Modelling study of divertor W leakage for different divertor conditions with Ne seeding in EAST tokamak
文献类型：期刊论文
| 作者 | Xu, Guoliang2; Wang, Hui2; Ding, Rui2 ; Si, Hang2; Jia, Guozhang2; Guo, Jin2; Xie, Hai2; Yan, Rong2; Hai, Ran1; Zhu, Dahuan2
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| 刊名 | NUCLEAR FUSION
 |
| 出版日期 | 2024-12-01 |
| 卷号 | 64 |
| 关键词 | divertor tungsten impurity transport E x B drifts EAST |
| ISSN号 | 0029-5515 |
| DOI | 10.1088/1741-4326/ad8243 |
| 通讯作者 | Wang, Hui(hui.wang1@ipp.ac.cn) ; Ding, Rui(rding@ipp.ac.cn) |
| 英文摘要 | Sequential SOLPS-ITER and DIVIMP simulations are carried out for tungsten (W) edge transport during neon (Ne) injection in EAST, elucidating the pathway of W impurity leakage from the divertor to the core plasma under different dissipative divertor conditions. Divertor conditions from low-recycling to detachment are generated by modulating the Ne injection rate in the SOLPS simulation. With the drift velocities incorporated in DIVIMP, W transport under the drift effect is investigated. For low-density L-mode plasma conditions with favorable Bt direction, the majority of W source originates from the outer divertor target and leaks upstream through the near-SOL Ex B drift reversed region at both inner and outer divertors. The Ex B drift is demonstrated to have a significant effect on W leakage and the effect diminishes with the increase of Ne injection rate. Compared to the D2 injection cases, Ne injection helps to achieve a strong dissipative divertor condition at a much lower plasma density, resulting in a higher W leakage ability due to the smaller friction with the background plasma. For Ne injection cases under high-density H-mode conditions, W leaks mostly through the outer divertor region while the inner divertor is fully detached. Compared to the L-mode cases, the shorter power decay lengths in the scrap-off layer (SOL) of the H-mode cases result in smaller parallel Ex B drift velocities especially in the middle and far SOL region. With the increase of the Ne injection rate, the decrease of the Ex B drift in the middle SOL leads to a wider near-separatrix W leakage path. Therefore, a worse divertor W screening is expected, which is consistent with the previous published experimental observations (Ding et al 2022 Nucl. Mater. Energy 33 101250). |
| WOS关键词 | ITER-LIKE WALL ; DIII-D ; ASDEX UPGRADE ; PLASMAS |
| 资助项目 | National Natural Science Foundation of China[12375232] ; National Natural Science Foundation of China[12261131496] ; National Natural Science Foundation of China[12022511] ; National Natural Science Foundation of China[12075279] ; Key Research Program of Frontier Sciences of CAS[ZDBS-LY-SLH010] ; National MCF Energy R&D Program of China[2022YFE03180100] ; National MCF Energy R&D Program of China[2022YFE03030000] ; National MCF Energy R&D Program of China[2019YFE03080100] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001332108100001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | National Natural Science Foundation of China ; Key Research Program of Frontier Sciences of CAS ; National MCF Energy R&D Program of China |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/134563]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Wang, Hui; Ding, Rui |
| 作者单位 | 1.Dalian Univ Technol, Sch Phys, Key Lab Mat Modificat Laser Ion & Electron Beams, Chinese Minist Educ, Dalian, Peoples R China 2.Chinese Acad Sci, Inst Plasma Phys, Hefei Inst Phys Sci, Hefei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Guoliang,Wang, Hui,Ding, Rui,et al. Modelling study of divertor W leakage for different divertor conditions with Ne seeding in EAST tokamak[J]. NUCLEAR FUSION,2024,64. |
| APA | Xu, Guoliang.,Wang, Hui.,Ding, Rui.,Si, Hang.,Jia, Guozhang.,...&Chen, Junling.(2024).Modelling study of divertor W leakage for different divertor conditions with Ne seeding in EAST tokamak.NUCLEAR FUSION,64. |
| MLA | Xu, Guoliang,et al."Modelling study of divertor W leakage for different divertor conditions with Ne seeding in EAST tokamak".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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