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Electron Jet Detected by MMS at Dipolarization Front
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2018 (English)In: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 45, no 2, p. 556-564Article in journal (Refereed) 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.

Place, publisher, year, edition, pages
AMER GEOPHYSICAL UNION , 2018. Vol. 45, no 2, p. 556-564
Keywords [en]
electron jet, dipolarization front, electric field, LHD waves, electron current, energy conversion
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-223806DOI: 10.1002/2017GL076509ISI: 000425514300009Scopus ID: 2-s2.0-85041058058OAI: oai:DiVA.org:kth-223806DiVA, id: diva2:1188229
Note

QC 20180307

Available from: 2018-03-07 Created: 2018-03-07 Last updated: 2018-03-07Bibliographically approved

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Lindqvist, Per-Arne

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