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Energy conversion at dipolarization fronts
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2017 (English)In: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 44, no 3, 1234-1242 p.Article in journal (Refereed) Published
Abstract [en]

We use multispacecraft observations by Cluster in the Earth's magnetotail and 3-D particle-in-cell simulations to investigate conversion of electromagnetic energy at the front of a fast plasma jet. We find that the major energy conversion is happening in the Earth (laboratory) frame, where the electromagnetic energy is being transferred from the electromagnetic field to particles. This process operates in a region with size of the order several ion inertial lengths across the jet front, and the primary contribution to E . j is coming from the motional electric field and the ion current. In the frame of the front we find fluctuating energy conversion with localized loads and generators at sub-ion scales which are primarily related to the lower hybrid drift instability excited at the front; however, these provide relatively small net energy conversion.

Place, publisher, year, edition, pages
American Geophysical Union (AGU), 2017. Vol. 44, no 3, 1234-1242 p.
National Category
Computer and Information Science
Identifiers
URN: urn:nbn:se:kth:diva-204080DOI: 10.1002/2016GL071909ISI: 000396115000006ScopusID: 2-s2.0-85013001224OAI: oai:DiVA.org:kth-204080DiVA: diva2:1085464
Note

QC 20170329

Available from: 2017-03-29 Created: 2017-03-29 Last updated: 2017-03-29Bibliographically approved

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Markidis, Stefano
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