Analysis of energy conversion processes at kinetic scales associated with a series of dipolarization fronts observed by MMS during a substorm - Archive ouverte HAL Accéder directement au contenu
Poster De Conférence Année : 2020

Analysis of energy conversion processes at kinetic scales associated with a series of dipolarization fronts observed by MMS during a substorm

Soboh Alqeeq
Olivier Le Contel
Patrick Canu
Alessandro Retinò
Thomas Chust
Laurent Mirioni

Résumé

<p>In July 2017, the MMS constellation was in the magnetotail with an apogee of 25 Earth radii<br>and an average inter-satellite distance of 10 km (i.e. at electron scales). On 23 July around<br>16:19 UT, MMS was located at the edge of the current sheet which was in a quasi-static<br>state. Then, MMS suddenly entered in the central plasma sheet and detected the local onset<br>of a small substorm as indicated by the AE index (~400 nT). Fast earthward plasma flows<br>were measured for about 1 hour starting with a period of quasi-steady flow and followed by<br>a saw-tooth like series of fast flows associated with dipolarization fronts. This plasma<br>transport sequence finished with a flow reversal still occurring close to the magnetic<br>equator. In the present study, we investigate the energy conversion processes at ion and<br>electron scales for these different phases with particular attention on the processes in the<br>vicinity of the dipolarization fronts.</p>

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Soboh Alqeeq, Olivier Le Contel, Patrick Canu, Alessandro Retinò, Thomas Chust, et al.. Analysis of energy conversion processes at kinetic scales associated with a series of dipolarization fronts observed by MMS during a substorm. EGU General Assembly 2020, May 2020, Vienna, Austria. ⟨10.5194/egusphere-egu2020-19750⟩. ⟨hal-02953918⟩
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