Stationary high-performance grassy ELM regime in EAST
文献类型：期刊论文
| 作者 | Yang, Q. Q.1; Xu, G. S.1 ; Yan, N.1; Wang, Y. F.1; Lin, X.1,3; Ye, Y.1; Hu, G. H.1; Zhang, L.1; Duan, Y. M.1; Xu, J. C.2
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| 刊名 | NUCLEAR FUSION
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| 出版日期 | 2020-07-01 |
| 卷号 | 60 |
| ISSN号 | 0029-5515 |
| 关键词 | grassy ELM regime EAST tokamak CFETR |
| DOI | 10.1088/1741-4326/ab8e0f |
| 通讯作者 | Xu, G. S.(gsxu@ipp.ac.cn) |
| 英文摘要 | A stationary, high-performance grassy edge-localized mode (ELM) regime has been successfully accessed on the EAST tokamak since the 2016 campaign. beta(p) increase via increase of heating power or q95 are both found to facilitate a higher grassy ELM frequency. Edge measurement of absolute extreme ultraviolet radiation indicates that the affected area by grassy ELMs is localized at the pedestal region and the perturbations there induced by grassy ELMs can be 90% smaller than that by type-I ELMs. Parameter scan demonstrates that the grassy ELM regime has good density control capacity, and the access to the grassy ELM regime is independent of the toroidal field direction and low-hybrid-wave power. Statistical analysis indicates that the grassy ELM regime is highly reproducible in a wide parameter space when edge safety factor q(95) and poloidal beta beta(p) are simultaneously high enough (q(95) >= 5.3 and beta(p) >= 1.2). High triangularity delta contributes to the increase of grassy ELM frequency while the requirement on high internal inductance l(i) in the JET tokamak for grassy ELMs cannot be found in EAST. The operational space in pedestal top collisionality for the EAST grassy ELMs is in the range of nu(e,ped)* similar to 1- 6. The exploration towards lower nu(e,ped)* is mainly limited by the available heating power. Evolution of a coherent mode at pedestal top suggests that grassy ELMs most likely generate in the steep-gradient region of the pedestal, rather than on the pedestal top or near the separatrix. The grassy ELM regime offers a highly promising approach for further exploration of long-pulse high-performance H-mode operations in EAST, with potential application to the Chinese Fusion Engineering Test Reactor (CFETR) as the baseline scenario and a primary solution for the control of ELMs. |
| WOS关键词 | EDGE-LOCALIZED MODES ; PARTICLE LOSSES ; GOOD CONFINEMENT ; ASDEX UPGRADE ; H-MODES ; ENERGY ; JET ; EXTRAPOLATION ; PLASMAS |
| 资助项目 | National Magnetic Confinement Fusion Science Program of China[2015GB101002] ; National Key R & D Program of China[2017YFE0301300] ; National Natural Science Foundation of China[11575236] ; National Natural Science Foundation of China[11675220] ; National Natural Science Foundation of China[11875294] ; National Natural Science Foundation of China[U19A20113] ; National Natural Science Foundation of China[11922513] ; AHNFS[1808085J07] ; K.C. Wong Education Foundation ; Special Research Assistant Funding of CAS ; Key Research Program of Frontier Sciences, CAS[QYZDB-SSW-SLH001] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| 出版者 | IOP PUBLISHING LTD |
| WOS记录号 | WOS:000542580900001 |
| 资助机构 | National Magnetic Confinement Fusion Science Program of China ; National Key R & D Program of China ; National Natural Science Foundation of China ; AHNFS ; K.C. Wong Education Foundation ; Special Research Assistant Funding of CAS ; Key Research Program of Frontier Sciences, CAS |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/71302]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Xu, G. S. |
| 作者单位 | 1.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China 2.Anhui Univ Sci & Technol, Sch Mech Engn, Huainan 232001, Peoples R China 3.Univ Sci & Technol China, Hefei 230026, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Q. Q.,Xu, G. S.,Yan, N.,et al. Stationary high-performance grassy ELM regime in EAST[J]. NUCLEAR FUSION,2020,60. |
| APA | Yang, Q. Q..,Xu, G. S..,Yan, N..,Wang, Y. F..,Lin, X..,...&Wan, B. N..(2020).Stationary high-performance grassy ELM regime in EAST.NUCLEAR FUSION,60. |
| MLA | Yang, Q. Q.,et al."Stationary high-performance grassy ELM regime in EAST".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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