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. ; Solórzano, A. Ortiz de (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) ; Piattelli, P. ; Capone, A. ; Coniglione, R. ; De Bonis, G. ; De Vincenzi, M. ; Distefano, C. ; Morselli, A. ; Sapienza, P.

Resumen: ANAIS experiment will look for dark matter annual modulation with large mass of ultra-pure NaI(Tl) scintillators at the Canfranc Underground Laboratory (LSC), aiming to confirm the DAMA/LIBRA positive signal in a model-independent way. Two 12.5 kg each NaI(Tl) crystals provided by Alpha Spectra are currently taking data at the LSC. Present status of ANAIS detectors background and general performance is summarized; in particular, thanks to the high light collection efficiency prospects of lowering the threshold down to 1 keVee are reachable. Crystal radiopurity goals are fulfilled for ²³²Th and ²³⁸U chains and ⁴⁰K activity, although higher than original goal, could be accepted; however, high ²¹⁰Pb contamination out-of-equilibrium has been identified. More radiopure detectors are being built by Alpha Spectra. The ongoing high quantum efficiency PMT tests and muon veto characterization are also presented. Finally, the sensitivity of the experiment for the annual modulation in the WIMP signal, assuming the already achieved threshold and background in ANAIS-25 is shown. Further improvement should be achieved by reducing both threshold and background, as expected.

Idioma: Inglés

DOI: 10.1051/EPJCONF/201612106008

Año: 2016

Publicado en: EPJ Web of Conferences 121 (2016), 06008
ISSN: 2100-014X

Financiación: info:eu-repo/grantAgreement/ES/MICINN/CPAN-CSD2007-00042
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: Article (Published version)

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)