Gießen 2024 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 40: Instrumentation X

HK 40.5: Talk

Wednesday, March 13, 2024, 16:45–17:00, HBR 19: C 2

Noise anaylsis of Silicon photomultipliers^* — •Jan Hendrik Lietz for the CBM collaboration — Bergische Universität Wuppertal

Silicon-Photomultiplier sensors (SIPMs) have evolved over the last years, providing large photon detection efficiency (up to 60%), good spacial fill factor, and excellent timing precision (down to picosecond level). In the form of pixelated arrays (MPPC-SiPMs) they are also potentially interesting for spatially resolved single photon counting in Ring imaging Cherenkov detectors. However, the large and strongly temperature dependent dark count rate (DCR) poses severe challenges for single photon detection, in particular if combined with a self-triggered, free-streaming readout concept as it is being implemented for the CBM RICH detector at the future FAIR facility.

As a first step towards a possible future upgrade of the CBM RICH photon detector using SiPMs we have started to evaluate several sensors from different vendors. In this talk we will discuss first measurement results on the DCR and cross talk at different operating temperatures and for different bias voltages.
^* Work supported by "Netzwerke 2021", an initiative of the Ministry of Culture and Science of the State of Northrhine Westphalia.

Keywords: SiPM; RICH