777836100001 |
| 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 |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/128651]  |
| 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.Shenzhen Univ, Coll Phys & Optoelect Engn, Shenzhen 518060, Peoples R China 2.Southwestern Inst Phys, POB 432, Chengdu 610041, Peoples R China 3.CEA, IRFM, F-13108 St Paul Les Durance, France 4.Univ Sci & Technol China, Sch Nucl Sci & Technol, Hefei, Peoples R China 5.Chinese Acad Sci, Inst Plasma Phys, Hefei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Y. L.,Xia, T. Y.,Zou, X. L.,et al. The simulation of ELMs mitigation by pedestal coherent mode in EAST using BOUT plus[J]. NUCLEAR FUSION,2022,62. |
| APA | Li, Y. L..,Xia, T. Y..,Zou, X. L..,Zhou, C..,Zhang, X. J..,...&Ye, M. Y..(2022).The simulation of ELMs mitigation by pedestal coherent mode in EAST using BOUT plus.NUCLEAR FUSION,62. |
| MLA | Li, Y. L.,et al."The simulation of ELMs mitigation by pedestal coherent mode 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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