SiPM cross-talk in liquid argon detectors

Abstract

SiPM-based readouts are becoming the standard for light detection in particle detectors given their superior resolution and ease of use with respect to vacuum tube photo-multipliers. However, the contributions of detection noise such as the dark rate, cross-talk, and after-pulsing may impact significantly their performance. In this work, we present the development of highly reflective single-phase argon chambers capable of light yields up to 32 photo-electrons per keV, with roughly 12 being primary photo-electrons generated by the argon scintillation, while the rest are accounted by optical cross-talk. Furthermore, the presence of compound processes results in a generalized Fano factor larger than 2 already at an over-voltage of 5 V. Finally, we present a parametrization of the optical cross-talk for the FBK NUV-HD-Cryo SiPMs at 87 K that can be extended to future detectors with tailored optical simulations.

8 pages, 8 figures

References in corpus (3)

• First Results from the DarkSide-50 Dark Matter Experiment at Laboratori Nazionali del Gran Sasso
• Wavelength shifters for applications in liquid argon detectors
• Direct comparison of PEN and TPB wavelength shifters in a liquid argon detector

Cited by in corpus (6)

• Performance of novel VUV-sensitive Silicon Photo-Multipliers for nEXO
• Performance of Hamamatsu VUV4 SiPMs for detecting liquid argon scintillation
• Very large SiPM arrays with aggregated output
• Why would you put a flashlight in a dark matter detector?
• Batch VUV4 Characterization for the SBC-LAr10 scintillating bubble chamber
• Characterization of external cross-talk from silicon photomultipliers in a liquid xenon detector