Statistical study of particle flux footprint widths with tungsten divertor in EAST | |
Liu,X2,3,4,5; Naulin,V3; Xu,J C2; Deng,G Z2; Rasmussen,J J3; Liu,J B2; Nielsen,A H3; Goldston,R J1; Maingi,R1; Liu,Y2 | |
刊名 | Plasma Physics and Controlled Fusion |
2019-02-15 | |
卷号 | 61期号:4页码:1-14 |
关键词 | particle flux footprint widths tungsten divertor scrape-off layer EAST |
ISSN号 | 0741-3335 |
DOI | 10.1088/1361-6587/aaf762 |
英文摘要 | Abstract The study of the divertor heat flux is of great importance for the operation of ITER and future fusion devices. In this paper, the behaviors of the widths of the particle flux footprints on the tungsten divertor in EAST have been statistically studied for the first time. A large number of divertor Langmuir probe (Div-LP) data from EAST general discharges in the 2016 campaign have been stepwise selected and analyzed for both L- and H-mode plasmas. It is found that the scaling dependences on poloidal magnetic field for the particle flux fall-off width at the inner tungsten divertor agree well with those at the outer graphite divertor in both L- and H-mode plasmas. The difficulty of extracting reliable footprint widths has been overcome by fitting data from two Div-LP arrays distributed toroidally. The nonlinear regressions of the particle flux fall-off width and particle flux spreading width at the inner tungsten divertor in H-mode plasmas have then been performed. A negative dependence on the plasma stored energy is found in the regression of the particle flux fall-off width and the exponent of the stored energy in the regression is consistent with previous experimental studies. The comparison between the particle flux fall-off width at the tungsten divertor with that at the graphite divertor indicates that statistically the divertor material and the direction of the toroidal magnetic field seem to have no significant influence on the particle flux fall-off width at the inner divertor. In addition, the similar particle flux fall-off width in L- and H-mode plasmas and the in–out asymmetry of the particle flux fall-off width at the graphite divertor have also been shown. |
语种 | 英语 |
出版者 | IOP Publishing |
WOS记录号 | IOP:0741-3335-61-4-AAF762 |
内容类型 | 期刊论文 |
源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/41987] |
专题 | 合肥物质科学研究院_中科院等离子体物理研究所 |
作者单位 | 1.Princeton Plasma Physics Laboratory, Princeton, NJ 08543, United States of America 2.Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China 3.Department of Physics, Technical University of Denmark, Kongens Lyngby, DK-2800, Denmark 4.Sino-Danish College, University of Chinese Academy of Sciences, Beijing 101408, People’s Republic of China 5.Sino-Danish Center for Education and Research, Beijing 101408, People’s Republic of China |
推荐引用方式 GB/T 7714 | Liu,X,Naulin,V,Xu,J C,et al. Statistical study of particle flux footprint widths with tungsten divertor in EAST[J]. Plasma Physics and Controlled Fusion,2019,61(4):1-14. |
APA | Liu,X.,Naulin,V.,Xu,J C.,Deng,G Z.,Rasmussen,J J.,...&Li,J.(2019).Statistical study of particle flux footprint widths with tungsten divertor in EAST.Plasma Physics and Controlled Fusion,61(4),1-14. |
MLA | Liu,X,et al."Statistical study of particle flux footprint widths with tungsten divertor in EAST".Plasma Physics and Controlled Fusion 61.4(2019):1-14. |
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