Impact of divertor closure on edge plasma behavior in EAST H-mode plasmas
文献类型：期刊论文
| 作者 | Tao, Y. Q.1,2; Xu, G. S.2 ; Yang, Q. Q.2; Yan, N.2; Jia, G. Z.2; Meng, L. Y.1,2; Liu, S. C.2; Chen, L.2; Yu, Y. W.2; Gao, W.2
|
| 刊名 | PLASMA PHYSICS AND CONTROLLED FUSION
 |
| 出版日期 | 2021-06-01 |
| 卷号 | 63 |
| 关键词 | divertor closure strike point neutrals EAST SOLPS-ITER |
| ISSN号 | 0741-3335 |
| DOI | 10.1088/1361-6587/abf447 |
| 通讯作者 | Xu, G. S.(gsxu@ipp.ac.cn) ; Yang, Q. Q.(yangqq@ipp.ac.cn) |
| 英文摘要 | A series of H-mode discharges have been conducted in the EAST tokamak to study the effect of divertor closure on divertor neutral distribution and edge plasmas by scanning the location of the outer strike point. When the outer strike point moves close to the corner within similar to 4.5 cm, the gauge in upper sub-divertor shows that the neutral pressure increases, and the reciprocating probe at outer mid-plane indicates that electron temperature decreases and electron density increases in the scrape-off layer (SOL). In the meantime, the tungsten impurity concentration and radiation power in the main plasma decrease remarkably, while the main plasma density and stored energy increase slightly. SOLPS-ITER simulation without particle drifts is performed to better understand the impact of divertor closure. The simulation clearly demonstrates that a more closed divertor produces more neutrals around the corner with the increase of electron density and the decrease of electron temperature in the SOL, consistent with experimental results. Furthermore, more neutrals escape the divertor region and penetrate into the pedestal region, which induces more pedestal fuelling, increasing pedestal electron density. EAST will upgrade the lower divertor with a more closed geometry. These results provide important guidance for the upcoming upgrade. |
| 资助项目 | National Key Research and Development Program of China[2017YFE0301300] ; National Natural Science Foundation of China[12005257] ; National Natural Science Foundation of China[11905143] ; National Natural Science Foundation of China[11922513] ; CASHIPS Director's Fund[BJPY2019A01] ; CASHIPS Director's Fund[YZJJ2020QN13] ; Special Research Assistant Funding of CAS ; China Postdoctoral Science Foundation[2020M671913] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000642194000001 |
| 出版者 | IOP PUBLISHING LTD |
| 资助机构 | National Key Research and Development Program of China ; National Natural Science Foundation of China ; CASHIPS Director's Fund ; Special Research Assistant Funding of CAS ; China Postdoctoral Science Foundation |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/121759]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Xu, G. S.; Yang, Q. Q. |
| 作者单位 | 1.Univ Sci & Technol China, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China |
| 推荐引用方式 GB/T 7714 | Tao, Y. Q.,Xu, G. S.,Yang, Q. Q.,et al. Impact of divertor closure on edge plasma behavior in EAST H-mode plasmas[J]. PLASMA PHYSICS AND CONTROLLED FUSION,2021,63. |
| APA | Tao, Y. Q..,Xu, G. S..,Yang, Q. Q..,Yan, N..,Jia, G. Z..,...&Gao, S. L..(2021).Impact of divertor closure on edge plasma behavior in EAST H-mode plasmas.PLASMA PHYSICS AND CONTROLLED FUSION,63. |
| MLA | Tao, Y. Q.,et al."Impact of divertor closure on edge plasma behavior in EAST H-mode plasmas".PLASMA PHYSICS AND CONTROLLED FUSION 63(2021). |
入库方式： OAI收割
来源：合肥物质科学研究院
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。