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

文献类型：期刊论文

作者Wang, Wenjia1,2,3; Zhou, Deng2,3; Hu, Youjun2,3; Ming, Yue1,2,3; Hao, Baolong1,3
刊名CHINESE PHYSICS B
出版日期2018-12-01
卷号27期号:12页码:7
ISSN号1674-1056
关键词multiple Alfven eigenmodes negative magnetic shear simulation
DOI10.1088/1674-1056/27/12/125202
通讯作者Wang, Wenjia(wenjiawang@ipp.ac.cn)
英文摘要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.
WOS关键词PRESSURE-GRADIENT ; STABILITY ; ELLIPTICITY ; MODES
资助项目National Natural Science Foundation of China[11675222]
WOS研究方向Physics
语种英语
出版者IOP PUBLISHING LTD
WOS记录号WOS:000454123200002
资助机构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
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/41069]  
专题合肥物质科学研究院_中科院等离子体物理研究所
通讯作者Wang, Wenjia
作者单位1.Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China
2.Chinese Acad Sci, Ctr Magnet Fus Theory, Hefei 230031, Anhui, Peoples R China
3.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Anhui, Peoples R China
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.

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来源：合肥物质科学研究院

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