Description
The Deep Underground Neutrino Experiment (DUNE) is a next-generation long-baseline neutrino oscillation experiment based on liquid argon time projection chamber (LArTPC) technology. DUNE's single-phase (SP) prototype ProtoDUNE-SP at CERN finished its 2-year Phase-1 running in July 2020, and successfully collected test beam and cosmic ray data. The DUNE collaboration is preparing ProtoDUNE-SP Phase-2 run which is expected to start in 2022. A key component of calibration for LArTPCs is the drift-lifetime of ionization electrons, which corrects the charge attenuation caused by electrons being captured by impurities in liquid argon. A purity monitor is a miniature TPC that measures the lifetime of electrons generated from the photocathode via the photoelectric effect. The purity monitoring system in ProtoDUNE-SP Phase-1 continuously monitored liquid argon purity, which was critical to the experiment's successful commissioning, operation, and data taking. This poster will discuss the design, implementation and results of purity monitors in ProtoDUNE-SP Phase-1, as well as the development of purity monitors for ProtoDUNE-SP Phase-2.
| Collaboration | DUNE |
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