July 27, 2015 to August 21, 2015
Nordita, Stockholm
Europe/Stockholm timezone

Suprathermal electron acceleration within flux tube at magnetic flux pile-up front

Not scheduled
132:028 (Nordita, Stockholm)

132:028

Nordita, Stockholm

Poster Workshop, August 10-14

Speaker

Dr A. Vaivads (Swedish Institute of Space Physics, Uppsala)

Description

The acceleration of energetic electrons inside magnetic pile-up regions of plasma jets in the Earth magnetotail is studied in details for one case observed by Cluster. The case has been selected based on high observed fluxes of electrons, Cluster being in the burst mode and Cluster separation being around 1000 km that is optimal for studies of ion scale physics. We show that during this event there are present two characteristic acceleration mechanisms. First, significant acceleration is achieved due to magnetic flux pile-up, consistent with betatron acceleration. Secondly, in this case magnetic island like 3D structures are forming in front of the pile-up region and we observe strong electron acceleration inside those. Energetic electrons inside magnetic island have more parallel anisotropy and thus can escape along the magnetic field from the acceleration place and can generate low altitude radio emissions as observed.

Primary author

Dr A. Vaivads (Swedish Institute of Space Physics, Uppsala)

Co-authors

Dr A. Retinò (Laboratoire de Physique des Plasmas LPP, Centre National de la Recherche Scientifique CNRS, France) Dr E. Kronberg (Max-Planck-Institut fr Sonnensystemforschung, Katlenburg-Lindau, Germany) Prof. H. Fu (Space Science Institute, School of Astronautics, Beihang University, Beijing, China) Prof. P. Daly (Max-Planck-Institut fr Sonnensystemforschung, Katlenburg-Lindau, Germany) Dr Yu. V. Khotyaintsev (Swedish Institute of Space Physics, Uppsala)

Presentation materials

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