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Excitation of beta-induced Alfven eigenmodes by the coupling between geodesic acoustic mode and magnetic island

文献类型：期刊论文

作者Cai, Huishan2; Gao, Baofeng2; Xu, Ming1; Liu, Adi2; Kong, Defeng1
刊名NUCLEAR FUSION
出版日期2021-03-01
卷号61
ISSN号0029-5515
关键词beta induced Alfvé n eigenmodes magnetic island geodesic acoustic mode tearing modes
DOI10.1088/1741-4326/abd3e9
通讯作者Cai, Huishan(hscai@mail.ustc.edu.cn)
英文摘要The mechanism of excitation of beta-induced Alfven eigenmodes (BAEs) with magnetic islands larger than a threshold without energetic ions is studied. It is found that the nonlinear coupling between geodesic acoustic mode and magnetic islands can drive the pair of BAEs. The phase of BAEs to island should be pi/2 to excite the BAEs and the magnetic island is larger than a threshold. The results are consistent with the experimental results shown in EAST(#86309). It implies that similar experimental results in other tokamaks, that BAEs excitation by magnetic islands without energetic ions, may be from the nonlinear coupling between islands and waves. It also implies that the existence of magnetic islands can make the excitation of BAEs easier in plasma with energetic ions, since the magnetic island can also increase the pressure gradient of energetic ions near the island separatrix. This predicts that BAEs may appear more frequently in the presence of magnetic islands in ITER.
资助项目National Natural Science Foundation of China[11822505] ; National Natural Science Foundation of China[11835016] ; Key Research Program of Frontier Sciences, CAS[2014GB106004] ; Key Research Program of Frontier Sciences, CAS[QYZDJSSW-SYS016] ; Youth Innovation Promotion Association CAS ; Excellence Program of Hefei Science Center CAS 2019[HSC-UE013] ; Fundamental Research Funds for the Central Universities[WK3420000008]
WOS研究方向Physics
语种英语
出版者IOP PUBLISHING LTD
WOS记录号WOS:000619790000001
资助机构National Natural Science Foundation of China ; Key Research Program of Frontier Sciences, CAS ; Youth Innovation Promotion Association CAS ; Excellence Program of Hefei Science Center CAS 2019 ; Fundamental Research Funds for the Central Universities
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/120254]  
专题中国科学院合肥物质科学研究院
通讯作者Cai, Huishan
作者单位1.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
2.Univ Sci & Technol China, Sch Nucl Sci & Technol, CAS Key Lab Geospace Environm, Hefei 230026, Peoples R China
推荐引用方式
GB/T 7714		 Cai, Huishan,Gao, Baofeng,Xu, Ming,et al. Excitation of beta-induced Alfven eigenmodes by the coupling between geodesic acoustic mode and magnetic island[J]. NUCLEAR FUSION,2021,61.
APA Cai, Huishan,Gao, Baofeng,Xu, Ming,Liu, Adi,&Kong, Defeng.(2021).Excitation of beta-induced Alfven eigenmodes by the coupling between geodesic acoustic mode and magnetic island.NUCLEAR FUSION,61.
MLA Cai, Huishan,et al."Excitation of beta-induced Alfven eigenmodes by the coupling between geodesic acoustic mode and magnetic island".NUCLEAR FUSION 61(2021).

入库方式： OAI收割

来源：合肥物质科学研究院

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