Münster 2017 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 27: Poster
HK 27.67: Poster
Tuesday, March 28, 2017, 16:45–18:45, F Foyer
Evaluation of a scintillator readout system based on a Silicon Photomultiplier (SiPM) Array and an ASIC-based readout system for a Compton camera — •Tim Binder1,2, S. Aldawood1,4, G. Dedes1, T. Ganka2, R. Gernhäuser5, S. Liprandi1, R. Lutter1, L. Maier5, M. Mayerhofer1,3, A. Miani1,6, K. Parodi1, F. Schneider2, and P.G Thirolf1 — 1LMU München, Germany — 2Ketek GmbH, Munich, Germany — 3Univ. Hamburg, Germany — 4King Saud Univ., Riyadh, Saudi Arabia — 5TU München, Germany — 6Univ. degli Studi di Milano, Italy
The LMU Compton camera prototype consists of a scatterer (6 layers of double-sided Si-strip detectors) and an absorber (LaBr3) with a photomultiplier tube (PMT) and NIM/VME based readout. In order to optimize the system for different applications, a set of alternative components was evaluated. Firstly, a CeBr3 crystal, providing an increased S/N ratio, due to the absence of internal radioactivity compared to LaBr3, is read out with the present electronics and the spatial resolution is determined. Secondly, a SiPM array and an ASIC-based readout system, allowing the Compton camera to be used in multimodal imaging devices (e.g. combined with MRI), is evaluated. Therefore results of nonuniformity and temperature dependence measurements of the single component’s channels, as well as for the combined system are presented. Finally, energy spectra are reconstructed and the energy resolution is compared to results from a standard readout system.
This work was supported by the DFG Cluster of Excellence Munich Centre for Advanced Photonics (MAP) and KETEK GmbH.