Amplifier Component Testing for Cryogenic Dark Matter Detectors

About 80% of the mass of the universe is believed to consist of an unknown substance called dark matter. In recent years, there has been growing interest in adapting cryogenic semiconductor detectors to search for dark matter particles with a lower mass. The recently formed Search for Particles of Light Dark Matter with Narrow-Gap Semiconductors (SPLENDOR) collaboration aims to use newly developed "quantum materials" (designer semiconductor crystals) in conjunction with state-of-the art low temperature amplifiers to explore previously inaccessible mass ranges for dark matter particles. Electronic circuit components are required to help reduce noise in the amplifier, however their characteristics can have huge variations or even outright fail under ultra-cold conditions. In this poster, we present the measured cryogenic performance (T=4K) of a variety of capacitors used in the baseline SPLENDOR amplifier design.