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Détection des gamma dans l'expérience AMS et analyse temporelle des sursauts gamma par la mission HETE-2

Abstract : AMS is a particle detector that will be launched on the International Space Station at the beginnning of 2008. With the Silicon Tracker and the Electromagnetic Calorimeter, it will be able to measure photons between 1 GeV and 300 GeV.
In the first part of this thesis, results of the analysis of the calorimeter test beam data are given. Using a fast simulation tool, the gamma detection capabilities of AMS are evaluated. Predictions are made for different astrophysical sources as well as for the supersymmetric dark matter halo around the Galactic Centre.
HETE-2 is a satellite conceived to detect and localise gamma-ray bursts (GRBs) and is curently taking data. Given the energies released, GRBs could be used to test areas of physics unreachable with accelerators.
In the second part of the thesis, we present the study of the light curves of twelve GRBs with known redshifts detected by FREGATE on board of HETE-2. By studying the time lags between photons of different energies, we are able to determine a lower limit on the quantum gravity scale of Eqg > 10^15 GeV.
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https://tel.archives-ouvertes.fr/tel-00011463
Contributor : Julien Bolmont <>
Submitted on : Friday, February 17, 2006 - 1:39:38 PM
Last modification on : Tuesday, November 19, 2019 - 9:08:02 PM
Long-term archiving on: : Friday, November 25, 2016 - 10:11:05 AM

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  • HAL Id : tel-00011463, version 2

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Julien Bolmont. Détection des gamma dans l'expérience AMS et analyse temporelle des sursauts gamma par la mission HETE-2. Cosmologie et astrophysique extra-galactique [astro-ph.CO]. Université Montpellier II - Sciences et Techniques du Languedoc, 2005. Français. ⟨tel-00011463v2⟩

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