Excitation of beta-induced Alfven eigenmodes by the coupling between geodesic acoustic mode and magnetic island | |
Cai, Huishan1; Gao, Baofeng1; Xu, Ming2; Liu, Adi1; Kong, Defeng2 | |
刊名 | NUCLEAR FUSION |
2021-03-01 | |
卷号 | 61 |
关键词 | beta induced Alfvé n eigenmodes magnetic island geodesic acoustic mode tearing modes |
ISSN号 | 0029-5515 |
DOI | 10.1088/1741-4326/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 |
内容类型 | 期刊论文 |
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.Univ Sci & Technol China, Sch Nucl Sci & Technol, CAS Key Lab Geospace Environm, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, 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). |
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