We report on the cryogenic characterization of Red Green Blue - High Density
(RGBHd) SiPMs developed at Fondazione Bruno Kessler (FBK) as part of the
DS 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 RGBHd
SiPMs with low quenching resistance (RGBHdSfLRq) can be operated from
LNGSCryoSetupTemperatureRange with gains in the range DSkSiPMGainRange and
noise rates on the order of a few SI{}{hertzpersquaremm}.
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