globalchange  > 气候减缓与适应
DOI: 10.1029/2018JA025607
Scopus记录号: 2-s2.0-85051092528
论文题名:
Electron Dynamics in Magnetosheath Mirror-Mode Structures
作者: Yao S.T.; Shi Q.Q.; Liu J.; Yao Z.H.; Guo R.L.; Ahmadi N.; Degeling A.W.; Zong Q.G.; Wang X.G.; Tian A.M.; Russell C.T.; Fu H.S.; Pu Z.Y.; Fu S.Y.; Zhang H.; Sun W.J.; Li L.; Xiao C.J.; Feng Y.Y.; Giles B.L.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期:7
起始页码: 5561
结束页码: 5570
语种: 英语
英文关键词: betatron ; donut like ; electron dynamics ; electron pitch angle ; mirror mode ; MMS
英文摘要: Mirror-mode structures are widely observed in space plasma environments. Although plasma features within the structures have been extensively investigated in theoretical models and numerical simulations, relatively few observational studies have been made, due to a lack of high-cadence measurements of particle distributions in previous space missions. In this work, electron dynamics associated with mirror-mode structures are studied based on Magnetospheric Multiscale observations of electron pitch angle distributions. We define mirror-mode peaks/troughs as the region where the magnetic field strength is greater/smaller than the mean field. The observations show that most electrons are trapped inside the mirror-mode troughs and display a donut-like pitch angle distribution configuration. Besides the trapped electrons in mirror-mode troughs, we find that electrons are also trapped between ambient mirror-mode peaks and coexisting untrapped electrons within the mirror-mode structure. Analysis shows that the observed donut-like electron distributions are the result of betatron cooling and the spatial dependence of electron pitch angles within the structure. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113663
Appears in Collections:气候减缓与适应

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作者单位: Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai, China; State Key Laboratory of Space Weather, National Space Science Center, Chinese Academy of Sciences, Beijing, China; Mullard Space Science Laboratory, University College London, Dorking, United Kingdom; Laboratoire de Physique Atmosphérique et Planétaire, STAR Institute, Université de Liège, Liège, Belgium; Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China; Laboratory for Atmospheric and Space Physics, University of Colorado Boulder, Boulder, CO, United States; School of Earth and Space Sciences, Peking University, Beijing, China; Department of Physics, Harbin Institute of Technology, Harbin, China; Department of Earth, Planetary and Space Sciences, University of California, Los Angeles, CA, United States; School of Space and Environment, Beihang University, Beijing, China; Physics Department and Geophysical Institute, University of Alaska Fairbanks, Fairbanks, AK, United States; State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing, China; NASA Goddard Space Flight Center, Greenbelt, MD, United States

Recommended Citation:
Yao S.T.,Shi Q.Q.,Liu J.,et al. Electron Dynamics in Magnetosheath Mirror-Mode Structures[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(7)
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