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<dcterms:abstract xml:lang="fr">Le sujet de la thèse vise à développer un imageur neutron portable présentant des performances de détection compatibles avec les besoins de la recherche et de l’industrie nucléaire, notamment ceux du démantèlement. Cette thèse se décompose en trois axes principaux de recherche, précédés d’une phase de recherche bibliographique. Suite à cette dernière, l’approche de localisation retenue est l‘imagerie de neutrons rapides par encodage spatial. Les détecteurs de neutrons ont été étudiés et plusieurs choix, adaptés à cette problématique, ont été retenus pour la suite de l’étude. Le premier axe est consacré aux études sur le développement d’un détecteur de neutrons sensible à la position. Le deuxième axe est lié à la conception et au prototypage d’un imageur neutronique, se reposant sur un masque codé et un détecteur Timepix modifié par une couche de paraffine. Le dernier axe concerne le déploiement et la caractérisation expérimentale de ce prototype.</dcterms:abstract>
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