A liquid-phase loop-mode argon purification system

Abstract 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...

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Bibliographic Details
Published inJournal of instrumentation Vol. 19; no. 3; p. C03030
Main Authors Vogl, Christoph, Schwarz, Mario, Krause, Patrick, Zuzel, Grzegorz, Schönert, Stefan
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.03.2024
Subjects
Argon
Gas systems and purification
Liquid phases
Mass flow
Molecular sieves
Noble liquid detectors (scintillation, ionization, double-phase)
Production methods
Purification
Purity
Rare gases
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Summary:Abstract 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 Å molecular sieve capable of purifying 1 t of commercial LAr 5.0 to a long effective triplet lifetime of τ 3 ∼ 1.3 μs. We further demonstrate that a quenched effective triplet lifetime of τ 3 ∼ 1 μs, due to contamination by air, can be recovered in loop-mode purification to τ 3 ∼ 1.3 μs after > 20 volume exchanges.
ISSN:1748-0221
1748-0221
DOI:10.1088/1748-0221/19/03/C03030