RELATIVISTIC ELECTRONS PRODUCED BY RECONNECTING ELECTRIC FIELDS IN A LASER-DRIVEN BENCH-TOP SOLAR FLARE

	RELATIVISTIC ELECTRONS PRODUCED BY RECONNECTING ELECTRIC FIELDS IN A LASER-DRIVEN BENCH-TOP SOLAR FLARE
	Zhong, J. Y.1,2,3; Lin, J.4 ; Li, Y. T.3,5; Wang, X.7; Li, Y.4; Zhang, K.1 ; Yuan, D. W.1; Ping, Y. L.1; Wei, H. G.1; Wang, J. Q.8
刊名	ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
	2016-08-01
卷号	225 期号:2
关键词	acceleration of particles magnetic reconnection magnetic fields plasmas
英文摘要	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.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	UNDERSTANDING PARTICLE-ACCELERATION ; GENERATED MAGNETIC-FIELDS ; RAY-IMAGING SPECTROSCOPY ; CURRENT SHEETS ; NUMERICAL EXPERIMENTS ; ENERGETIC PARTICLES ; PHYSICAL-PROPERTIES ; KAPPA-DISTRIBUTION ; 2-RIBBON FLARES ; COSMIC-RAYS
收录类别	SCI
语种	英语
WOS记录号	WOS:000382309500013
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/6789]
专题	国家天文台_光学天文研究部
作者单位	1.Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China 2.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China 3.Shanghai Jiao Tong Univ, Collaborat Innovat Ctr IFSA CICIFSA, Shanghai 200240, Peoples R China 4.Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650216, Yunnan, Peoples R China 5.Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China 6.Univ Strathclyde, Dept Phys, SUPA, Glasgow G4 0NG, Lanark, Scotland 7.Harbin Inst Technol, Dept Phys, Harbin 150001, Peoples R China 8.Sichuan Univ, Coll Phys Sci & Technol, Chengdu 610065, Peoples R China 9.Shanghai Jiao Tong Univ, Key Lab Laser Plasmas, MoE, Shanghai 200240, Peoples R China 10.Shanghai Jiao Tong Univ, Dept Phys & Astron, Shanghai 200240, Peoples R China
推荐引用方式 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).