Alfvén continuum in the presence of a magnetic island in a cylinder configuration  

作　　者：杨骏辉 曹锦佳 赵建华 戴勇智 向东 Junhui YANG;Jinjia CAO;Jianhua ZHAO;Yongzhi DAI;Dong XIANG(School of Nuclear Science and Technology,University of South China,Hengyang 421001,People’s Republic of China)

机构地区：[1]School of Nuclear Science and Technology,University of South China,Hengyang 421001,People’s Republic of China

出　　处：《Plasma Science and Technology》2023年第3期40-50,共11页等离子体科学和技术（英文版）

基　　金：supported by the ITER Project of Ministry of Science and Technology(No.2022YFE03080002);National Natural Science Foundation of China(Nos.11605088 and 12005100);the Key Scientific Research Program of Education Department of Hunan Province(Nos.20A417 and 20A439);the National Magnetic Confinement Fusion Science Program of China(No.2015GB110002);the Hunan Provincial Natural Science Foundation of China(No.2017JJ3268);the International Cooperation Base Project of Hunan Province of China(No.2018WK4009);the Key Laboratory of Magnetic Confinement Nuclear Fusion Research in Hengyang(No.2018KJ108);the PhD Start-Up Fund of University of South China(No.2017XQD08)。

摘　　要：In this work,the effect of a magnetic island on Alfvén waves is studied.A physical model is established wherein Alfvén waves propagate in the presence of a magnetic island in a cylindrical geometry.The structure of the Alfvén wave continuum is calculated by considering only the coupling caused by the periodicity in the helical angle of the magnetic island.The results show that the magnetic island can induce an upshift in the Alfvén continuum.Moreover,the coupling between different branches of the continuous spectrum becomes more significant with increasing continuum mode numbers near the boundary of the magnetic island.

关 键 词：Alfvén waves cylindrical geometry magnetic island continuum coupling 

分 类 号：O53[理学—等离子体物理]