Towards a liquid Argon TPC without evacuation: filling of a 6 m3 vessel with argon gas from air to ppm impurities concentration through flushing
Abstract
In this paper we present a successful experimental test of filling a volume of 6 m3 with argon gas, starting from normal ambient air and reducing the impurities content down to few parts per million (ppm) oxygen equivalent. This level of contamination was directly monitored measuring the slow component of the scintillation light of the Ar gas, which is sensitive to all sources of impurities affecting directly the argon scintillation.
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