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Étude de l’induction optique d’une émission laser DFB dans les scintillateurs organiques en vue d’une mesure active des rayonnements ionisants.

Maugan Michel 1
1 LCAE - Laboratoire Capteurs et Architectures Electroniques
DM2I - Département Métrologie Instrumentation & Information : DRT/LIST/DM2I
Abstract : Transducers used for nuclear measurements are divided into two groups. The first one is made of detectors based on the movement of charged carriers created during the interaction of ionizing radiation with materials (ionization chambers, semiconductors, etc.). The second comprises scintillating materials which emit light following such interaction. The present work aims at shifting the current paradigm in order to achieve an active measurement of the interactions between particles and sensor. The aim of this thesis is to investigate the response of nanostructured scintillators when excited by a primary laser beam while in the presence of ionizing radiations. It consists more precisely in optically inducing a laser emission in scintillators so as to benefit from the inherent sensitivity of this kind of wave to any kind of change in its environment. This study is at first focused on controlling the propagation of the electromagnetic waves in nanostructured media. This nanostructuration allows the channeling of the electromagnetic energy in a particular direction and at a precise wavelength and thus to amplify the transduction signal. The second part of this study is dedicated to the attempts at observing any change in the emission in an amplified regime while exposed to ionizing radiations (alpha, beta). The limitation of these sources requires the use of an electron accelerator. The conclusion of this part lays the foundation for future work and provides hypotheses regarding the effects that could be expected from the irradiation with high electron fluxes.
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https://tel.archives-ouvertes.fr/tel-01076753
Contributor : Maugan Michel <>
Submitted on : Thursday, October 23, 2014 - 8:40:04 AM
Last modification on : Monday, November 30, 2020 - 10:04:02 AM
Long-term archiving on: : Friday, April 14, 2017 - 2:08:13 PM

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  • HAL Id : tel-01076753, version 1

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Maugan Michel. Étude de l’induction optique d’une émission laser DFB dans les scintillateurs organiques en vue d’une mesure active des rayonnements ionisants.. Instrumentations et Détecteurs [physics.ins-det]. Université de Caen Basse-Normandie, 2014. Français. ⟨NNT : 2014CAEN2022⟩. ⟨tel-01076753⟩

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