Salvato in:
| Autori principali: | , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2023
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| Soggetti: | |
| Accesso online: | https://arxiv.org/abs/2311.18697 |
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Sommario:
- Noble gas and liquid detectors rely on high chemical purity for successful operation. While gaseous purification has emerged as a reliable method of producing high-purity noble fluids, the requirement for large mass flows drives the development of liquid-phase purification. We constructed a medium-scale liquid argon (LAr) purification system based on a copper catalyst and 4 A molecular sieve capable of purifying 1 t of commercial LAr 5.0 to a long effective triplet lifetime of $τ_3 \sim 1.3 μ$s. We further demonstrate that a quenched effective triplet lifetime of $τ_3 \sim 1 μ$s, due to contamination by air, can be recovered in loop-mode purification to $τ_3 \sim 1.3 μ$s after > 20 volume exchanges.