Currents and associated electron scattering and bouncing near the diffusion region at Earth's magnetopause

	Currents and associated electron scattering and bouncing near the diffusion region at Earth's magnetopause
	Lavraud, B.; Zhang, Y. C.; Vernisse, Y.; Gershman, D. J.; Dorelli, J.; Cassak, P. A.; Dargent, J.; Pollock, C.; Giles, B.; Aunai, N.
刊名	GEOPHYSICAL RESEARCH LETTERS
	2016
卷号	43 期号:7 页码:3042-3050
ISSN号	0094-8276
通讯作者	Lavraud, B (reprint author), Univ Toulouse, Inst Rech Astrophys & Planetol, Toulouse, France. ; Lavraud, B (reprint author), CNRS, UMR 5277, Toulouse, France.
英文摘要	Based on high-resolution measurements from NASA's Magnetospheric Multiscale mission, we present the dynamics of electrons associated with current systems observed near the diffusion region of magnetic reconnection at Earth's magnetopause. Using pitch angle distributions (PAD) and magnetic curvature analysis, we demonstrate the occurrence of electron scattering in the curved magnetic field of the diffusion region down to energies of 20 eV. We show that scattering occurs closer to the current sheet as the electron energy decreases. The scattering of inflowing electrons, associated with field-aligned electrostatic potentials and Hall currents, produces a new population of scattered electrons with broader PAD which bounce back and forth in the exhaust. Except at the center of the diffusion region the two populations are collocated and appear to behave adiabatically: the inflowing electron PAD focuses inward (toward lower magnetic field), while the bouncing population PAD gradually peaks at 90 degrees away from the center (where it mirrors owing to higher magnetic field and probable field-aligned potentials).
收录类别	SCI
语种	英语
内容类型	期刊论文
源URL	[http://ir.nssc.ac.cn/handle/122/5437]
专题	国家空间科学中心_空间科学部
推荐引用方式 GB/T 7714	Lavraud, B.,Zhang, Y. C.,Vernisse, Y.,et al. Currents and associated electron scattering and bouncing near the diffusion region at Earth's magnetopause[J]. GEOPHYSICAL RESEARCH LETTERS,2016,43(7):3042-3050.
APA	Lavraud, B..,Zhang, Y. C..,Vernisse, Y..,Gershman, D. J..,Dorelli, J..,...&Yokota, S..(2016).Currents and associated electron scattering and bouncing near the diffusion region at Earth's magnetopause.GEOPHYSICAL RESEARCH LETTERS,43(7),3042-3050.
MLA	Lavraud, B.,et al."Currents and associated electron scattering and bouncing near the diffusion region at Earth's magnetopause".GEOPHYSICAL RESEARCH LETTERS 43.7(2016):3042-3050.