Experimental identification of edge temperature ring oscillation and alternating turbulence transitions near the pedestal top for sustaining stationary I-mode

doi:10.1088/1741-4326/abb14a

	Experimental identification of edge temperature ring oscillation and alternating turbulence transitions near the pedestal top for sustaining stationary I-mode
	Liu, A. D.2; Zou, X. L.1; Han, M. K.3; Wang, T. B.4,5; Zhou, C.2; Wang, M. Y.2,6; Duan, Y. M.7; Verdoolaege, G.5; Dong, J. Q.4; Wang, Z. X.3
刊名	NUCLEAR FUSION
	2020-12-01
卷号	60
关键词	I-mode turbulence transition pedestal top azimuthally symmetric structure
ISSN号	0029-5515
DOI	10.1088/1741-4326/abb14a
通讯作者	Wang, M. Y.(wmyuan@mail.ustc.edu.cn)
英文摘要	A reproducible stationary improved confinement mode (I-mode) has been achieved recently in the Experimental Advanced Superconducting Tokamak (EAST), featuring good confinement without particle transport barrier. The microscopic mechanism of sustaining stationary I-mode, based on the coupling between turbulence transitions and the edge temperature oscillation, has been discovered for the first time. A radially localized edge temperature ring oscillation (ETRO) with azimuthally symmetric structure (n = 0,m = 0) has been identified and it is accompanied by alternating turbulence transitions between an electron diamagnetic drift turbulence (ET) and an ion diamagnetic drift turbulence (IT). The transition is controlled by local electron temperature gradient and strong non-linear couplings between weak coherent mode (WCM) and ET could be identified near the pedestal top, suggesting the unique status of the pedestal top region in sustaining the stationary I-mode confinement on EAST.
资助项目	National MCF Energy RD Program[2017YFE0301204] ; National MCF Energy RD Program[2018YFE0311200] ; Natural Science Foundation of China[U1967206] ; Natural Science Foundation of China[11975231] ; Natural Science Foundation of China[11922513] ; EAST team
WOS关键词	CONFINEMENT ; REGIME ; POWER
WOS研究方向	Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000576902100001
资助机构	National MCF Energy RD Program ; Natural Science Foundation of China ; EAST team
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/104434]
专题	中国科学院合肥物质科学研究院
通讯作者	Wang, M. Y.
作者单位	1.CEA, IRFM, F-13108 St Paul Les Durance, France 2.Univ Sci & Technol China, Sch Nucl Sci & Technol, Hefei 230026, Anhui, Peoples R China 3.Dalian Univ Technol, Key Lab Mat Modificat Beams, Sch Phys, Dalian 116024, Peoples R China 4.Southwestern Inst Phys, Chengdu 610041, Peoples R China 5.Univ Ghent, Dept Appl Phys, B-9000 Ghent, Belgium 6.Hebei Key Lab Compact Fus, Langfang 065001, Peoples R China 7.Chinese Acad Sci, Inst Plasma Phys, Hefei 230021, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Liu, A. D.,Zou, X. L.,Han, M. K.,et al. Experimental identification of edge temperature ring oscillation and alternating turbulence transitions near the pedestal top for sustaining stationary I-mode[J]. NUCLEAR FUSION,2020,60.
APA	Liu, A. D..,Zou, X. L..,Han, M. K..,Wang, T. B..,Zhou, C..,...&Liu, W. D..(2020).Experimental identification of edge temperature ring oscillation and alternating turbulence transitions near the pedestal top for sustaining stationary I-mode.NUCLEAR FUSION,60.
MLA	Liu, A. D.,et al."Experimental identification of edge temperature ring oscillation and alternating turbulence transitions near the pedestal top for sustaining stationary I-mode".NUCLEAR FUSION 60(2020).