Regensburg 2019 – wissenschaftliches Programm
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ST: Fachverband Strahlen- und Medizinphysik
ST 3: Gamma Imaging
ST 3.2: Vortrag
Dienstag, 2. April 2019, 10:30–10:45, Kunsthalle
Advances in a Silicon Photomultiplier Readout of a Compton Camera — •Tim Binder1,2, Maria Kawula1, Silvia Liprandi1, Giavanni Paolo Vinci1, Florian Schneider2, Katia Parodi1, and Peter G. Thirolf1 — 1Ludwig-Maximilians-Universität, Munich, Germany — 2KETEK GmbH, Munich, Germany
Silicon Photomultipliers (SiPM) have moved into the focus of a variety of applications to substitute photomultiplier tubes (PMT) due to their limitations in some areas. SiMPs can be operated in medical applications with the presence of magnetic fields, e.g. PET/MRI, or, because of their compact package size, where PMTs would introduce intolerable amounts of dead material, e.g. in a Compton camera (CC) scatter detector. Our CC prototype was developed for online range verification in hadron therapy. The absorber component of the prototype, a monolithic LaBr3:Ce crystal (read out by a multianode PMT), will alternatively be read out by SiPMs, while the currently used scatterer, consisting of six layers of double-sided silicon strip detectors (DSSSD), can alternatively be substituted by a pixelated GAGG scatterer with SiPM readout to provide common readout and data processing of the whole CC. Furthermore, a CeBr3 crystal is under investigation as a cost-effective and low-background alternative to LaBr3:Ce. In this work results of the characterization of the SiPM readout (including the readout electronics) will be presented. Furthermore, a summary of the characterization of the CeBr3 absorber will be given. This work is supported by the DFG Cluster of Excellence Munich Centre for Advanced Photonics (MAP) and the Bayerische Forschungsstiftung.