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	Electron Acceleration By Magnetic Islands In A Dynamically Evolved Coronal Current Sheet
	Zhang, Shaohua ; Feng, Xueshang ; Wang, Bin ; Yang, Liping ; Meng, Lifei
	2016
关键词	RECONNECTING CURRENT SHEETS PARTICLE-ACCELERATION SOLAR-FLARES X-RAY
英文摘要	This work simulated the electron acceleration by magnetic islands in a drastically evolved solar coronal current sheet via the combined 2.5-dimensional (2.5D) resistive Magnetohydrodynamics (MHD) and guiding-center approximation test-particle methods. With high magnetic Reynolds number of 10(5), the long-thin current sheet is evolved into a chain of magnetic islands, growing in size and coalescing with each other, due to tearing instability. The acceleration of electrons is studied in one typical phase when several large magnetic islands are formed. The results show that the electrons with an initial Maxwell distribution evolve into a heavy-tailed distribution and more than 20% of the electrons can be accelerated higher than 200 keV within 0.1 second and some of them can even be energized up to MeV ranges. The most energetic electrons have a tendency to be around the outer regions of the magnetic islands or to be located in the small secondary magnetic islands. We find that the acceleration and spatial distributions of the energetic electrons is caused by the trapping e ff ect of the magnetic islands and the distributions of the parallel electric field E-p.; NSFC [41204105, 41304133, 51207011]; CPCI-S(ISTP); shzhang@mail.iggcas.ac.cn; 1720
语种	英语
出处	14th International Solar Wind Conference (Solar Wind)
DOI标识	10.1063/1.4943849
内容类型	其他
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/459701]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Zhang, Shaohua,Feng, Xueshang,Wang, Bin,et al. Electron Acceleration By Magnetic Islands In A Dynamically Evolved Coronal Current Sheet. 2016-01-01.

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