Measurement of the Thermal Environment for ADMX-G2

The Axion Dark Matter eXperiment (ADMX) searches for axions using a haloscope operating in the sub-1K cryogenic temperature regime to reduce the noise environment for the search. Materials used to construct the detector are selected to optimize thermal conductivity to efficiently cool the detector to operating temperatures. One challenge is that low thermal conductivity of the axles which connect the piezo motors to the tuning rod can significantly increase the cool-down time of the detector. This talk will summarize measurements of the thermal performance of sapphire axles within a dilution refrigerator and characterize the performance of gold plating surface treatments applied to the axles.