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Propriétés des Rayons Cosmiques d'Ultra Haute Energie détectés à l'Observatoire Pierre Auger

Abstract : The Pierre Auger Observatory was especially designed to obtain significant statistics on ultra high energy cosmic rays (more than 1019 eV) in order to understand their origin. It associates two detection techniques for the atmospheric showers which result from the interaction of cosmic rays with the atmosphere : fluorescence telescopes measure the longitudinal profile of the shower and an array of detectors on the ground samples the lateral distribution. After a first chapter introducing cosmic rays, the detection of atmospheric showers by the Pierre Auger Observatory is presented. The third chapter is dedicated to the description of tools that were realized as part of bringing the experiment's database into service at the IN2P3 Computing Center at Lyon. We then present the analysis of data available thanks to the installation of the engineering array (EA) on the Observatory's southern site. Initially, the recorded events allowed us to study various calibration constants of the surface detectors. Subsequently, our work was devoted to the reconstruction of the events, 11 months of data were analyzed. Lastly, we present a Monte Carlo analysis performed in view of determining the nature of these cosmic rays. Three parameters of the atmospheric showers, measurable by the surface detector and providing discrimination between different primary particles, were extracted and compared with the data of the EA.
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Contributor : Catherine Eguren <>
Submitted on : Monday, March 29, 2004 - 3:36:37 PM
Last modification on : Wednesday, September 16, 2020 - 4:20:29 PM
Long-term archiving on: : Friday, April 2, 2010 - 9:01:43 PM


  • HAL Id : tel-00005481, version 1




Estelle Cormier. Propriétés des Rayons Cosmiques d'Ultra Haute Energie détectés à l'Observatoire Pierre Auger. Physique des Hautes Energies - Expérience [hep-ex]. Université Paris Sud - Paris XI, 2003. Français. ⟨tel-00005481⟩



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