Nonlinear simulation and energy analysis of the EAST coherent mode

doi:10.1088/1741-4326/ab5e73

	Nonlinear simulation and energy analysis of the EAST coherent mode
	Huang, Y. Q.1,2,5; Xia, T. Y.2,5; Xu, X. Q.3; Kong, D. F.2,5; Wang, Y. M.2,5; Ye, Y.2,5; Qian, Z. H.1,2,5; Zang, Q.2,5; Wu, M. P.1,2,5; Chu, Y. Q.2,5
刊名	NUCLEAR FUSION
	2020-02-01
卷号	60
关键词	coherent mode energy transfer bispectral analysis relative phase kinetic and magnetic energy
ISSN号	0029-5515
DOI	10.1088/1741-4326/ab5e73
通讯作者	Xia, T. Y.(xiaty@ipp.ac.cn)
英文摘要	The EAST coherent modes (CMs) during the inter-ELM phase are simulated by the electromagnetic six-field two-fluid module in BOUT++ framework. The fluctuation level of the electrostatic potential, electron pressure and density perturbations are comparable to the experiments, and the simulated electrostatic perturbation is around two orders of magnitude larger than the magnetic one in EAST CM. The frequency and poloidal wave number are consistent with experiments in the simulations of EAST CM equilibriums. The energy transfer between three-wave coupling indicates that the energy tends to transfer from medium-n to low-n modes in the early nonlinear phase, and the modes coupling effect in the nonlinear saturation phase is larger than that in the early nonlinear phase. Both the energy transfer and bispectral analysis show that the N-i fluctuation tends to generate the 'single-mode' coupling and T-e tends to be 'multiple-mode', which indicates that the collapse of the density profile is larger than the electron temperature. The relative phase analysis is applied to evaluate whether the turbulence can extract the energy from density and temperature profiles. The result indicates that the density profile provides much more energy to drive the turbulence than electron temperature. The kinetic and magnetic energy transfer rates are used to understand the instability and turbulence driving mechanisms of the EAST CM. In the linear phase of the nonlinear simulation, the instability is driven by the peeling-ballooning mode and drift-Alfven wave (DAW), and the radial electric field and shear Alfven wave have large suppressing effects. The turbulence of EAST CM is a predominantly electrostatic mode, which corresponds to the Reynolds stress seven times larger than Maxwell stress. In addition, the effect of the electrostatic part in DAW is much larger than the electromagnetic one.
资助项目	National Key R&D Program of China[2017YFE0301100] ; National Key R&D Program of China[2017YFE0301101] ; National Key R&D Program of China[2014GB106001] ; China Natural Science Foundation[11675217] ; China Natural Science Foundation[1105236] ; Youth Innovation Promotion Association Chinese Academy of Sciences[2017479] ; K C Wong Education Foundation
WOS关键词	DIGITAL BISPECTRAL ANALYSIS ; TURBULENCE ; PEDESTAL
WOS研究方向	Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000520149100001
资助机构	National Key R&D Program of China ; China Natural Science Foundation ; Youth Innovation Promotion Association Chinese Academy of Sciences ; K C Wong Education Foundation
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/103747]
专题	中国科学院合肥物质科学研究院
通讯作者	Xia, T. Y.
作者单位	1.Univ Sci & Technol China, Hefei, Peoples R China 2.Chinese Acad Sci, China Ctr Magnet Fus Theory, Hefei, Peoples R China 3.Lawrence Livermore Natl Lab, Livermore, CA 94550 USA 4.Hengyang Normal Univ, Hengyang, Peoples R China 5.Chinese Acad Sci, Inst Plasma Phys, Hefei, Peoples R China
推荐引用方式 GB/T 7714	Huang, Y. Q.,Xia, T. Y.,Xu, X. Q.,et al. Nonlinear simulation and energy analysis of the EAST coherent mode[J]. NUCLEAR FUSION,2020,60.
APA	Huang, Y. Q..,Xia, T. Y..,Xu, X. Q..,Kong, D. F..,Wang, Y. M..,...&Zhang, D. Z..(2020).Nonlinear simulation and energy analysis of the EAST coherent mode.NUCLEAR FUSION,60.
MLA	Huang, Y. Q.,et al."Nonlinear simulation and energy analysis of the EAST coherent mode".NUCLEAR FUSION 60(2020).