AUTHOR=Boulay M. G. , Camillo V. , Canci N. , Choudhary S. , Consiglio L. , Flammini A. , Galbiati C. , Ghiano C. , Gola A. , Horikawa S. , Kachru P. , Kochanek I. , Kondo K. , Korga G. , Kuźniak M. , Mazzi A. , Moharana A. , Nieradka G. , Paternoster G. , Razeto A. , Sablone D. , Thorpe T. N. , Türkoğlu C. , Wang H. , Rescigno M. , Sanfilippo S. TITLE=SiPM cross-talk in liquid argon detectors JOURNAL=Frontiers in Physics VOLUME=11 YEAR=2023 URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2023.1181400 DOI=10.3389/fphy.2023.1181400 ISSN=2296-424X 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 noise detection such as the dark rate, cross-talk, and after-pulsing (AP) may significantly impact their performance. In this work, we present the development of highly reflective single-phase argon chambers capable of displaying light yields up to 32 photo-electrons per keV, with approximately 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.