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A Sensitive Water Assay Technique and Radon Emanation System at SNOLAB
Experiments which require very low levels of background radiation are often located deep underground as the deep underground facilities provide significant rock overburden and commensurate reduction in the cosmic ray flux and cosmic ray-spallation induced products. In addition to the low background environment, these experiments also require very low background construction materials. These low background levels are required so that the current and next generation experiments can achieve the required sensitivities for their searches. SNOLAB has several facilities which are used to directly measure these ultra-low radioactive backgrounds. SNOLAB uses a sensitive assay technique to ensure the water is radiopure. SNOLAB has also developed a system to perform Radon emanation studies of materials used in the construction of different experiments. This presentation will describe such techniques.