Performance of a SensL-30035-16P Silicon Photomultiplier array at liquid argon temperature

TL;DR

This study evaluates the performance of the SensL-30035-16P silicon photomultiplier array at liquid argon temperatures, highlighting its potential for use in next-generation noble liquid dark matter detection experiments.

Contribution

It provides experimental data on the SiPM array's performance at cryogenic temperatures, demonstrating its suitability for low-background scintillation light detection in dark matter searches.

Findings

High photon detection efficiency at cryogenic temperatures

Low dark count rate at liquid argon temperature

Stable operation with custom cryogenic front-end board

Abstract

Next generation multi-ton scale noble liquid experiments have the unique opportunity to discover dark matter particles at the TeV scale, reaching the sensitivity of 10^-48 cm2 in the WIMP nucleon scattering cross-section. A prerequisite will be the reduction of radiogenic background sources to negligible levels. This is only possible if ultra pure high efficiency photosensors are available for the scintillation light readout. Current experiments (e.g. Xenon, LUX, Darkside, ArDM) use cryogenic PMTs as photosensors. An attractive alternative is represented by silicon photomultiplier arrays (SiPM arrays), which show unrivalled performances in single photon detection. This paper reports on the performance of the SensL-30035-16P SiPM array and a custom made cryogenic front-end board at the liquid argon temperature.