99362 20220425105230.0 doi 10.1088/1748-0221/15/02/P02024 sideral 117914 ART-2020-117914 eng Aalseth, C.E. Design and construction of a new detector to measure ultra-low radioactive-isotope contamination of argon 2020 Access copy available to the general public Unrestricted Large liquid argon detectors offer one of the best avenues for the detection of galactic weakly interacting massive particles (WIMPs) via their scattering on atomic nuclei. The liquid argon target allows exquisite discrimination between nuclear and electron recoil signals via pulse-shape discrimination of the scintillation signals. Atmospheric argon (AAr), however, has a naturally occurring radioactive isotope, 39Ar, a ß emitter of cosmogenic origin. For large detectors, the atmospheric 39Ar activity poses pile-up concerns. The use of argon extracted from underground wells, deprived of 39Ar, is key to the physics potential of these experiments. The DarkSide-20k dark matter search experiment will operate a dual-phase time projection chamber with 50 tonnes of radio-pure underground argon (UAr), that was shown to be depleted of 39Ar with respect to AAr by a factor larger than 1400. Assessing the 39Ar content of the UAr during extraction is crucial for the success of DarkSide-20k, as well as for future experiments of the Global Argon Dark Matter Collaboration (GADMC). This will be carried out by the DArT in ArDM experiment, a small chamber made with extremely radio-pure materials that will be placed at the centre of the ArDM detector, in the Canfranc Underground Laboratory (LSC) in Spain. The ArDM LAr volume acts as an active veto for background radioactivity, mostly ¿-rays from the ArDM detector materials and the surrounding rock. This article describes the DArT in ArDM project, including the chamber design and construction, and reviews the background required to achieve the expected performance of the detector. info:eu-repo/grantAgreement/ES/MINECO/MDM-2015-0509 info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 1.415 2020 INSTRUMENTS & INSTRUMENTATION 50 / 64 = 0.781 2020 Q4 T3 0.74 2020 Mathematical Physics 2020 Q1 Instrumentation 2020 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Abdelhakim, S. Acerbi, F. Agnes, P. Ajaj, R. Albuquerque, I.F.M. Alexander, T. Alici, A. Alton, A.K. Amaudruz, P. Ameli, F. Anstey, J. Antonioli, P. Arba, M. Arcelli, S. Ardito, R. Arnquist, I.J. Arpaia, P. Asner, D.M. Asunskis, A. Ave, M. Back, H.O. Barbaryan, V. Barrado Olmedo, A. Batignani, G. Bisogni, M.G. Bocci, V. Bondar, A. Bonfini, G. Bonivento, W. Borisova, E. Bottino, B. Boulay, M.G. Bunker, R. Bussino, S. Buzulutskov, A. Cadeddu, M. Cadoni, M. Caminata, A. Canci, N. Candela, A. Cantini, C. Caravati, M. Cariello, M. Carnesecchi, F. Carpinelli, M. Castellani, A. Castello, P. Catalanotti, S. Cataudella, V. Cavalcante, P. Cavazza, D. Cavuoti, S. Cebrian, S. Universidad de Zaragoza (orcid)0000-0002-6948-5101 Cela Ruiz, J.M. Celano, B. Cereseto, R. Cheng, W. Chepurnov, A. Cicalò, C. Cifarelli, L. Citterio, M. Coccetti, F. Cocco, A.G. Cocco, V. Colocci, M. Consiglio, L. Cossio, F. Covone, G. Crivelli, P. D''Antone, I. D''Incecco, M. D''Urso, D. da Rocha Rolo, M.D. Dadoun, O. Daniel, M. Davini, S. de Candia, A. de Cecco, S. de Deo, M. de Falco, A. de Filippis, G. de Gruttola, D. de Guido, G. de Rosa, G. Dellacasa, G. Demontis, P. DePaquale, S. Derbin, A.V. Devoto, A. Di Eusanio, F. Di Noto, L. Di Pietro, G. Di Stefano, P. Dionisi, C. Dolganov, G. Dordei, F. Downing, M. Edalatfar, F. Empl, A. Fernandez Diaz, M. Ferri, A. Filip, C. Fiorillo, G. Fomenko, K. Franceschi, A. Franco, D. Froudakis, G.E. Gabriele, F. Gabrieli, A. Galbiati, C. Garbini, M. Garcia Abia, P. Gascón Fora, D. Gendotti, A. Ghiano, C. Ghisi, A. Giagu, S. Giampa, P. Giampaolo, R.A. Giganti, C. Giorgi, M.A. Giovanetti, G.K. Gligan, M.L. Gola, A. Gorchakov, O. Grab, M. Graciani Diaz, R. Granato, F. Grassi, M. Grate, J.W. Grigoriev, G.Y. Grobov, A. Gromov, M. Guan, M. Guerra, M.B.B. Guerzoni, M. Gulino, M. Haaland, R.K. Hackett, B.R. Hallin, A. Harrop, B. Hoppe, E.W. Horikawa, S. Hosseini, B. Hubaut, F. Humble, P. Hungerford, E.V. Ianni , An. Ilyasov, A. Ippolito, V. Jillings, C. Keeter, K. Kendziora, C.L. Kim, S. Kochanek, I. Kondo, K. Kopp, G. Korablev, D. Korga, G. Kubankin, A. Kugathasan, R. Kuss, M. Kuzniak, M. la Commara, M. la Delfa, L. Lai, M. Langrock, S. Lebois, M. Lehnert, B. Levashko, N. Li, X. Liqiang, Q. Lissia, M. Lodi, G.U. Longo, G. López Manzano, R. Lussana, R. Luzzi, L. Machado, A.A. Machulin, I.N. Mandarano, A. Mapelli, L. Marcante, M. Margotti, A. Mari, S.M. Mariani, M. Maricic, J. Marinelli, M. Marras, D. Martínez, M. Universidad de Zaragoza (orcid)0000-0002-9043-4691 Martínez Morales, J.J. Martinez Rojas, A.D. Martoff, C.J. Mascia, M. Mason, J. Masoni, A. Mazzi, A. McDonald, A.B. Messina, A. Meyers, P.D. Miletic, T. Milincic, R. Moggi, A. Moioli, S. Monroe, J. Morrocchi, M. Mroz, T. Mu, W. Muratova, V.N. Murphy, S. Muscas, C. Musico, P. Nania, R. Napolitano, T. Navrer Agasson, A. Nessi, M. Nikulin, I. Oleinik, A. Oleynikov, V. 2004 390 Universidad de Zaragoza Dpto. Física Teórica Área Física Atóm.Molec.y Nucl. 15, 2 (2020), P02024 [18 pp] Journal of Instrumentation Journal of Instrumentation 1748-0221 776743 http://zaguan.unizar.es/record/99362/files/texto_completo.pdf Postprint 398412 http://zaguan.unizar.es/record/99362/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:99362 articulos driver 2022-04-25-10:35:43 ARTICLE