Numerical simulation of the multiple reversed shear Alfven eigenmodes associated with the triangularity Alfven gap

doi:10.1088/1674-1056/27/12/125202

	Numerical simulation of the multiple reversed shear Alfven eigenmodes associated with the triangularity Alfven gap
	Wang, Wenjia 1,2,3; Zhou, Deng1,3 ; Hu, Youjun1,3 ; Ming, Yue 1,2,3; Hao, Baolong 1,2
	2018-12-01
发表期刊	CHINESE PHYSICS B
ISSN	1674-1056
通讯作者	Wang, Wenjia(wenjiawang@ipp.ac.cn)
摘要	It was found that there are multiplicity of low shear toroidicity-induced Alfven eigenmodes in a zero beta limit if the inverse aspect ratio is larger than the magnetic shear at the mode location (Candy 1996 Phys. Lett. A 215 299). Because the reversed shear Alfven eigenmode (RSAE) and even the RSAE associated with the non-circular triangularity-induced Alfven eigenmode (NAE) gap (NAE-RSAE) usually reside near the shear-reversal point, the condition that the inverse aspect ratio is larger than the magnetic shear is naturally satisfied. For this reason, we numerically investigate the existence of multiplicity of core-localized NAE-RSAEs and mode characteristics in the present work. We firstly verify the existence of the multiplicity for zero beta plasma by using a D-shaped equilibrium. It is pointed out that, for a given toroidal mode number, the Alfven cascade spectrum accommodates down-sweeping and up-sweeping modes above and below the NAE range of frequencies. An analytical model for the existence of multiple RSAE modes is in good agreement with the simulation results. One notices that the triangularity has a greater effect on the odd-type modes than that on the even-type modes: the odd-type modes come into existence because of the plasma triangularity.
关键词	multiple Alfven eigenmodes negative magnetic shear simulation
DOI	10.1088/1674-1056/27/12/125202
关键词[WOS]	PRESSURE-GRADIENT ; STABILITY ; ELLIPTICITY ; MODES
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[11675222] ; National Natural Science Foundation of China[11675222]
项目资助者	National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS研究方向	Physics
WOS类目	Physics, Multidisciplinary
WOS记录号	WOS:000454123200002
出版者	IOP PUBLISHING LTD
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.hfcas.ac.cn:8080/handle/334002/41069
专题	中科院等离子体物理研究所
通讯作者	Wang, Wenjia
作者单位	1.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Anhui, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China 3.Chinese Acad Sci, Ctr Magnet Fus Theory, Hefei 230031, Anhui, Peoples R China
第一作者单位	中科院等离子体物理研究所
通讯作者单位	中科院等离子体物理研究所
推荐引用方式 GB/T 7714	Wang, Wenjia,Zhou, Deng,Hu, Youjun,et al. Numerical simulation of the multiple reversed shear Alfven eigenmodes associated with the triangularity Alfven gap[J]. CHINESE PHYSICS B,2018,27(12):7.
APA	Wang, Wenjia,Zhou, Deng,Hu, Youjun,Ming, Yue,&Hao, Baolong.(2018).Numerical simulation of the multiple reversed shear Alfven eigenmodes associated with the triangularity Alfven gap.CHINESE PHYSICS B,27(12),7.
MLA	Wang, Wenjia,et al."Numerical simulation of the multiple reversed shear Alfven eigenmodes associated with the triangularity Alfven gap".CHINESE PHYSICS B 27.12(2018):7.