Radon Purge Shield Design for SuperCDMS Dark Matter Experiment

SuperCDMS is a direct dark matter detection experiment located as SNOLAB, an underground lab in a mine in Canada. The experiment utilizes ultra-pure Germanium and Silicon crystals, instrumented with charge and phonon sensors, to discern dark matter interactions. Interactions from gamma-rays from the short-lived daughters of the naturally-occurring noble gas Radon-222 would be the dominant background for SuperCDMS if there were no mitigations for it. The design of the Radon Purge Shield is intended to prevent contamination of the experiment by cavern air with high Radon concentration, as well as ensure that this clean environment is maintained during large atmospheric pressure changes in the mine. I present work on the Radon Purge system design, software development, implementation, and testing.