Power threshold and confinement of the I-mode in the EAST tokamak
文献类型：期刊论文
| 作者 | Liu, Y. J.1; Liu, Z. X.1; Liu, A. D.1; Zhou, C.1 ; Feng, X.1; Yang, Y.; Zhang, T.; Xia, T. Y.; Liu, H. Q.; Wu, M. Q.
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| 刊名 | NUCLEAR FUSION
 |
| 出版日期 | 2020-08-01 |
| 卷号 | 60 |
| ISSN号 | 0029-5515 |
| 关键词 | I-mode power threshold confinement |
| DOI | 10.1088/1741-4326/ab88e0 |
| 通讯作者 | Liu, Z. X.(zxliu316@ustc.edu.cn) |
| 英文摘要 | Sixty-five discharges have been confirmed as I-mode discharges after searching the EAST database from 2016 to 2018, and some additional I-mode discharges were obtained in 2019. The I-mode regime features no edge localized modes (ELMs), high energy confinement, and a steep temperature pedestal, while particle confinement remains at L-mode levels. The I-mode regime has been obtained over a small parameter space (B-T = 2.4 - 2.7 T, I-p = 0.4 - 0.6 MA, q(95) = 4 - 6) using a configuration with B x del B drift away from the active X-point. Most of the discharges in EAST are dominated by lower hybrid wave (LHW) heating. In addition, some are heated with both LHW and neutral beam injection (NBI) heating, and a few discharges are heated by NBI and electron cyclotron resonance heating (ECRH). Turbulence suppression in density perturbation has been defined as signaling the onset of the L-I transition. The power threshold of the I-mode is slightly larger than that of the 2008 ITPA scaling law of H-mode. The minimum L-I power threshold varies only weakly with B-T, and the power range for the I-mode increases with increasing B-T. The I-mode is superior to the L-mode in terms of energy confinement but is still slightly inferior to the H-mode under similar conditions, although the energy confinement time decreases more slowly with increasing heating power than it does in the typical H-mode case. NBI has some benefit for achieving higher confinement. The I-mode is very sensitive to the density near the edge. Under a constant high heating power, a small enhancement in the density will terminate the I-mode, sometimes leading to the I-H transition. |
| WOS关键词 | DENSITY PROFILE ; REFLECTOMETRY |
| 资助项目 | National Natural Science Foundation of China[11675211] ; National Natural Science Foundation of China[11975230] ; 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:000556707400001 |
| 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/334002/44985]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Liu, Z. X. |
| 作者单位 | 1.Univ Sci & Technol China, KTX Lab, Hefei 230026, Anhui, Peoples R China 2.Univ Sci & Technol China, Dept Engn & Appl Phys, Hefei 230026, Anhui, Peoples R China 3.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China 4.CEA, Inst Magnet Fus Res, F-13115 Saint Paul Lez Durance, France |
| 推荐引用方式 GB/T 7714 | Liu, Y. J.,Liu, Z. X.,Liu, A. D.,et al. Power threshold and confinement of the I-mode in the EAST tokamak[J]. NUCLEAR FUSION,2020,60. |
| APA | Liu, Y. J..,Liu, Z. X..,Liu, A. D..,Zhou, C..,Feng, X..,...&Liu, W. D..(2020).Power threshold and confinement of the I-mode in the EAST tokamak.NUCLEAR FUSION,60. |
| MLA | Liu, Y. J.,et al."Power threshold and confinement of the I-mode in the 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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