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Développement d'un démonstrateur d'hodoscope faisceau en diamant pour le contrôle en ligne du parcours des ions en hadronthérapie

Abstract : This thesis manuscript introduces the study and development of a diamond hodoscope demonstrator conceived for spatial and temporal beam tagging in hadrontherapy. This work deals with the issue of online ion range verification, and more specifically with the improvement of prompt-gamma imaging systems. Synthetic diamond samples were chosen for their radiation hardness and fast response, enabling 100 ps time resolution that is a key issue to optimize prompt-gamma detection devices. Several crystal qualities were tested and characterized to cope with the defined goals. Characterization was carried out first at lab with the development of test benches to evaluate the charge transport properties as well as the timing and spectroscopic performances of the tested samples. Then, diamond samples were assembled as detectors to be tested on various pulsed particle beams using both photons and light ions. The first developed double-sided stripped detectors, enabling spatial localization of the ions, were also tested. The results from the different beam tests emphasized diamond’s ability to perform single ion tagging with a 98% detection efficiency and a 100 ps time resolution. A precise counting of the number of protons within a bunch was then achieved. Finally, a study at high beam current highlighted individual ion bunches counting capabilities superior to 30 MHz. The manuscript eventually introduces the design and the development of a hodoscope demonstrator made of four diamond samples arranged in a mosaic pattern. They are double-sided stripped and readout with custom broadband preamplifiers and acquisition board developed at laboratory.
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Submitted on : Wednesday, February 24, 2021 - 8:42:12 AM
Last modification on : Friday, March 25, 2022 - 9:42:34 AM
Long-term archiving on: : Tuesday, May 25, 2021 - 6:11:31 PM


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  • HAL Id : tel-03150715, version 1




Sébastien Curtoni. Développement d'un démonstrateur d'hodoscope faisceau en diamant pour le contrôle en ligne du parcours des ions en hadronthérapie. Instrumentations et Détecteurs [physics.ins-det]. Université Grenoble Alpes [2020-..], 2020. Français. ⟨NNT : 2020GRALY045⟩. ⟨tel-03150715⟩



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