# SiPMs for cryogenic temperature

## TL;DR

This paper discusses the development and testing of silicon photomultipliers (SiPMs) optimized for cryogenic temperatures, specifically for use in liquid argon detectors in dark matter search experiments.

## Contribution

It presents advancements in SiPM technology tailored for cryogenic operation, including packaging solutions and performance evaluations of new SiPM models.

## Key findings

- Successful operation of SiPMs at 86 K
- Development of radiopure packaging for large detector arrays
- Enhanced performance of cryogenic SiPMs from FBK

## Abstract

The DarkSide-20k collaboration is preparing to equip 20 m^2 of SiPMs working in liquid argon at 86 K for the direct search of WIMPs. The collaboration had to solve many technological aspects, such as the development of SiPM optimized for operation in liquid argon, the readout of large SiPM-based detectors, the reliable packaging of more than 200000 SiPMs using radiopure materials. The packaging solutions available for cryogenic applications and the performances of the newest cryogenic extended gain SiPMs from FBK will be discussed.