Münster 2017 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 26: Instrumentation V

HK 26.5: Vortrag

Dienstag, 28. März 2017, 15:15–15:30, F 102

Precision Measurements of Quenching and Saturation Effects in Organic Scintillators Coupled to Silicon Photomultipliers — •Thomas Pöschl, Martin J. Losekamm, Daniel Greenwald, and Stephan Paul — Technische Universität München, 85748 Garching, Deutschland

Measuring the energy deposition of charged particles in scintillators is a common detection and identification method in particle physics. In the last years, the development of ultra-sensitive silicon photomultipliers (SiPMs) accelerated the development and allowed to diversify the applications for such detectors. The conversion of electronic energy loss by a traversing charged particle into scintillation light and its subsequent detection implicate several loss mechanisms that require precise understanding to determine properties of the primary particle.

These signal-loss mechanisms have been determined using different scintillator-SiPM combinations exposed to protons and pions with momenta of 240 MeV/c to 450 MeV/c. Using Bayesian Inference techniques, we have determined the individual loss-mechanisms and their correlations in detail. The results will improve the current implementations of these mechanisms in simulation tools such as Geant4. This research was supported by the DFG Cluster of excellence 'Origin and Structure of the Universe' (www.universe-cluster.de).