globalchange  > 科学计划与规划
DOI: 10.1002/2016GL069406
论文题名:
Ion demagnetization in the magnetopause current layer observed by MMS
作者: Wang S.; Chen L.-J.; Hesse M.; Gershman D.J.; Dorelli J.; Giles B.; Torbert R.B.; Pollock C.J.; Lavraud B.; Strangeway R.; Ergun R.E.; Burch J.; Avanov L.; Moore T.E.; Saito Y.
刊名: Geophysical Research Letters
ISSN: 0094-9636
EISSN: 1944-9367
出版年: 2016
卷: 43, 期:10
起始页码: 4850
结束页码: 4857
语种: 英语
英文关键词: ion demagnetization ; ion distribution functions ; ion energization ; magnetopause reconnection
Scopus关键词: Demagnetization ; Distribution functions ; Electric fields ; Electric lines ; Magnetopause ; Magnetosphere ; Current direction ; Energization ; Ion distributions ; Ion skin depth ; Ion velocity distribution function ; Magnetopause current ; Magnetospheric multiscale missions ; Ring structures ; Ions ; acceleration ; demagnetization ; electric field ; ion ; magnetic field ; magnetopause ; observational method ; outflow
英文摘要: We report ion velocity distribution functions (VDFs) observed by Magnetospheric Multiscale Mission (MMS) and present evidence for demagnetized ion Speiser motion during magnetopause reconnection. The demagnetization is observed in the vicinity of the X line, as well as near the current sheet midplane about tens of ion skin depths (di) away from the X line. Close to the X line before the outflow is built up, the VDFs are elongated, and the elongated part of VDFs rotates from the out-of-plane current direction toward the outflow directions downstream from the X line. Farther downstream, demagnetized ions exhibit a characteristic half-ring structure in the VDFs, as a result of the mixture of ions that have experienced different amounts of cyclotron turning around the magnetic field normal to the current sheet. Signatures of acceleration by electric fields are more pronounced in the VDFs near the X line than downstream. ©2016. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84971450241&doi=10.1002%2f2016GL069406&partnerID=40&md5=a4e20bc28944f1f61eed70befacfef92
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10599
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: NASA Goddard Space Flight Center, Greenbelt, MD, United States

Recommended Citation:
Wang S.,Chen L.-J.,Hesse M.,et al. Ion demagnetization in the magnetopause current layer observed by MMS[J]. Geophysical Research Letters,2016-01-01,43(10).
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