# Cryogenic Characterization of FBK RGB-HD SiPMs

## TL;DR

This paper presents a detailed cryogenic characterization of FBK RGB-HD SiPMs, demonstrating their stable operation and low noise at temperatures from 40 K to 300 K, suitable for dark matter detection experiments.

## Contribution

It provides the first comprehensive cryogenic performance data of FBK RGB-HD SiPMs, including gain and noise characteristics across a wide temperature range.

## Key findings

- SiPMs operate effectively from 40 K to 300 K
- Gain ranges from 10^5 to 10^6
- Noise rates are a few Hz/mm^2

## Abstract

We report on the cryogenic characterization of Red Green Blue - High Density (RGB-HD) SiPMs developed at Fondazione Bruno Kessler (FBK) as part of the DarkSide program of dark matter searches with liquid argon time projection chambers. A dedicated setup was used to measure the primary dark noise, the correlated noise, and the gain of the SiPMs at varying temperatures. A custom-made data acquisition system and analysis software were used to precisely characterize these parameters. We demonstrate that FBK RGB-HD SiPMs with low quenching resistance (RGB-HD-LR$_q$) can be operated from 40 K to 300 K with gains in the range $10^5$ to $10^6$ and noise rates on the order of a few Hz/mm$^2$.