Energy conversion at dipolarization fronts
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
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
AMER GEOPHYSICAL UNION , 2017. Vol. 44, no 3, 1234-1242 p.
Astronomy, Astrophysics and Cosmology Geophysics
IdentifiersURN: urn:nbn:se:uu:diva-319094DOI: 10.1002/2016GL071909ISI: 000396115000006OAI: oai:DiVA.org:uu-319094DiVA: diva2:1086698
FunderSwedish National Space Board, 136/11Swedish National Infrastructure for Computing (SNIC), 2014-8-38 SNIC 2016/1-457