Construction and measurements of a vacuum-swing-adsorption radon-mitigation system

الأصل · EN

Long-lived alpha and beta emitters in the ²²²Rn decay chain on (and near) detector surfaces may be the limiting background in many experiments attempting to detect dark matter or neutrinoless double-beta decay, and in screening detectors. In order to reduce backgrounds from radon-daughter plate-out onto the wires of the BetaCage during its assembly, an ultra-low-radon cleanroom is being commissioned at Syracuse University using a vacuum-swing-adsorption radon-mitigation system. The radon filter shows 20× reduction at its output, from 7.47±0.56 to 0.37±0.12 Bq/m³, and the cleanroom radon activity meets project requirements, with a lowest achieved value consistent with that of the filter, and levels consistently < 2 Bq/m³.