globalchange  > 科学计划与规划
DOI: 10.1002/2016GL069877
论文题名:
Cold ion demagnetization near the X-line of magnetic reconnection
作者: Toledo-Redondo S.; André M.; Khotyaintsev Y.V.; Vaivads A.; Walsh A.; Li W.; Graham D.B.; Lavraud B.; Masson A.; Aunai N.; Divin A.; Dargent J.; Fuselier S.; Gershman D.J.; Dorelli J.; Giles B.; Avanov L.; Pollock C.; Saito Y.; Moore T.E.; Coffey V.; Chandler M.O.; Lindqvist P.-A.; Torbert R.; Russell C.T.
刊名: Geophysical Research Letters
ISSN: 0094-8945
EISSN: 1944-8676
出版年: 2016
卷: 43, 期:13
起始页码: 6759
结束页码: 6767
语种: 英语
英文关键词: magnetic reconnection
Scopus关键词: Electric fields ; Hot electrons ; Ions ; Magnetism ; Magnetosphere ; Electron diffusion ; Hall electric field ; Ion density ; Ion population ; Length scale ; Magnetic reconnections ; Magnetosheaths ; Planetary scale ; Magnetoplasma
英文摘要: Although the effects of magnetic reconnection in magnetospheres can be observed at planetary scales, reconnection is initiated at electron scales in a plasma. Surrounding the electron diffusion region, there is an Ion-Decoupling Region (IDR) of the size of the ion length scales (inertial length and gyroradius). Reconnection at the Earth's magnetopause often includes cold magnetospheric (few tens of eV), hot magnetospheric (10 keV), and magnetosheath (1 keV) ions, with different gyroradius length scales. We report observations of a subregion inside the IDR of the size of the cold ion population gyroradius (∼15 km) where the cold ions are demagnetized and accelerated parallel to the Hall electric field. Outside the subregion, cold ions follow the E × B motion together with electrons, while hot ions are demagnetized. We observe a sharp cold ion density gradient separating the two regions, which we identify as the cold and hot IDRs. ©2016. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84978880834&doi=10.1002%2f2016GL069877&partnerID=40&md5=9bdcb5409146759f3a6708bba22c82a7
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9908
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: Science Directorate, European Space Agency, ESAC, Madrid, Spain

Recommended Citation:
Toledo-Redondo S.,André M.,Khotyaintsev Y.V.,et al. Cold ion demagnetization near the X-line of magnetic reconnection[J]. Geophysical Research Letters,2016-01-01,43(13).
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