ANAIS: Status and prospects

Amaré, J. (Universidad de Zaragoza) ; Cebrián, S. (Universidad de Zaragoza) ; Cuesta, C. ; García, E. (Universidad de Zaragoza) ; Ginestra, C. ; Martínez, M. ; Oliván, M.A. (Universidad de Zaragoza) ; Ortigoza, Y. ; Ortiz de Solórzano, A. (Universidad de Zaragoza) ; Pobes, C. ; Puimedón, J. (Universidad de Zaragoza) ; Sarsa, M.L. (Universidad de Zaragoza) ; Villar, J.A. (Universidad de Zaragoza) ; Villar, P. (Universidad de Zaragoza)

Resumen: ANAIS (Annual modulation with NAI Scintillators) experiment aims to look for dark matter annual modulation with 250 kg of ultra-pure NaI(Tl) scintillators at the Canfranc Underground Laboratory (LSC), in order to confirm the DAMA/LIBRA positive signal in a model-independent way. The detector will consists in an array of close-packed single modules, each of them coupled to two high efficiency Hamamatsu photomultipliers. Two 12.5 kg each NaI(Tl) crystals provided by Alpha Spectra are currently taking data at the LSC. These modules have shown an outstanding light collection efficiency (12-16 phe/keV), about the double of that from DAMA/LIBRA phase 1 detectors, which could enable reducing the energy threshold down to 1 keVee. ANAIS crystal radiopurity goals are fulfilled for 232Th and 238U chains, assuming equilibrium, and in the case of 40K, present crystals activity (although not at the required 20 ppb level) could be acceptable. However, a 210Pb contamination out-of-equilibrium has been identified and its origin traced back, so we expect it will be avoided in next prototypes. Finally, current status and prospects of the experiment considering several exposure and background scenarios are presented.

Idioma: Inglés

DOI: 10.1016/j.nuclphysbps.2015.09.393

Año: 2016

Publicado en: Nuclear and Particle Physics Proceedings 273-275 (2016), 2366-2368
ISSN: 2405-6014

Factor impacto SCIMAGO: 0.313 - Nuclear and High Energy Physics (Q3)

Financiación: info:eu-repo/grantAgreement/ES/MINECO/Consolider-Ingenio2010-MULTI-DARK-CSD2009-00064
Financiación: info:eu-repo/grantAgreement/ES/MINECO-FEDER/FPA2011-23749

Tipo y forma: Artículo (Versión definitiva)

Área (Departamento): Área Ingen.Sistemas y Automát. (Dpto. Informát.Ingenie.Sistms.)
Área (Departamento): Área Técnica. Lab. y Talleres (Dpto. Física Teórica)
Área (Departamento): Área Óptica (Dpto. Física Aplicada)
Área (Departamento): Área Física Atóm.Molec.y Nucl. (Dpto. Física Teórica)