Characterization of density scanning experiments with NBI and LHW on EAST

doi:10.1063/5.0062690

	Characterization of density scanning experiments with NBI and LHW on EAST
	Zhong, Fubin 1,2; Zhang, Tao 1; Yang, Yao 1; Wen, Fei 1; Wu, Mingfu 1,2; Huang, Jia 1,2; Zhang, Xuexi 1,2; Wu, Xiaohe 1,2; Li, Gongshun 1; Geng, Kangning 3
刊名	AIP ADVANCES
	2021-10-01
卷号	11
DOI	10.1063/5.0062690
通讯作者	Yang, Yao(yangyao@ipp.ac.cn)
英文摘要	This paper presents the results of the density scanning experiment on the 2018 EAST campaign to study the effect of gas fueling on energy confinement of the ELMy H-mode. The experiment is carried out in a USN configuration, with neutral beam and lower hybrid wave heating and gas fueling, with the upper triangularity delta(up) similar to 0.47. The total stored energy, H-98, and beta(N) decrease with normalized density. Compared to the variations in temperature at the pedestal, the core temperature decreases more significantly for both T-e and T-i, leading to a large reduction in core pressure and an increase in the pedestal electron collisionality v(e,ped). The increase in nu(e,ped) could reduce the pedestal current and result in a decrease in the value of q in the core region. It was observed that the frequency of type I ELMs increases with density and the edge localized mode size becomes smaller at high density plasma. An m/n = 2/2 tearing mode was observed at the core of the plasma and can coexist with a sawtooth at low density plasma while this tearing mode disappeared at high gas fueling plasma. The reversal radius of the sawtooth (where q = 1) moves toward the magnetic axis as density increases. The degradation in performance with density may be due to two reasons: the more monotonic shear q profile and the weakening of the stabilizing effect of fast ions on ion temperature gradient modes at high density by D-2 gas fueling. It seems that there is a strong link between core transport and pedestal parameters which are influenced by gas fueling, resulting in a significant degradation of energy confinement. (C) 2021 Author(s).
资助项目	National Key R& D Program of China[2017YFE0301205] ; National Key R& D Program of China[2019YFE03040002] ; National Key R& D Program of China[2019YFE03080200] ; National Natural Science Foundation of China[11875289] ; National Natural Science Foundation of China[11675211] ; National Natural Science Foundation of China[11805136] ; National Natural Science Foundation of China[12075284] ; National Natural Science Foundation of China[12175277] ; National Natural Science Foundation of China[11975271] ; Youth Science and Technology Talents Support Program (2020) by the Anhui Association for Science and Technology[RCTJ202009]
WOS关键词	ELMY H-MODES ; GOOD CONFINEMENT ; ASDEX UPGRADE ; PLASMAS ; PROFILE ; TRIANGULARITY ; REFLECTOMETRY ; PERFORMANCE ; ENERGY ; LIMIT
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
出版者	AIP Publishing
WOS记录号	WOS:000754519200003
资助机构	National Key R& D Program of China ; National Natural Science Foundation of China ; Youth Science and Technology Talents Support Program (2020) by the Anhui Association for Science and Technology
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/127566]
专题	中国科学院合肥物质科学研究院
通讯作者	Yang, Yao
作者单位	1.Chinese Acad Sci, Inst Plasma Phys, Hefei Inst Phys Sci, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Peoples R China 3.Shenzhen Univ, Coll Phys & Optoelect Engn, Shenzhen 518060, Peoples R China 4.Shenzhen Univ, Adv Energy Res Ctr, Shenzhen 518060, Peoples R China
推荐引用方式 GB/T 7714	Zhong, Fubin,Zhang, Tao,Yang, Yao,et al. Characterization of density scanning experiments with NBI and LHW on EAST[J]. AIP ADVANCES,2021,11.
APA	Zhong, Fubin.,Zhang, Tao.,Yang, Yao.,Wen, Fei.,Wu, Mingfu.,...&Gao, Xiang.(2021).Characterization of density scanning experiments with NBI and LHW on EAST.AIP ADVANCES,11.
MLA	Zhong, Fubin,et al."Characterization of density scanning experiments with NBI and LHW on EAST".AIP ADVANCES 11(2021).