Speaker
Description
The upcoming LEGEND-1000 experiment will conduct a search for Neutrinoless Double Beta-Decay with 1-ton of high purity germanium detectors enriched to >90% in $^{76}$Ge. These detectors will be deployed into liquid argon for operation using a new system known as the lock. High purity argon is critical to preserve scintillation light yield and reject background events. To measure argon purity during lock prototyping, we are developing an argon purity monitor to be deployed in-situ during lock prototyping. We aim to reach a sensitivity on the order of 10s of parts per trillion by measuring the lifetime of electrons drifted across the volume of the purity monitor. In the future, we plan to deploy the purity monitor in solid argon to measure electron mobility and drift velocity in solid argon. In this talk we highlight the design process and the underlying physics of purity monitors utilizing electron drift.