Vibration isolation system for cryogenic phonon-scintillation calorimeters

Abstract

Cryogen-free dilution refrigerators are getting popular for rare event searches underground due to their advantages. However, the application of a pulse tube refrigerator introduces mechanical vibration that can translate into temperature fluctuation for calorimeters. The effect is significant in particular when the sensor is attached to a large absorber. A mechanical filter is installed to isolate the calorimeters from the vibration inside a cryogen-free dilution refrigerator while meeting thermal requirements. (c) 2017 IOP Publishing Ltd and Sissa Medialab srl