Effect of divertor plasma-facing materials and drift on the power decay width in the scrape-off layer and divertor on EAST
文献类型:期刊论文
作者 | Zhang, Chen1; Sang, Chaofeng1; Wang, Liang2; Zhang, Yanjie1; Li, Nami1; Wang, Dezhen1 |
刊名 | NUCLEAR FUSION |
出版日期 | 2022-07-01 |
卷号 | 62 |
ISSN号 | 0029-5515 |
关键词 | power decay width Gauss width divertor SOLPS-ITER |
DOI | 10.1088/1741-4326/ac65a1 |
通讯作者 | Sang, Chaofeng(sang@dlut.edu.cn) |
英文摘要 | The narrow power decay width lambda(q) may lead to high heat flux density to the divertor target, which is one of the most severe challenges for future fusion devices. EAST has upgraded its lower graphite (C) divertor to a tungsten (W) one, and it is important to reveal the dependence of lambda(q) on the divertor condition. In the present work, SOLPS-ITER is applied to estimate the effect of various conditions [C/W plasma facing material (PFM), with/without drift] on lambda(q) of EAST in attached divertor regime. The simulation results confirm that the power decay width of the upstream lambda(q,SOL), divertor lambda(q,)(OT), and private-flux region (PFR) S-OT all depend on the PFMs and drifts. However, the effect of PFM on lambda(q,SOL), is slight, while it has a significant influence on lambda(q,)(OT) and S-OT. In the upstream, positive correlation between lambda(q,SOL), and v(SOL)* is obtained, and the simulation is in qualitative agreement with the two-point model. Both lambda(q,SOL) and lambda(q,OT) in without drift case are larger than that of with drift case. The regression of simulation results is obtained, showing a strong positive correlation between SOL collisionality v(SOL)* power radiation friction in divertor region f(rad,)(OD) and lambda(q,)(OT). Thus, the C PFM with intrinsic impurity has the largest lambda(q,)(OT). In the PFR, S-OT with drift is smaller than that of without drift. Moreover, the combination of more D atoms accumulation and stronger E-p x B drift lead to larger S-OT in W PFM case than that of C PFM case. |
资助项目 | National Key R&D Program of China[2017YFE0301206] ; National Key R&D Program of China[2017YFA0402500] ; National Key R&D Program of China[2017YFE0300402] ; National Key R&D Program of China[2018YFE0301101] ; National Natural Science Foundation of China[12122503] ; National Natural Science Foundation of China[12011530053] ; Fundamental Research Funds for the Central Universities[DUT21GJ204] |
WOS研究方向 | Physics |
语种 | 英语 |
出版者 | IOP Publishing Ltd |
WOS记录号 | WOS:000787083800001 |
资助机构 | National Key R&D Program of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities |
源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/131482] |
专题 | 中国科学院合肥物质科学研究院 |
通讯作者 | Sang, Chaofeng |
作者单位 | 1.Dalian Univ Technol, Key Lab Mat Modificat Laser Ion & Electron Beams, Minist Educ, Sch Phys, Dalian 116024, Peoples R China 2.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China |
推荐引用方式 GB/T 7714 | Zhang, Chen,Sang, Chaofeng,Wang, Liang,et al. Effect of divertor plasma-facing materials and drift on the power decay width in the scrape-off layer and divertor on EAST[J]. NUCLEAR FUSION,2022,62. |
APA | Zhang, Chen,Sang, Chaofeng,Wang, Liang,Zhang, Yanjie,Li, Nami,&Wang, Dezhen.(2022).Effect of divertor plasma-facing materials and drift on the power decay width in the scrape-off layer and divertor on EAST.NUCLEAR FUSION,62. |
MLA | Zhang, Chen,et al."Effect of divertor plasma-facing materials and drift on the power decay width in the scrape-off layer and divertor on EAST".NUCLEAR FUSION 62(2022). |
入库方式: OAI收割
来源:合肥物质科学研究院
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