Dynamics between toroidal Alfven eigenmode evolution and turbulence suppression under resonant magnetic perturbations on EAST

doi:10.1088/1741-4326/ac0b36

	Dynamics between toroidal Alfven eigenmode evolution and turbulence suppression under resonant magnetic perturbations on EAST
	Li, P.1,2; Li, Y. D.2; Li, J. G.2; Wu, G. J.2; Chen, W.3; Geng, J. S.2; Chen, F.1,2; Wang, Y. H.1,2; Zhang, B.4; Xu, L. Q.2
刊名	NUCLEAR FUSION
	2021-08-01
卷号	61
关键词	Alfven eigenmodes turbulence multi-scale physics energetic particles zonal flows
ISSN号	0029-5515
DOI	10.1088/1741-4326/ac0b36
通讯作者	Li, P.(lipan@ipp.ac.cn) ; Li, Y. D.(yd_li@ipp.ac.cn)
英文摘要	Since Alfven activity and turbulence are ubiquitous in magnetically confined plasma, it is important to understand the possible roles Alfven activity have in the nonlinear evolution of turbulence. The designed experiments in low collisionality are dedicated to studying the dynamics between turbulence and toroidal Alfven eigenmodes (TAEs), and assessing the multi-scale physics on the long-term scale behavior of fusion plasma. In TAEs (f similar to 200 kHz, n = 1) mitigation experiments under resonant magnetic perturbations (RMP, n (upper) = 2 and n (lower) = 3), there is a long-term (similar to 500 ms) quasi-stationary state after RMP rapidly reduces the TAEs amplitude four times. Turbulence suppression (2.0 < k rho (s) < 3.8) and low-frequency zonal flow (LFZF) generation are observed in this period. Similar experiments show that energetic particles (EPs) may act as a mediator of the cross-scale interactions and are beneficial for turbulence suppression and LFZF generation. Besides the synchronous couplings of turbulence (2.0 < k rho (s) < 3.8) and TAEs, TAEs and LFZF are observed. The dynamics between turbulence and TAEs provides an idea for synchronous control of TAEs and turbulence, and the resulting EPs confinement improvement, T (e) increase, T (i) increase and plasma stored energy increase are favorable for plasma performance.
资助项目	National Natural Science Foundation of China[11475222] ; National Natural Science Foundation of China[11875286] ; National Key R&D Program of China[2019YFE03010002]
WOS关键词	DRIFT WAVES ; ZONAL FLOWS ; PLASMA ; PROFILE ; GENERATION ; TRANSPORT
WOS研究方向	Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000674469500001
资助机构	National Natural Science Foundation of China ; National Key R&D Program of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/123333]
专题	中国科学院合肥物质科学研究院
通讯作者	Li, P.; Li, Y. D.
作者单位	1.Univ Sci & Technol China, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China 3.Southwestern Inst Phys, POB 432, Chengdu 610041, Peoples R China 4.East China Univ Technol, Nanchang 330013, Jiangxi, Peoples R China
推荐引用方式 GB/T 7714	Li, P.,Li, Y. D.,Li, J. G.,et al. Dynamics between toroidal Alfven eigenmode evolution and turbulence suppression under resonant magnetic perturbations on EAST[J]. NUCLEAR FUSION,2021,61.
APA	Li, P..,Li, Y. D..,Li, J. G..,Wu, G. J..,Chen, W..,...&Liu, H. Q..(2021).Dynamics between toroidal Alfven eigenmode evolution and turbulence suppression under resonant magnetic perturbations on EAST.NUCLEAR FUSION,61.
MLA	Li, P.,et al."Dynamics between toroidal Alfven eigenmode evolution and turbulence suppression under resonant magnetic perturbations on EAST".NUCLEAR FUSION 61(2021).