Cryogenic Characterization of FBK RGB-HD SiPMs

Abstract

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