Improved high-performance fully non-inductive discharge by optimizing the fast-ion confinement on EAST

doi:10.1088/1741-4326/ab443a

HFCAS OpenIR

	Improved high-performance fully non-inductive discharge by optimizing the fast-ion confinement on EAST
	Huang, J.1 ; Qian, J. P.1; Garofalo, A. M.2; Gong, X. Z.1; Wu, C. R.1; Chang, J. F.1; Zhang, J.1 ; Du, H. F.1; Wu, M. Q.1; Hao, B. L.1; Yu, L. M.3; Zhang, X. M.3; Madsen, B.4; Salewski, M.4; Liang, L. Z.1; Li, J.1; Ding, S. Y.1; Zhong, G. Q.1; Chen, J. L.1; Zhu, X.1; Zeng, L.1; Li, E. Z.1; Zhang, B.1 ; Xu, Z.1; Su, J. X.1; Gao, W.1 ; Chen, Y. J.1; Li, Y. Y.1; Liu, H.1; Lyu, B.1; Zang, Q.1 ; Wan, B.1
	2020
发表期刊	NUCLEAR FUSION
ISSN	0029-5515
通讯作者	Huang, J.(juan.huang@ipp.ac.cn)
摘要	The attainment of long-pulse, high-performance, fully non-inductive plasma is one of the major scientific objectives of EAST, using the ITER-like tungsten upper divertor. Understanding and optimizing the fast-ion behaviors is the critical issue to extending the performance of EAST. Recently, using both neutral beam injection (NBI) and radio frequency (RF; low hybrid, electron cyclotron, and ion cyclotron) heating, fully non-inductive high-beta(P) scenarios with extension of fusion performance at high density and low rotation have been achieved, with beta(P) up to 2.5, beta(N) up to 2.0, H-98y2 > 1.1, and bootstrap current fraction (f(BS)) up to 50%. For previous long-pulse H-mode plasma at medium density, when NBI is added into RF plasma, beta(p) is increased from 1.2 to 2.0 compared with RF-only discharges. In fact, f(BS) for both discharges is nearly the same, at similar to 22%. Analysis shows that the increase in beta(p) is mostly due to fast ions which do not contribute significantly to the neoclassical bootstrap current. Thus, to obtain high-performance plasmas with improved bootstrap current fraction, key parameters (e.g. density, beam energy, etc.) must be further optimized. Experimental results show that high density improves bootstrap fraction also by reducing fast-ion slowing-down time and loss. The lower beam energy also mitigates fast-ion loss, which is better for heating and CD performance. The extension of high-performance, fully non-inductive experiments on EAST at high density and zero/low NBI torque can potentially offer unique contributions towards ITER and CFETR.
关键词	magnetic fusion fully non-inductive tokamak fast-ion behavior neutral beam
DOI	10.1088/1741-4326/ab443a
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[11575249] ; National Magnetic Confinement Fusion Science Program of China[2015GB110005] ; National Magnetic Confinement Fusion Science Program of China[2014GB109004] ; National Magnetic Confinement Fusion Science Program of China[2015GB102000]
项目资助者	National Natural Science Foundation of China ; National Magnetic Confinement Fusion Science Program of China
WOS研究方向	Physics
WOS类目	Physics, Fluids & Plasmas
WOS记录号	WOS:000529972800002
出版者	IOP PUBLISHING LTD
引用统计	被引频次：15[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.hfcas.ac.cn:8080/handle/334002/103438
专题	中国科学院合肥物质科学研究院
通讯作者	Huang, J.
作者单位	1.Chinese Acad Sci, Inst Plasma Phys, Hefei, Anhui, Peoples R China 2.Gen Atom, San Diego, CA USA 3.East China Univ Sci & Technol, Shanghai, Peoples R China 4.Tech Univ Denmark, Dept Phys, Lyngby, Denmark
第一作者单位	中科院等离子体物理研究所
通讯作者单位	中科院等离子体物理研究所
推荐引用方式 GB/T 7714	Huang, J.,Qian, J. P.,Garofalo, A. M.,et al. Improved high-performance fully non-inductive discharge by optimizing the fast-ion confinement on EAST[J]. NUCLEAR FUSION,2020,60.
APA	Huang, J..,Qian, J. P..,Garofalo, A. M..,Gong, X. Z..,Wu, C. R..,...&Wan, B..(2020).Improved high-performance fully non-inductive discharge by optimizing the fast-ion confinement on EAST.NUCLEAR FUSION,60.
MLA	Huang, J.,et al."Improved high-performance fully non-inductive discharge by optimizing the fast-ion confinement on EAST".NUCLEAR FUSION 60(2020).