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Electron acceleration in interaction of magnetic islands in large temporal-spatial turbulent magnetic reconnection
Zhu BJ(朱伯靖)1,2; Yan H(颜辉)3; David.A.Yuen4,5; Shi YL(石耀霖)6,7
发表期刊Earth and Planetary Physics
2019-02
卷号3期号:1页码:17-25
DOI10.26464/epp2019003
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关键词Hybrid Particle Acceleration Mechanism Large Temporal-spatial Turbulent Magnetic Reconnection Hydro-dynamic-kinetic Model
摘要

A new combined Fermi, betatron, and turbulent electron acceleration mechanism is proposed in interaction of magnetic islands during turbulent magnetic reconnection evolution in explosive astrophysical phenomena at large temporal-spatial scale (LTSTMR), the ratio of observed current sheets thickness to electron characteristic length, electron Larmor radius for low-β and electron inertial length for high-β, is on the order of 1010–1011; the ratio of observed evolution time to electron gyroperiod is on the order of 107–109). The original combined acceleration model is known to be one of greatest importance in the interaction of magnetic islands; it assumes that the continuous kinetic-dynamic temporal-spatial scale evolution occurs as two separate independent processes. In this paper, we reconsider the combined acceleration mechanism by introducing a kinetic-dynamic-hydro full-coupled model instead of the original micro-kinetic or macro-dynamic model. We investigate different acceleration mechanisms in the vicinity of neutral points in magnetic islands evolution, from the stage of shrink and breakup into smaller islands (kinetic scale), to the stage of coalescence and growth into larger islands (dynamic scale), to the stages of constant and quasi-constant (contracting-expanding) islands (hydro scale). As a result, we give for the first time the acceleration efficiencies of different types of acceleration mechanisms in magnetic islands’ interactions in solar atmosphere LTSTMR activities (pico-, 10–2–105 m; nano-, 105–106 m; micro-, 106–107 m; macro-, 107–108 m; large-, 108–109 m).

资助项目CAS[XDA17040507] ; CAS[XDA15010900] ; national basic research program of China[2013CBA01503] ; key program of NSFC[11333007] ; joint funds of NSFC[U1631130] ; frontier science key programs of CAS[QYZDJ-SSWSLH012] ; program for innovation team of Yunnan Province ; program for Guangdong introducing Innovative and entrepreneurial teams[2016ZT06D211] ; special program for applied research on super computation of the NSFC-Guangdong joint fund (second phase)[U1501501]
项目资助者CAS[XDA17040507, XDA15010900] ; national basic research program of China[2013CBA01503] ; key program of NSFC[11333007] ; joint funds of NSFC[U1631130] ; frontier science key programs of CAS[QYZDJ-SSWSLH012] ; program for innovation team of Yunnan Province ; program for Guangdong introducing Innovative and entrepreneurial teams[2016ZT06D211] ; special program for applied research on super computation of the NSFC-Guangdong joint fund (second phase)[U1501501]
语种英语
学科领域太阳物理学
学科门类理学 ; 理学::物理学
ISSN2096-3955
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/18435
专题太阳物理研究组
通讯作者Zhu BJ(朱伯靖)
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China
2.Center for Astronomical Mega-Science, Chinese Academy of Sciences, Beijing 100012, China
3.3National Supercomputer Center in Guangzhou, Sun Yat-sen University, Guangzhou 510006, China
4.Department of Earth Science and Minnesota Supercomputing Institute, University of Minnesota, Minneapolis 55455, USA
5.Applied Physics and Applied Mathematics Department, Columbia University, New York 10027, USA
6.Key Laboratory of Computing Geodynamics, Chinese Academy of Sciences, Beijing 100049, China
7.College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
推荐引用方式
GB/T 7714
Zhu BJ,Yan H,David.A.Yuen,et al. Electron acceleration in interaction of magnetic islands in large temporal-spatial turbulent magnetic reconnection[J]. Earth and Planetary Physics,2019,3(1):17-25.
APA Zhu BJ,Yan H,David.A.Yuen,&Shi YL.(2019).Electron acceleration in interaction of magnetic islands in large temporal-spatial turbulent magnetic reconnection.Earth and Planetary Physics,3(1),17-25.
MLA Zhu BJ,et al."Electron acceleration in interaction of magnetic islands in large temporal-spatial turbulent magnetic reconnection".Earth and Planetary Physics 3.1(2019):17-25.
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