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Développement d'un système de scan automatique pour la détection des particules chargées dans OPERA et séparation des pions/muons de basse énergie

Abstract : The OPERA experiment (Oscillation Project with Emulsion t-Racking Apparatus) aims to check SuperKamiokande results, searching for tau neutrinos apparition in an originally pure muon neutrino beam, by the direct observation of the tau decay topology. The OPERA target is made of walls of bricks, whose structure consists in a sandwich of lead plates and emulsion plates. The emulsions are very precise trajectographs (~ 1 micron) which will be used in a huge quantity during the experiment. Therefore, their analysis requires an automatic and dedicated acquisition system. First, this thesis aimed to tune and to develop the first French scanning system. The performances presented showed that the precision of the system respects the OPERA requirements and its speed is expected to increase in a few months. Then, the pion/muon separation at low energies was studies and test beams, designed to answer this problem, were performed. The firs results, showing the possibility of a separation, were presented. Finalyy, a reconstruction program dedicated to these stoppping particles and taking into account the scanning efficiencies has been developed and tested.
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https://tel.archives-ouvertes.fr/tel-00011672
Contributor : Sylvie Flores <>
Submitted on : Thursday, February 23, 2006 - 1:08:53 PM
Last modification on : Tuesday, November 19, 2019 - 2:44:00 AM
Long-term archiving on: : Friday, November 25, 2016 - 10:14:11 AM

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  • HAL Id : tel-00011672, version 1

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P. Royole-Degieux. Développement d'un système de scan automatique pour la détection des particules chargées dans OPERA et séparation des pions/muons de basse énergie. Physique des Hautes Energies - Expérience [hep-ex]. Université Claude Bernard - Lyon I, 2005. Français. ⟨tel-00011672⟩

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