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RELATIVISTIC ELECTRONS PRODUCED BY RECONNECTING ELECTRIC FIELDS IN A LASER-DRIVEN BENCH-TOP SOLAR FLARE
Zhong, J. Y.1,2,3; Lin J(林隽)4; Li, Y. T.3,5; Wang, X.7; Li Y(李燕)4; Zhang, K.1; Yuan, D. W.1; Ping, Y. L.1; Wei, H. G.1; Wang, J. Q.8; Su, L. N.5; Li, F.5; Han, B.1; Liao, G. Q.5; Yin, C. L.5; Fang, Y.3,9; Yuan, X.3,9; Wang, C.10; Sun, J. R.10; Liang, G. Y.1; Wang, F. L.1; Ding, Y. K.3,11; He, X. T.3,12,13; Zhu, J. Q.3,14; Sheng, Z. M.3,6,9; Li, G.15; Zhao, G.1; Zhang, J.3,9
Source PublicationASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
2016-08-01
Volume225Issue:2
DOI10.3847/0067-0049/225/2/30
Contribution Rank第4完成单位
Indexed BySCI
KeywordAcceleration Of Particles Magnetic Reconnection Magnetic Fields Plasmas
Abstract

Laboratory experiments have been carried out to model the magnetic reconnection process in a solar flare with powerful lasers. Relativistic electrons with energy up to megaelectronvolts. are detected along the magnetic separatrices bounding the reconnection outflow, which exhibit a kappa-like distribution with an effective temperature of similar to 10(9) K. The acceleration of non-thermal electrons is found to be. more efficient in the case with a guide magnetic field (a component of a. magnetic field along the reconnection-induced electric field) than. in the case without a guide field. Hardening of the spectrum at energies >= 500 keV is observed in both cases, which remarkably resembles the hardening. of hard X-ray and gamma-ray spectra observed in many solar flares. This supports a recent proposal that the hardening in the hard X-ray and gamma-ray emissions of solar flares is due to a hardening of the source-electron spectrum. We also performed numerical simulations that help examine behaviors of electrons in the reconnection process with the electromagnetic field configurations occurring in the experiments. The trajectories of non-thermal electrons observed in the experiments were well duplicated in the simulations. Our numerical simulations generally reproduce the electron energy spectrum as well, except for. the hardening of the electron spectrum. This suggests that other mechanisms such as shock or turbulence may play an important role in the production. of the observed energetic electrons.

Funding Project973 Program Grant[2013CBA01503] ; NSFC[11273033] ; NSFC[11205015] ; NSFC[11135012] ; NSFC[11220101002] ; NSFC[10821061] ; NSFC[11273055] ; NSFC[11333007] ; CAS grant[XDB09040202] ; Beijing Nova Program Grant[Z131109000413050]
Funding Organization973 Program Grant[2013CBA01503] ; NSFC[11273033, 11205015, 11135012, 11220101002, 10821061, 11273055, 11333007] ; CAS grant[XDB09040202] ; Beijing Nova Program Grant[Z131109000413050]
Language英语
Subject Area天文学 ; 太阳与太阳系 ; 太阳物理学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0067-0049
URL查看原文
WOS IDWOS:000382309500013
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordUNDERSTANDING PARTICLE-ACCELERATION ; GENERATED MAGNETIC-FIELDS ; RAY-IMAGING SPECTROSCOPY ; CURRENT SHEETS ; NUMERICAL EXPERIMENTS ; ENERGETIC PARTICLES ; PHYSICAL-PROPERTIES ; KAPPA-DISTRIBUTION ; 2-RIBBON FLARES ; COSMIC-RAYS
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9718
Collection太阳物理研究组
Corresponding AuthorZhong, J. Y.
Affiliation1.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
2.Department of Astronomy, Beijing Normal University, Beijing 100875, China
3.Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai 200240, China
4.Yunnan Observatories, Chinese Academy of Sciences, P.O. Box 110, Kunming, Yunnan 650216, China
5.Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
6.Department of Physics, SUPA, University of Strathclyde, Glasgow G4 0NG, UK
7.Department of Physics, Harbin Institute of Technology, Harbin 150001, China
8.College of Physical Science and Technology, Sichuan University, Chengdu 610065, China
9.Key Laboratory for Laser Plasmas (MoE) and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
10.Shanghai Institute of Laser Plasma, Shanghai 201800, China
11.Research Center for Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China
12.Center for Applied Physics and Technology, and HEDPS, Peking University, Beijing 100871, China
13.Institute of Applied Physics and Computational Mathematics, Beijing 100094, China
14.National Laboratory on High Power Lasers and Physics, Shanghai 201800, China
15.Department of Space Science and CSPAR, University of Alabama in Huntsville, Huntsville, AL 35899, USA
Recommended Citation
GB/T 7714
Zhong, J. Y.,Lin J,Li, Y. T.,et al. RELATIVISTIC ELECTRONS PRODUCED BY RECONNECTING ELECTRIC FIELDS IN A LASER-DRIVEN BENCH-TOP SOLAR FLARE[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2016,225(2).
APA Zhong, J. Y..,Lin J.,Li, Y. T..,Wang, X..,Li Y.,...&Zhang, J..(2016).RELATIVISTIC ELECTRONS PRODUCED BY RECONNECTING ELECTRIC FIELDS IN A LASER-DRIVEN BENCH-TOP SOLAR FLARE.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,225(2).
MLA Zhong, J. Y.,et al."RELATIVISTIC ELECTRONS PRODUCED BY RECONNECTING ELECTRIC FIELDS IN A LASER-DRIVEN BENCH-TOP SOLAR FLARE".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 225.2(2016).
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