Purification Efficiency and Radon Emanation of Gas Purifiers used with Pure and Binary Gas Mixtures for Gaseous Dark Matter Detectors

• Published in: arXiv.org
• Main Authors: K, Altenmüller, Castel, J F, Cebrián, S, Dafní, T, Díez-Ibáñez, D, Galán, J, Galindo, J, García, J A, Irastorza, I G, Katsioulas, I, Knights, P, Luzón, G, Manthos, I, Margalejo, C, Matthews, J, Mavrokoridis, K, Mirallas, H, Neep, T, Nikolopoulos, K, Obis, L, Ortiz de Solórzano, A, Pérez, O, Philippou, B, Ward, R
• Format: Paper Journal Article
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 18.11.2022
• Subjects: Dark matter; Emission; Gas detectors; Gas mixtures; Physics - High Energy Physics - Experiment; Physics - Instrumentation and Detectors; Purification; Radon; Rare gases
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.2211.10148

Rare event searches require extreme radiopurity in all detector components. This includes the active medium, which in the case of gaseous detectors, is the operating gas. The gases used typically include noble gas mixtures with molecular quenchers. Purification of these gases is required to achieve the desired detector performance, however, purifiers are known to emanate 222 Rn, which is a potential source of background. Several purifiers are studied for their O 2 and H 2 O purification efficiency and Rn emanation rates, aiming to identify the lowest-Rn options. Furthermore, the absorption of quenchers by the purifiers is assessed when used in a recirculating closed-loop gas system.