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Accueil > A propos du LPP > Communication > Actualités archivées > 2022 > Nicolas Aunai defended his HDR « Studying magnetic reconnection via modeling and observations in the Earth magnetosphere »

Nicolas Aunai defended his HDR « Studying magnetic reconnection via modeling and observations in the Earth magnetosphere »

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On November 28, 2022, Nicolas Aunai defended his HDR on « Studying magnetic reconnection via modeling and observations in the Earth magnetosphere »
Magnetic reconnection is a fundamental plasma process that can explosively release magnetic energy into heated and accelerated plasma flows. In our solar system, magnetic reconnection is key at all steps of the chain of events linking the Sun to the planets, from the solar corona to the magnetospheres. In these collisionless environments, magnetic reconnection is a truly multiscale process. Enabled by electron kinetic effects, its dynamics is controlled at the ion scale, and its consequences can be critical regarding the global evolution of the system it occurs in.

In his manuscript and oral presentation, Nicolas has explored these effects in the light of the work he has performed and been involved in over the last decade. He started at the dawn of the now successful NASA/Magnetospheric MultiScale mission, trying to highlight the key regions where electrons stop behaving as a fluid and determine the key effects enabling reconnection in general asymmetric systems. He made a stop at the ion scale, discussing the effects that are important to model the current sheet before and during reconnection. Finally these results will allow us to embark for a journey towards global scales and Nicolas has given an overview of recent attempts to improve our capabilities in large scale kinetic modeling and statistical analysis of in situ spacecraft measurements.

Jury :

 Aurélie Marchaudon, IRAP (reviewer)
 Christian Jacquey, IRAP (reviewer)
 Philippe Louarn, IRAP (reviewer)
 Frédéric Baudin, IAS
 Carine Briand, LESIA
 Ronan Modolo, LATMOS

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Exploitant du site : Laboratoire de Physique des Plasmas, Ecole Polytechnique route de Saclay F-91128 PALAISEAU CEDEX
Hébergeur : Laboratoire de Physique des Plasmas, Ecole Polytechnique route de Saclay F-91128 PALAISEAU CEDEX
Directeur de la publication : Directeur du LPP

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