Effects of divertor geometry on detachment and core plasma performance with impurity seeding in EAST
文献类型：期刊论文
| 作者 | Meng, L. Y.1; Wang, L.1 ; Liu, J. B.1; Li, K. D.1; Lin, X.1; Liu, X. J.1; Jia, G. Z.1; Guo, J.1; He, T.1; Yu, L.1
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| 刊名 | NUCLEAR FUSION
 |
| 出版日期 | 2024-12-01 |
| 卷号 | 64 |
| 关键词 | divertor geometry detachment compatibility EAST |
| ISSN号 | 0029-5515 |
| DOI | 10.1088/1741-4326/ad80aa |
| 通讯作者 | Wang, L.(lwang@ipp.ac.cn) ; Liu, J. B.(jianbinliu@ipp.ac.cn) |
| 英文摘要 | Divertor detachment operation compatible with the core plasma is an effective method to alleviate the steady-state heat flux approaching the divertor target; this scheme will be adopted by high-performance tokamaks in the future, such as International Thermonuclear Experimental Reactor (ITER). Currently, two ITER-like tungsten divertors with different geometries have been installed at the top and bottom of Experimental Advanced Superconducting Tokamak (EAST), providing conditions for the present study to investigate the effect of divertor geometry on the compatibility between detachment and core plasma. Recent H-mode experiments show that the electron temperature and heat flux of the outer target of the lower divertor decrease lower than those of the upper divertor after similar amounts of impurity are truly injected into the plasma. SOLPS simulations further prove that the closed lower divertor with a 'corner slot' structure is beneficial for trapping impurity and deuterium particles, thereby increasing momentum and energy losses. For the upper single-null discharges, the divertor electron temperature can be relatively reduced by increasing impurity seeding, but it is also easy to decrease the plasma stored energy and even lead to an H-L back transition. In addition, statistical data on discharges with impurity seeding show that the proportion of detachment discharges achieved by using the closed divertor is higher than that achieved by using the open divertor. The discharges with the closed divertor after detachment have less damage to the core plasma performance than those with the open divertor, irrespective of whether neon or argon seeding is employed. This research will support long-pulse detachment operation in EAST and provide a reference for other tokamaks in divertor design. |
| WOS关键词 | POWER |
| 资助项目 | National Natural Science Foundation of China[12305256] ; National Natural Science Foundation of China[12275312] ; National Natural Science Foundation of China[12005004] ; Special Research Assistant Funding of CAS ; HFIPS Director's Fund[YZJJ2023QN23] ; HFIPS Director's Fund[BJPY2023A05] ; National Key R&D Program of China[2022YFE03030001] ; National Key R&D Program of China[2022YFE03010001] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001332099500001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | National Natural Science Foundation of China ; Special Research Assistant Funding of CAS ; HFIPS Director's Fund ; National Key R&D Program of China |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/134609]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Wang, L.; Liu, J. B. |
| 作者单位 | 1.Chinese Acad Sci, Inst Plasma Phys, Hefei Inst Phys Sci, Hefei 230031, Peoples R China 2.Anhui Univ Sci & Technol, Huainan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Meng, L. Y.,Wang, L.,Liu, J. B.,et al. Effects of divertor geometry on detachment and core plasma performance with impurity seeding in EAST[J]. NUCLEAR FUSION,2024,64. |
| APA | Meng, L. Y..,Wang, L..,Liu, J. B..,Li, K. D..,Lin, X..,...&Wan, B. N..(2024).Effects of divertor geometry on detachment and core plasma performance with impurity seeding in EAST.NUCLEAR FUSION,64. |
| MLA | Meng, L. Y.,et al."Effects of divertor geometry on detachment and core plasma performance with impurity seeding in EAST".NUCLEAR FUSION 64(2024). |
入库方式： OAI收割
来源：合肥物质科学研究院
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