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

doi:10.1088/1741-4326/ab443a

	Improved high-performance fully non-inductive discharge by optimizing the fast-ion confinement on EAST
	Huang, J.2; Qian, J. P.2; Garofalo, A. M.3; Gong, X. Z.2; Wu, C. R.2; Chang, J. F.2; Zhang, J.2; Du, H. F.2; Wu, M. Q.2; Hao, B. L.2
刊名	NUCLEAR FUSION
	2020
卷号	60
关键词	magnetic fusion fully non-inductive tokamak fast-ion behavior neutral beam
ISSN号	0029-5515
DOI	10.1088/1741-4326/ab443a
通讯作者	Huang, J.(juan.huang@ipp.ac.cn)
英文摘要	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.
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]
WOS研究方向	Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000529972800002
资助机构	National Natural Science Foundation of China ; National Magnetic Confinement Fusion Science Program of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/103437]
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.Tech Univ Denmark, Dept Phys, Lyngby, Denmark 2.Chinese Acad Sci, Inst Plasma Phys, Hefei, Anhui, Peoples R China 3.Gen Atom, San Diego, CA USA 4.East China Univ Sci & Technol, Shanghai, Peoples R China
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).