Characterization of density scanning experiments with NBI and LHW on EAST
文献类型：期刊论文
| 作者 | Zhong, Fubin1,2; Zhang, Tao1 ; Yang, Yao1; Wen, Fei1; Wu, Mingfu1,2; Huang, Jia1,2; Zhang, Xuexi1,2; Wu, Xiaohe1,2; Li, Gongshun1; Geng, Kangning3
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| 刊名 | AIP ADVANCES
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| 出版日期 | 2021-10-01 |
| 卷号 | 11 |
| DOI | 10.1063/5.0062690 |
| 通讯作者 | Yang, Yao(yangyao@ipp.ac.cn) |
| 英文摘要 | This paper presents the results of the density scanning experiment on the 2018 EAST campaign to study the effect of gas fueling on energy confinement of the ELMy H-mode. The experiment is carried out in a USN configuration, with neutral beam and lower hybrid wave heating and gas fueling, with the upper triangularity delta(up) similar to 0.47. The total stored energy, H-98, and beta(N) decrease with normalized density. Compared to the variations in temperature at the pedestal, the core temperature decreases more significantly for both T-e and T-i, leading to a large reduction in core pressure and an increase in the pedestal electron collisionality v*(e,ped). The increase in nu*(e,ped) could reduce the pedestal current and result in a decrease in the value of q in the core region. It was observed that the frequency of type I ELMs increases with density and the edge localized mode size becomes smaller at high density plasma. An m/n = 2/2 tearing mode was observed at the core of the plasma and can coexist with a sawtooth at low density plasma while this tearing mode disappeared at high gas fueling plasma. The reversal radius of the sawtooth (where q = 1) moves toward the magnetic axis as density increases. The degradation in performance with density may be due to two reasons: the more monotonic shear q profile and the weakening of the stabilizing effect of fast ions on ion temperature gradient modes at high density by D-2 gas fueling. It seems that there is a strong link between core transport and pedestal parameters which are influenced by gas fueling, resulting in a significant degradation of energy confinement. (C) 2021 Author(s). |
| WOS关键词 | ELMY H-MODES ; GOOD CONFINEMENT ; ASDEX UPGRADE ; PLASMAS ; PROFILE ; TRIANGULARITY ; REFLECTOMETRY ; PERFORMANCE ; ENERGY ; LIMIT |
| 资助项目 | National Key R& D Program of China[2017YFE0301205] ; National Key R& D Program of China[2019YFE03040002] ; National Key R& D Program of China[2019YFE03080200] ; National Natural Science Foundation of China[11875289] ; National Natural Science Foundation of China[11675211] ; National Natural Science Foundation of China[11805136] ; National Natural Science Foundation of China[12075284] ; National Natural Science Foundation of China[12175277] ; National Natural Science Foundation of China[11975271] ; Youth Science and Technology Talents Support Program (2020) by the Anhui Association for Science and Technology[RCTJ202009] |
| WOS研究方向 | Science & Technology - Other Topics ; Materials Science ; Physics |
| 语种 | 英语 |
| 出版者 | AIP Publishing |
| WOS记录号 | WOS:000754519200003 |
| 资助机构 | National Key R& D Program of China ; National Natural Science Foundation of China ; Youth Science and Technology Talents Support Program (2020) by the Anhui Association for Science and Technology |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/127566]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Yang, Yao |
| 作者单位 | 1.Chinese Acad Sci, Inst Plasma Phys, Hefei Inst Phys Sci, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Peoples R China 3.Shenzhen Univ, Coll Phys & Optoelect Engn, Shenzhen 518060, Peoples R China 4.Shenzhen Univ, Adv Energy Res Ctr, Shenzhen 518060, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhong, Fubin,Zhang, Tao,Yang, Yao,et al. Characterization of density scanning experiments with NBI and LHW on EAST[J]. AIP ADVANCES,2021,11. |
| APA | Zhong, Fubin.,Zhang, Tao.,Yang, Yao.,Wen, Fei.,Wu, Mingfu.,...&Gao, Xiang.(2021).Characterization of density scanning experiments with NBI and LHW on EAST.AIP ADVANCES,11. |
| MLA | Zhong, Fubin,et al."Characterization of density scanning experiments with NBI and LHW on EAST".AIP ADVANCES 11(2021). |
入库方式： OAI收割
来源：合肥物质科学研究院
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