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Divertor detachment with neon seeding in grassy-ELM H-mode in EAST

文献类型：期刊论文

作者Li, Kedong1,2; Xu, Guosheng1; Yang, Zhongshi1; Wang, Liang1; Yuan, Qiping1; Liu, Jianbin1; Wang, Huiqian3; Guo, Houyang3; Eldon, David3; Hyatt, Alan3
刊名PLASMA PHYSICS AND CONTROLLED FUSION
出版日期2020-09-01
卷号62
关键词detachment grassy ELMs neon seeding
ISSN号0741-3335
DOI10.1088/1361-6587/aba859
通讯作者Xu, Guosheng(gsxu@ipp.ac.cn)
英文摘要Simultaneous control of the transient heat load induced by the large-amplitude edge-localized modes (ELMs) and the time-averaged heat and particle fluxes to the divertor targets is a critical issue for the steady-state operation of a future tokamak fusion reactor. The combination of divertor detachment and grassy-ELM regime provides a candidate solution to this issue. The strong particle exhaust capability of the grassy-ELM regime greatly facilitates the achievement of steady-state operation of a detached plasma with divertor impurity seeding. Stable complete detachment at inner target and partial detachment at outer target in the grassy-ELM regime have been achieved with seeding of 5% neon (Ne) and 95% D(2)mixture since 2018 in the EAST superconducting tokamak with ITER-like tungsten monoblock upper divertor. The peak ion fluxes (Gamma(ion)) on the upper outer and inner divertor targets were reduced by 55% and 92%, respectively. However, it was accompanied by confinement degradation with 18% reduction in the plasma stored energyW(MHD). In contrast, partial detachment on the upper outer divertor target with confinement improvement has been achieved with the power across the separatrix (P-sep) around the H-mode threshold power. In addition, at relatively lowerq(95)(similar to 5.7) with unfavorableB(t)direction, Ne seeding leads to a transition from mixed (large/small) ELM regime into grassy-ELM regime with significantly increased ELM frequency, which extends the accessible parameter range of the grassy-ELM regime towards lowerq(95).
WOS关键词ALCATOR C-MOD ; GOOD CONFINEMENT ; DENSITY PROFILE ; ASDEX UPGRADE ; JET ; REFLECTOMETER ; DISCHARGES ; PHYSICS ; BALANCE ; POWER
资助项目National Key Research & Development Program of China[2018YFE0303103] ; National Key Research & Development Program of China[2017YFE0301300] ; National Natural Science Foundation of China[U19A20113] ; National Natural Science Foundation of China[11875287] ; National Natural Science Foundation of China[11575242] ; National Natural Science Foundation of China[11705233] ; Chinese Scholarship Council[201706340013] ; Key Research Program of Frontier Sciences, CAS[QYZDB-SSW-SLH001] ; AHNSF[1808085J07] ; Users with Excellence Project of Hefei Science Center CAS[2018HSC-UE008]
WOS研究方向Physics
语种英语
WOS记录号WOS:000561557300001
出版者IOP PUBLISHING LTD
资助机构National Key Research & Development Program of China ; National Natural Science Foundation of China ; Chinese Scholarship Council ; Key Research Program of Frontier Sciences, CAS ; AHNSF ; Users with Excellence Project of Hefei Science Center CAS
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/43117]  
专题中国科学院合肥物质科学研究院
通讯作者Xu, Guosheng
作者单位1.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
2.Univ Sci & Technol China, Grad Sch, Sci Isl Branch, Hefei 230031, Peoples R China
3.Gen Atom, POB 85608, San Diego, CA 92186 USA
4.Anhui Univ Sci & Technol, Sch Mech Engn, Huainan 232001, Peoples R China
推荐引用方式
GB/T 7714		 Li, Kedong,Xu, Guosheng,Yang, Zhongshi,et al. Divertor detachment with neon seeding in grassy-ELM H-mode in EAST[J]. PLASMA PHYSICS AND CONTROLLED FUSION,2020,62.
APA Li, Kedong.,Xu, Guosheng.,Yang, Zhongshi.,Wang, Liang.,Yuan, Qiping.,...&Luo, Guang-Nan.(2020).Divertor detachment with neon seeding in grassy-ELM H-mode in EAST.PLASMA PHYSICS AND CONTROLLED FUSION,62.
MLA Li, Kedong,et al."Divertor detachment with neon seeding in grassy-ELM H-mode in EAST".PLASMA PHYSICS AND CONTROLLED FUSION 62(2020).

入库方式： OAI收割

来源：合肥物质科学研究院

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