SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 148: Si/SiPM, Pixel/Other

T 148.2: Vortrag

Donnerstag, 23. März 2023, 17:45–18:00, WIL/C307

Integration time dependence of sipm performance parameters — Katjana Neumann, Erika Garutti, Jörn Schwandt, and •Jack Rolph — Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Deutschland

The research on Silicon Photomultipliers (SiPMs) and their characteristic parameters has increased strongly due to their advantages as photon detectors. The standard way to obtain these parameters from the charge spectra of SiPMs is to fit a model based on (generalized) Poisson distributed Gaussian functions to the low light intensity response spectra. However, this method has the disadvantage that it only describes the photo-electron peaks but not the regions between them, which means that a large amount of information is lost, for example about the dark-count rate (DCR) or after-pulsing. Thus a description of the whole spectrum in a single model is practical. The Python program PeakOTron is based on a model, that describes the entire spectrum. This program has been tested on the low light intensity spectra obtained by integrating the charge at various gate lengths, for two SiPM types operated at various overvoltage. The parameters and fitted spectra determined with this method are discussed and compared to those obtained with standard methods.