Gießen 2024 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 40: Instrumentation X

HK 40.4: Talk

Wednesday, March 13, 2024, 16:30–16:45, HBR 19: C 2

Characterization and trigger system of a SiPM-based RICH camera prototype — •Jesús Peña Rodríguez for the CBM collaboration — Bergische Universität Wuppertal, Wuppertal, Germany

Ring Imaging Cherenkov detectors are moving towards new photodetection technologies to explore more accurate timing, spatial and amplitude resolutions. Silicon photomultipliers (SiPMs) can play such a role, traditionally played by vacuum-based photomultiplier tubes. SiPMs measure light intensities down to single photon-level with picosecond timing percision. Their photodetection efficiency surpasses those of traditional vacuum-based photomultiplier tubes, reaching up to 50% (even 60% in Near Ultra-Violet). The main SiPM drawbacks are temperature dependency and high dark count rates. In this talk, we present the noise characterization (dark count, afterpulse and crosstalk) and temperature dependency of three different SiPMs. In addition, we analyze the performance of the coincidence-based trigger system of a 4 x 4 SiPM matrix.

*Work supported by BMBF 05P21PXFC1, "Netzwerke 2021", an initiative of the Ministry of Culture and Science of the State of Northrhine Westphalia, and GSI.

Keywords: Silicon Photomultiplier; Ring Imaging Cherenkov; Triggering; Dark count