Ion beams in the plasma sheet boundary layer

doi:10.1002/2015JA021573

CORC > 北京大学 > 地球与空间科学学院

	Ion beams in the plasma sheet boundary layer
	Birn, J. ; Hesse, M. ; Runov, A. ; Zhou, X.Z.
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
	2015
关键词	ion beams energetic ions plasma sheet boundary layer substorms MAGNETIC RECONNECTION SUBSTORM RECOVERY AURORAL BULGE DISTRIBUTIONS ELECTRON MAGNETOTAIL INJECTIONS MAGNETOSPHERE ENERGIZATION ACCELERATION
DOI	10.1002/2015JA021573
英文摘要	We explore characteristics of energetic particles in the plasma sheet boundary layer associated with dipolarization events, based on simulations and observations. The simulations use the electromagnetic fields of an MHD simulation of magnetotail reconnection and flow bursts as basis for test particle tracing. They are complemented by self-consistent fully electrodynamic particle-in-cell (PIC) simulations. The test particle simulations confirm that crescent-shaped earthward flowing ion velocity distributions with strong perpendicular anisotropy can be generated as a consequence of near-tail reconnection, associated with earthward flows and propagating magnetic field dipolarization fronts. Both PIC and test particle simulations show that the ion distribution in the outflow region close to the reconnection site also consist of a beam superposed on an undisturbed population, which, however, does not show strong perpendicular anisotropy. This suggests that the crescent shape is created by quasi-adiabatic deformation from ion motion along the magnetic field toward higher field strength. The simulation results compare favorably with Time History of Events and Macroscale Interactions during Substorms observations.; U.S. Department of Energy - NASA [NNX13AD10G, NNX13AD21G]; NSF [1203711]; NASA [NAS5-0299, NNX13AF81G]; DLR contract [50 OC 0302]; ISSI; SCI(E); ARTICLE; jbirn@spacescience.org; 9; 7522-7535; 120
语种	中文
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/416469]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Birn, J.,Hesse, M.,Runov, A.,et al. Ion beams in the plasma sheet boundary layer[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2015.
APA	Birn, J.,Hesse, M.,Runov, A.,&Zhou, X.Z..(2015).Ion beams in the plasma sheet boundary layer.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS.
MLA	Birn, J.,et al."Ion beams in the plasma sheet boundary layer".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS (2015).