Advances in the long-pulse steady-state high beta H-mode scenario with active controls of divertor heat and particle fluxes in EAST

doi:10.1088/1741-4326/ac2993

	Advances in the long-pulse steady-state high beta H-mode scenario with active controls of divertor heat and particle fluxes in EAST
	Wan, B. N.1; Gong, X. Z.1; Liang, Y.1,2; Xiang, N.1; Xu, G. S.1; Sun, Y.1; Wang, L.1; Qian, J. P.1; Liu, H. Q.1; Zhang, B.1
刊名	NUCLEAR FUSION
	2022-04-01
卷号	62
关键词	EAST tokamak high beta H mode scenario He plasma ELM suppression tungsten divertor detachment
ISSN号	0029-5515
DOI	10.1088/1741-4326/ac2993
通讯作者	Wan, B. N.(bnwan@ipp.ac.cn)
英文摘要	Since the last IAEA-Fusion Energy Conference, the Experimental Advanced Superconducting Tokamak (EAST) research program has been, in support of ITER and CFETR, focused on development in terms of the long-pulse steady-state (fully noninductive) high beta H-mode scenario with active controls of the stationary and transient divertor heat and particle fluxes. The operational domain of the steady-state H-mode plasma scenario has been significantly extended with ITER-like tungsten mono-block divertor, plasma control and heating schemes. EAST has achieved several important milestones in the development of high beta (p) H-mode scenario and its key physics and technologies. A 60 s-scale long-pulse steady-state high beta (p) H-mode discharge with the major normalized plasma parameters similar to the designed performance of the CFETR 1 GW fusion power operation scenario has been successfully established and sustained by pure RF heating and current drive. Several feedback control schemes have been developed for a sustained detachment with good core confinement. This includes control of the total radiation power, target electron temperature, and particle flux measured using divertor Langmuir probes or a combination of the control of target electron temperature and AXUV radiation near the X point. The detachment feedback control schemes have been integrated with small-ELM regimes and high beta (p) scenario via neon seeding, enabling a core and edge compatible integrated high-beta scenario applicable to long-pulse operations. ELM suppression has been achieved using various methods, including resonant magnetic perturbations and impurity seeding. Full suppression of ELMs by using n = 4 RMPs has been demonstrated for ITER for the first time in low input torque plasmas in EAST. EAST has been operated with helium to support the ITER research requirements for the first time. For a long-pulse, high bootstrap current fraction operation, a new lower tungsten divertor with active water-cooling has been installed, along with improvements in the heating and current drive capability.
资助项目	National Key R&D Program of China[2017YFE0301100] ; National Key R&D Program of China[2017YFE0301300] ; National Key R&D Program of China[2017YFE0301205] ; National Key R&D Program of China[2018YFE0303104] ; National Magnetic Confinement Fusion Energy RD Program[2019YFE03030000] ; National Magnetic Confinement Fusion Energy RD Program[2019YFE03040000] ; National Magnetic Confinement Fusion Energy RD Program[2019YFE03070000] ; National Magnetic Confinement Fusion Energy RD Program[2019YFE03010002] ; National Magnetic Confinement Fusion Energy RD Program[2019YFE03020004] ; National Key Research and Development Program of China[2017YFA0402500]
WOS关键词	OPERATION ; SUPPORT ; ITER ; ELM
WOS研究方向	Physics
语种	英语
出版者	IOP Publishing Ltd
WOS记录号	WOS:000752602800001
资助机构	National Key R&D Program of China ; National Magnetic Confinement Fusion Energy RD Program ; National Key Research and Development Program of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/127647]
专题	中国科学院合肥物质科学研究院
通讯作者	Wan, B. N.
作者单位	1.Chinese Acad Sci, Inst Plasma Phys, Hefei, Peoples R China 2.Forschungszentrum Julich, Inst Energy & Climate Res Plasma Phys IEK 4, Assoc EURATOM FZJ, Julich, Germany 3.Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA 4.Gen Atom, San Diego, CA USA
推荐引用方式 GB/T 7714	Wan, B. N.,Gong, X. Z.,Liang, Y.,et al. Advances in the long-pulse steady-state high beta H-mode scenario with active controls of divertor heat and particle fluxes in EAST[J]. NUCLEAR FUSION,2022,62.
APA	Wan, B. N..,Gong, X. Z..,Liang, Y..,Xiang, N..,Xu, G. S..,...&Yang, Q. Q..(2022).Advances in the long-pulse steady-state high beta H-mode scenario with active controls of divertor heat and particle fluxes in EAST.NUCLEAR FUSION,62.
MLA	Wan, B. N.,et al."Advances in the long-pulse steady-state high beta H-mode scenario with active controls of divertor heat and particle fluxes in EAST".NUCLEAR FUSION 62(2022).