Understanding L–H transition in tokamak fusion plasmas**This work was supported by National Magnetic Confinement Fusion Science Program of China under Contracts No. 2015GB101000, No. 2013GB106000, and No. 2013GB107000 and National Natural Science Foundation of China under Contracts No. 11575235 and No. 11422546.

doi:10.1088/2058-6272/19/3/033001

	Understanding L–H transition in tokamak fusion plasmas**This work was supported by National Magnetic Confinement Fusion Science Program of China under Contracts No. 2015GB101000, No. 2013GB106000, and No. 2013GB107000 and National Natural Science Foundation of China under Contracts No. 11575235 and No. 11422546.
	XU,Guosheng; WU,Xingquan
刊名	Plasma Science and Technology
	2017-02-21
卷号	19
关键词	L–H transition E×B flow shear turbulence suppression zonal flows Reynolds stress 52.55.Fa 52.25.Fi
ISSN号	1009-0630
DOI	10.1088/2058-6272/19/3/033001
英文摘要	Abstract This paper reviews the current state of understanding of the L–H transition phenomenon in tokamak plasmas with a focus on two central issues: (a) the mechanism for turbulence quick suppression at the L–H transition; (b) the mechanism for subsequent generation of sheared flow. We briefly review recent advances in the understanding of the fast suppression of edge turbulence across the L–H transition. We uncover a comprehensive physical picture of the L–H transition by piecing together a number of recent experimental observations and insights obtained from 1D and 2D simulation models. Different roles played by diamagnetic mean flow, neoclassical-driven mean flow, turbulence-driven mean flow, and turbulence-driven zonal flows are discussed and clarified. It is found that the L–H transition occurs spontaneously mediated by a shift in the radial wavenumber spectrum of edge turbulence, which provides a critical evidence for the theory of turbulence quench by the flow shear. Remaining questions and some key directions for future investigations are proposed.
语种	英语
出版者	IOP Publishing
WOS记录号	IOP:1009-0630-19-3-033001
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/42890]
专题	中国科学院合肥物质科学研究院
作者单位	Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China
推荐引用方式 GB/T 7714	XU,Guosheng,WU,Xingquan. Understanding L–H transition in tokamak fusion plasmas**This work was supported by National Magnetic Confinement Fusion Science Program of China under Contracts No. 2015GB101000, No. 2013GB106000, and No. 2013GB107000 and National Natural Science Foundation of China under Contracts No. 11575235 and No. 11422546.[J]. Plasma Science and Technology,2017,19.
APA	XU,Guosheng,&WU,Xingquan.(2017).Understanding L–H transition in tokamak fusion plasmas**This work was supported by National Magnetic Confinement Fusion Science Program of China under Contracts No. 2015GB101000, No. 2013GB106000, and No. 2013GB107000 and National Natural Science Foundation of China under Contracts No. 11575235 and No. 11422546..Plasma Science and Technology,19.
MLA	XU,Guosheng,et al."Understanding L–H transition in tokamak fusion plasmas**This work was supported by National Magnetic Confinement Fusion Science Program of China under Contracts No. 2015GB101000, No. 2013GB106000, and No. 2013GB107000 and National Natural Science Foundation of China under Contracts No. 11575235 and No. 11422546.".Plasma Science and Technology 19(2017).