Measurement of the Electronegative Contaminants and Drift Electron Lifetime in the MicroBooNE Experiment

UNSPECIFIED (2016) Measurement of the Electronegative Contaminants and Drift Electron Lifetime in the MicroBooNE Experiment. Other. UNSPECIFIED.

Abstract

High-purity liquid argon is critical for the operation of a liquid argon time projection chamber (LArTPC). At MicroBooNE, we have achieved an electron drift lifetime of at least 6 ms without evacuation of the detector vessel. Measurements of the electronegative contaminants oxygen and water are described and shown as the gas and liquid argon stages of filtration progressed.