L-mode to H-mode transition triggered by sawtooth-induced heat flux in EAST
文献类型：期刊论文
| 作者 | Shao, L. M.1 ; Xu, G. S.1,4; Yan, N.1; Chen, R.1; Chen, L.1; Duan, Y. M.1; Gao, W.1; Qian, J. P.1; Shen, W.1; Ti, A.1
|
| 刊名 | PHYSICS LETTERS A
 |
| 出版日期 | 2020-03-30 |
| 卷号 | 384 |
| ISSN号 | 0375-9601 |
| 关键词 | L-H transition Sawtooth Turbulent decorrelation rate Nonlinear energy transfer rate Turbulence energy input rate |
| DOI | 10.1016/j.physleta.2019.126184 |
| 通讯作者 | Shao, L. M.(shaolm@ipp.ac.cn) |
| 英文摘要 | H-modes induced by sawtooth events can be often observed in discharges with marginal auxiliary power injection in EAST. Poloidal flow shear at the very plasma edge, increasing similar to 25% up to the threshold value, is observed just before the L-H transition by means of a fast reciprocating probe array in EAST. This suddenly risen poloidal flow shear, caused by the increased turbulent driven Reynolds force, is motived by the heat pulse originally released by a sawtooth crash at the plasma core. Associated with the critical poloidal flow shear, the local turbulent decorrelation rate increases significantly. The increased turbulent decorrelation rate compensated by nonlinear energy transfer rate from the turbulence to the low-frequency shear flows, exceeding the turbulence energy input rate, is sustained for several hundred microseconds till the turbulence quench happening. (C) 2019 Elsevier B.V. All rights reserved. |
| WOS关键词 | PULSE-PROPAGATION ; TOKAMAK |
| 资助项目 | National Magnetic Confinement Fusion Program of China[2015GB101000] ; National Key Research and Development Program of China[2017YFE0300402] ; National Natural Science Foundation of China[11805238] ; National Natural Science Foundation of China[11575235] ; National Natural Science Foundation of China[11575248] ; CASHIPS Director's Fund[YZJJ2018QN9] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:000517851900007 |
| 资助机构 | National Magnetic Confinement Fusion Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; CASHIPS Director's Fund |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/103953]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Shao, L. M. |
| 作者单位 | 1.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China 2.Max Planck Inst Plasma Phys, Boltzmannstr 2, D-85748 Garching, Germany 3.Southwestern Inst Phys, Chengdu 610041, Peoples R China 4.Univ Sci & Technol China, Hefei 230031, Peoples R China |
| 推荐引用方式 GB/T 7714 | Shao, L. M.,Xu, G. S.,Yan, N.,et al. L-mode to H-mode transition triggered by sawtooth-induced heat flux in EAST[J]. PHYSICS LETTERS A,2020,384. |
| APA | Shao, L. M..,Xu, G. S..,Yan, N..,Chen, R..,Chen, L..,...&Zhou, T. F..(2020).L-mode to H-mode transition triggered by sawtooth-induced heat flux in EAST.PHYSICS LETTERS A,384. |
| MLA | Shao, L. M.,et al."L-mode to H-mode transition triggered by sawtooth-induced heat flux in EAST".PHYSICS LETTERS A 384(2020). |
入库方式： OAI收割
来源：合肥物质科学研究院
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