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Développement d'un instrument compact pour la mesure des ions et électrons thermiques dans les environnements magnétosphériques

Abstract : The Active Monitor Box of Electrostatic Risks (AMBER) is a double-head thermal plasma (positive ions and electrons) electrostatic analyser that was launched onboard the Jason-3 spacecraft in January 2016. By measuring the thermal plasma (in the energy range ~0 - 45 keV) the instrument permits, on the one hand, to determine the spacecraft electrostatic charging and the populations at its origin with operational stakes, and, on the other hand, to characterize the magnetospheric plasma environments with scientific goals. Reducing the physical resources (weight, electric consumption, and volume) of the AMBRE line of instrument is key to a potential systematic embarkation onboard various platforms (scientific or commercial), thereby augmenting the constellation of such measurements in near-Earth space. The goal of the present thesis is to conceive, develop and build an AMBRE 2 instrument prototype that meets these goals while augmenting its scientific capabilities. This new generation of instrument relies on the use of a single head which alternatively measures ions and electrons. Each AMBRE 2 sub-system was studied and designed using the best trade-off solution between overall resources and capabilities. A prototype has been built and tested in a vacuum chamber with ion and electron beams in October 2017 in order to validate its functionality.
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https://tel.archives-ouvertes.fr/tel-02089238
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Submitted on : Wednesday, April 3, 2019 - 3:33:58 PM
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Antoine Cara. Développement d'un instrument compact pour la mesure des ions et électrons thermiques dans les environnements magnétosphériques. Astrophysique [astro-ph]. Université Paul Sabatier - Toulouse III, 2018. Français. ⟨NNT : 2018TOU30046⟩. ⟨tel-02089238⟩

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