Investigation of the double peak in the visible-light range of radiative divertor emission profiles on the EAST tokamak
文献类型：期刊论文
| 作者 | Guo, Jin2; Lu, Zhiyuan1,2; Jia, Guozhang1 ; Ruan, Xinglei2; Xu, Yuchen2; Mao, Shifeng2; Yang, Jianhua1; Wang, Yumin1; Meng, Lingyi1; Yang, Qingquan1
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| 刊名 | PLASMA PHYSICS AND CONTROLLED FUSION
 |
| 出版日期 | 2021-12-01 |
| 卷号 | 63 |
| ISSN号 | 0741-3335 |
| 关键词 | impurity radiation visible-light imaging tungsten divertor carbon migration SOLPS-ITER DIVIMP EAST |
| DOI | 10.1088/1361-6587/ac2afa |
| 通讯作者 | Mao, Shifeng(sfmao@ustc.edu.cn) ; Ye, Minyou(yemy@ustc.edu.cn) |
| 英文摘要 | The double-peaked emission profile has been identified by tomographic reconstruction from the signals of the tangentially viewing visible-light imaging system on EAST. In the upper-single-null discharge with neon seeding, two light emission peaks are located near the X-point and in the high-field-side (HFS) scrape-off layer (SOL) on the poloidal cross-section while the outer divertor target is still attached. The double-peaked emission phenomenon has not been reported for other tokamaks. In particular, the existence of the emission peak near the X-point under the attached condition is unexpected because it is usually an indication of X-point multifaceted asymmetric radiation from the edge under the detached condition. Therefore, it is of fundamental importance for the divertor physics to make clear the mechanism of the double-peaked emission phenomenon. The computational simulations with SOLPS-ITER and DIVIMP are performed in this work. The simulated results show the contribution of W impurity to the double-peaked emission profile is negligible with the upper tungsten divertor. Considering the existence of a lower carbon divertor in EAST, the influence of the possible deposition of the carbon on the upper divertor is further investigated. The simulating CIII (465 nm) and CII (514 nm) emissions, which make a significant contribution to the visible-light emission in channel B (blue) and G (green), respectively, are found to be similar tothe experimental results. The emission peak near the X-point is related to the carbon deposited on the dome, while that in the HFS SOL is contributed by the carbon on the inner baffle. The ionization source of the carbon impurity and the net force pointing to the X-point are analyzed to understand the concentration of the carbon impurity near the X-point, which in turn causes the emission peak. |
| WOS关键词 | ASDEX-UPGRADE ; TRANSPORT ; TUNGSTEN ; POWER ; IMPURITIES ; FORMULAS ; PLASMAS ; EROSION |
| 资助项目 | National Key Research and Development Program of China[2018YFE0302101] ; National Natural Science Foundation of China[11975232] ; Collaborative Innovation Program of Hefei Science Center, CAS[2020HSC-CIP015] ; Supercomputing Center of the University of Science and Technology of China |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| 出版者 | IOP Publishing Ltd |
| WOS记录号 | WOS:000739529400001 |
| 资助机构 | National Key Research and Development Program of China ; National Natural Science Foundation of China ; Collaborative Innovation Program of Hefei Science Center, CAS ; Supercomputing Center of the University of Science and Technology of China |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/127245]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Mao, Shifeng; Ye, Minyou |
| 作者单位 | 1.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Anhui, Peoples R China 2.Univ Sci & Technol China, Sch Nucl Sci & Technol, 96 Jinzhai Rd, Hefei 230026, Anhui, Peoples R China |
| 推荐引用方式 GB/T 7714 | Guo, Jin,Lu, Zhiyuan,Jia, Guozhang,et al. Investigation of the double peak in the visible-light range of radiative divertor emission profiles on the EAST tokamak[J]. PLASMA PHYSICS AND CONTROLLED FUSION,2021,63. |
| APA | Guo, Jin.,Lu, Zhiyuan.,Jia, Guozhang.,Ruan, Xinglei.,Xu, Yuchen.,...&Ye, Minyou.(2021).Investigation of the double peak in the visible-light range of radiative divertor emission profiles on the EAST tokamak.PLASMA PHYSICS AND CONTROLLED FUSION,63. |
| MLA | Guo, Jin,et al."Investigation of the double peak in the visible-light range of radiative divertor emission profiles on the EAST tokamak".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
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