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Trapped and Accelerated Electrons Within a Magnetic Mirror Behind a Flux Rope on the Magnetopause

文献类型：期刊论文

作者Zhu, Changbo1,2,3,4; Zhang, Hui1,2,3; Fu, Song5; Ni, Binbin5; Strangeway, R. J.6; Giles, B. L.7; Wan, Weixing1,2,3; Liu, Libo1,2,3; Chen, Yiding1,2,3; Le, Huijun1,2,3
刊名JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
出版日期2019-06-01
卷号124期号:6页码:3993-4008
ISSN号2169-9380
DOI10.1029/2019JA026464
英文摘要On 6 December 2015, the Magnetospheric Multiscale satellites traversed the southward outflow of a magnetic reconnection on the magnetopause from the outside in. The magnetic structures or the geometries of the field lines inside this outflow are distinguished in detail by using the plasma and magnetic field observations. A flux rope and the magnetic flux piling-up against this flux rope are found embedding in this outflow. The strong magnetosheath magnetic field allows the formation of a magnetic mirror in the flux pileup region. As the Magnetospheric Multiscale satellites approached the flux rope inside this mirror, the pitch angles of electrons converge toward 90 degrees, indicating that the electrons are trapped inside the mirror. The local loss cones of these electrons along the satellite trajectory are estimated. It is found that the triangle-like pitch angle distribution is well embraced by the curves of the estimated local loss cones. The energy spectra inside the mirror show that the electrons are accelerated in the direction perpendicular to the magnetic field. A test particle method is used to reproduce the acceleration process in a fitted 3-D magnetic field model. The results show that the quasi-perpendicular electrons experience the betatron acceleration when drifting into the stronger field region and that the electrons may also experience the Fermi acceleration when their pitch angles enlarge. The mirror structure on the magnetopause provides a unique opportunity to explore the behaviors of the magnetic reconnection associated electrons.
WOS关键词REGION ; ONSET ; FIELD
资助项目National Natural Science Foundation of China[41731068] ; National Natural Science Foundation of China[41774175] ; National Natural Science Foundation of China[41621063] ; Scientific and Technological Innovation, and Cooperation Group of Chinese Academy of Sciences
WOS研究方向Astronomy & Astrophysics
语种英语
出版者AMER GEOPHYSICAL UNION
WOS记录号WOS:000477723100010
资助机构National Natural Science Foundation of China ; Scientific and Technological Innovation, and Cooperation Group of Chinese Academy of Sciences ; National Natural Science Foundation of China ; Scientific and Technological Innovation, and Cooperation Group of Chinese Academy of Sciences ; National Natural Science Foundation of China ; Scientific and Technological Innovation, and Cooperation Group of Chinese Academy of Sciences ; National Natural Science Foundation of China ; Scientific and Technological Innovation, and Cooperation Group of Chinese Academy of Sciences
源URL[http://ir.iggcas.ac.cn/handle/132A11/92938]  
专题地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者Zhang, Hui
作者单位1.Chinese Acad Sci, Inst Ueol & Geophys, Key Lab Earth & Planetary Rnys, Beijing, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Beijing Natl Observ Space Environm, Beijing, Peoples R China
3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China
4.Chinese Acad Sci, Natl Space Sci Ctr, Beijing, Peoples R China
5.Wuhan Univ, Sch Elect Informat, Dept Space Phys, Wuhan, Hubei, Peoples R China
6.UCLA, Dept Earth Planetary & Space Sci, Los Angeles, CA USA
7.NASA, Goddard Space Flight Ctr, Greenbelt, MD USA
推荐引用方式
GB/T 7714		 Zhu, Changbo,Zhang, Hui,Fu, Song,et al. Trapped and Accelerated Electrons Within a Magnetic Mirror Behind a Flux Rope on the Magnetopause[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2019,124(6):3993-4008.
APA Zhu, Changbo.,Zhang, Hui.,Fu, Song.,Ni, Binbin.,Strangeway, R. J..,...&Le, Huijun.(2019).Trapped and Accelerated Electrons Within a Magnetic Mirror Behind a Flux Rope on the Magnetopause.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,124(6),3993-4008.
MLA Zhu, Changbo,et al."Trapped and Accelerated Electrons Within a Magnetic Mirror Behind a Flux Rope on the Magnetopause".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 124.6(2019):3993-4008.

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来源：地质与地球物理研究所

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