globalchange  > 科学计划与规划
DOI: 10.1002/2016GL068359
论文题名:
Currents and associated electron scattering and bouncing near the diffusion region at Earth's magnetopause
作者: Lavraud B.; Zhang Y.C.; Vernisse Y.; Gershman D.J.; Dorelli J.; Cassak P.A.; Dargent J.; Pollock C.; Giles B.; Aunai N.; Argall M.; Avanov L.; Barrie A.; Burch J.; Chandler M.; Chen L.-J.; Clark G.; Cohen I.; Coffey V.; Eastwood J.P.; Egedal J.; Eriksson S.; Ergun R.; Farrugia C.J.; Fuselier S.A.; Génot V.; Graham D.; Grigorenko E.; Hasegawa H.; Jacquey C.; Kacem I.; Khotyaintsev Y.; Macdonald E.; Magnes W.; Marchaudon A.; Mauk B.; Moore T.E.; Mukai T.; Nakamura R.; Paterson W.; Penou E.; Phan T.D.; Rager A.; Retino A.; Rong Z.J.; Russell C.T.; Saito Y.; Sauvaud J.-A.; Schwartz S.J.; Shen C.; Smith S.; Strangeway R.; Toledo-Redondo S.; Torbert R.; Turner D.L.; Wang S.; Yokota S.
刊名: Geophysical Research Letters
ISSN: 0094-9125
EISSN: 1944-8856
出版年: 2016
卷: 43, 期:7
起始页码: 3042
结束页码: 3050
语种: 英语
英文关键词: acceleration ; electrons ; Hall fields ; magnetic reconnection ; scattering
Scopus关键词: Acceleration ; Diffusion ; Electron energy levels ; Electron scattering ; Magnetic fields ; Magnetic mirrors ; Magnetism ; Magnetopause ; Magnetosphere ; NASA ; Scattering ; Electrostatic potentials ; Hall field ; High-resolution measurements ; Magnetic curvature ; Magnetic reconnections ; Magnetospheric multiscale missions ; Pitch angle distribution ; Scattered electrons ; Electrons
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° away from the center (where it mirrors owing to higher magnetic field and probable field-aligned potentials). © 2016. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84979490468&doi=10.1002%2f2016GL068359&partnerID=40&md5=44e15460f2d0206054b25715c8f06661
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被引频次[WOS]:77   [查看WOS记录]     [查看WOS中相关记录]
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10088
Appears in Collections:科学计划与规划
气候变化与战略

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作者单位: Institut de Recherche en Astrophysique et Planétologie, Université de Toulouse, Toulouse, France

Recommended Citation:
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,2016-01-01,43(7).
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