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

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	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
	2017-02-21
发表期刊	Plasma Science and Technology
ISSN	1009-0630
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.
关键词	L–H transition E×B flow shear turbulence suppression zonal flows Reynolds stress 52.55.Fa 52.25.Fi
DOI	10.1088/2058-6272/19/3/033001
语种	英语
WOS记录号	IOP:1009-0630-19-3-033001
出版者	IOP Publishing
引用统计
文献类型	期刊论文
条目标识符	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).