A potential background for the SuperCDMS SNOLAB dark matter experiment is from radon daughters that have plated out onto detector surfaces. To reach desired backgrounds, understanding plate-out rates during detector fabrication as well as mitigating radon in surrounding air is critical. A radon mitigated cleanroom planned at SNOLAB builds upon a system commissioned at the South Dakota School of Mines & Technology (SD Mines). The ultra-low radon cleanroom at SD Mines has air supplied by a vacuum-swing-adsorption radon mitigation system that has achieved >1000× reduction for a cleanroom activity consistent with zero and <0.067Bqm−3 at 90% confidence. Our simulation of this system, validated against calibration data, provides opportunity for increased understanding and optimization for this and future systems.
Cite
@article{arxiv.1708.08535,
title = {Radon Mitigation for the SuperCDMS SNOLAB Dark Matter Experiment},
author = {J. Street and R. Bunker and E. H. Miller and R. W. Schnee and S. Snyder and J. So},
journal= {arXiv preprint arXiv:1708.08535},
year = {2018}
}