Observation of fluctuation-driven particle flux reduction by low-frequency zonal flow in a linear magnetized plasma

doi:10.1063/1.4905860

	Observation of fluctuation-driven particle flux reduction by low-frequency zonal flow in a linear magnetized plasma
	Chen, R.1,2; Xie, J. L.1; Yu, C. X.1; Liu, A. D.1; Lan, T.1; Zhang, S. B.2; Kong, D. F.2; Hu, G. H.2; Li, H.1; Liu, W. D.1
刊名	PHYSICS OF PLASMAS
	2015
卷号	22 页码:6
ISSN号	1070-664X
DOI	10.1063/1.4905860
英文摘要	Low-frequency zonal flow (ZF) has been observed in a linear magnetic plasma device, exhibiting significant intermittency. Using the conditional analysis method, a time-averaged fluctuation-induced particle flux was observed to consistently decrease as ZF increased in amplitude. A dominant fraction of the flux, which is driven by drift-wave harmonics, is reversely modulated by ZF in the time domain. Spectra of the flux, together with each of the related turbulence properties, are estimated subject to two conditions, i.e., when potential fluctuation series represents a strong ZF intermittency or a very weak ZF component. Comparison of frequency-domain results demonstrates that ZF reduces the cross-field particle transport primarily by suppressing the density fluctuation as well as decorrelating density and potential fluctuations. (C) 2015 AIP Publishing LLC.
资助项目	National Natural Science Foundation of China[10990210] ; National Natural Science Foundation of China[11205193] ; National Natural Science Foundation of China[11275200] ; National Magnetic Confinement Fusion Energy Program of China[2010GB107001] ; National Magnetic Confinement Fusion Energy Program of China[2013GB106002] ; National Magnetic Confinement Fusion Energy Program of China[2014GB109002]
WOS关键词	RADIAL ELECTRIC-FIELD ; HIGH CONFINEMENT MODE ; TRANSPORT REDUCTION ; TURBULENT TRANSPORT ; VELOCITY SHEAR ; BICOHERENCE ANALYSIS ; DYNAMICAL MODELS ; H-MODE ; TOKAMAK ; BARRIER
WOS研究方向	Physics
语种	英语
出版者	AMER INST PHYSICS
WOS记录号	WOS:000349178100018
资助机构	National Natural Science Foundation of China ; National Magnetic Confinement Fusion Energy Program of China
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/46568]
专题	中国科学院近代物理研究所
通讯作者	Chen, R.
作者单位	1.Univ Sci & Technol China, Dept Modern Phys, CAS Lab Geospace Environm, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Chen, R.,Xie, J. L.,Yu, C. X.,et al. Observation of fluctuation-driven particle flux reduction by low-frequency zonal flow in a linear magnetized plasma[J]. PHYSICS OF PLASMAS,2015,22:6.
APA	Chen, R..,Xie, J. L..,Yu, C. X..,Liu, A. D..,Lan, T..,...&Liu, W. D..(2015).Observation of fluctuation-driven particle flux reduction by low-frequency zonal flow in a linear magnetized plasma.PHYSICS OF PLASMAS,22,6.
MLA	Chen, R.,et al."Observation of fluctuation-driven particle flux reduction by low-frequency zonal flow in a linear magnetized plasma".PHYSICS OF PLASMAS 22(2015):6.