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Electron Jet Detected by MMS at Dipolarization Front
Beihang Univ, Sch Space & Environm, Beijing, Peoples R China..
Beihang Univ, Sch Space & Environm, Beijing, Peoples R China..
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutet för rymdfysik, Uppsalaavdelningen.ORCID-id: 0000-0003-1654-841x
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutet för rymdfysik, Uppsalaavdelningen.ORCID-id: 0000-0001-5550-3113
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2018 (engelsk)Inngår i: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 45, nr 2, s. 556-564Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Using MMS high-resolution measurements, we present the first observation of fast electron jet (V-e similar to 2,000 km/s) at a dipolarization front (DF) in the magnetotail plasma sheet. This jet, with scale comparable to the DF thickness (similar to 0.9 d(i)), is primarily in the tangential plane to the DF current sheet and mainly undergoes the E x B drift motion; it contributes significantly to the current system at the DF, including a localized ring-current that can modify the DF topology. Associated with this fast jet, we observed a persistent normal electric field, strong lower hybrid drift waves, and strong energy conversion at the DF. Such strong energy conversion is primarily attributed to the electron-jet-driven current (E.j(e) approximate to 2 E.j(i)), rather than the ion current suggested in previous studies.

sted, utgiver, år, opplag, sider
American Geophysical Union (AGU), 2018. Vol. 45, nr 2, s. 556-564
Emneord [en]
electron jet, dipolarization front, electric field, LHD waves, electron current, energy conversion
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Identifikatorer
URN: urn:nbn:se:uu:diva-347650DOI: 10.1002/2017GL076509ISI: 000425514300009OAI: oai:DiVA.org:uu-347650DiVA, id: diva2:1195673
Tilgjengelig fra: 2018-04-06 Laget: 2018-04-06 Sist oppdatert: 2018-04-06bibliografisk kontrollert

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