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Analytical study on magnetic component of geodesic acoustic mode

文献类型：期刊论文

作者Xie,Baoyi1,2; Ye,Lei3; Chen,Yang4; Zhao,Pengfei3; Guo,Wenfeng3; Xiang,Nong3
刊名Physica Scripta
出版日期2022-05-03
卷号97
关键词geodesic acoustic mode magnetic components gyrokinetic equation coupling of magnetic drift frequency
ISSN号0031-8949
DOI10.1088/1402-4896/ac698d
通讯作者Xie,Baoyi()
英文摘要Abstract To understand the role of geodesic acoustic modes (GAMs) in regulating the transport by interacting with background electromagnetic turbulence, a thorough theoretical understanding of the magnetic components of the mode is required. In this study, the magnetic components of GAM are analytically investigated under the gyrokinetic framework with both the m = 1 and m = 2 harmonics are considered, where m is the poloidal mode number. With the quasi-neutrality condition and Ampère’s law, the amplitudes of various poloidal magnetic components are derived. It is shown that both m = 1 and m = 2 magnetic components exist and are dominated by the cosine and sine components, respectively. In addition, it is found that the amplitudes of all magnetic components increase with respect to the ratio of plasma pressure to magnetic pressure β and safety factor q . Most importantly, the amplitude of m = 1 magnetic component is significantly enhanced due to the coupling of magnetic drift frequency with the first and second harmonics of the distribution functions, thus it can be comparable to that of m = 2 magnetic component under certain conditions. The various magnetic components derived in this study may provide some guidance for experimental measurements.
语种英语
WOS记录号IOP:PS_97_6_065601
出版者IOP Publishing
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/129637]  
专题中国科学院合肥物质科学研究院
通讯作者Xie,Baoyi
作者单位1.Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, People’s Republic of China
2.Advanced Energy Research Center, Shenzhen University, Shenzhen 518060, People’s Republic of China
3.Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China
4.Department of Physics, University of Colorado at Boulder, Boulder 80309, United States of America
推荐引用方式
GB/T 7714		 Xie,Baoyi,Ye,Lei,Chen,Yang,et al. Analytical study on magnetic component of geodesic acoustic mode[J]. Physica Scripta,2022,97.
APA Xie,Baoyi,Ye,Lei,Chen,Yang,Zhao,Pengfei,Guo,Wenfeng,&Xiang,Nong.(2022).Analytical study on magnetic component of geodesic acoustic mode.Physica Scripta,97.
MLA Xie,Baoyi,et al."Analytical study on magnetic component of geodesic acoustic mode".Physica Scripta 97(2022).

入库方式： OAI收割

来源：合肥物质科学研究院

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