Radiopurity assessment of the tracking readout for the NEXT double beta decay experiment

Cebrián, S. (Universidad de Zaragoza) ; Pérez, J. ; Bandac, I. ; Labarga, L. ; Álvarez, V. ; Barrado, A.I. ; Bettini, A. ; Borges, F.I.G.M. ; Camargo, M. ; Cárcel, S. ; Cervera, A. ; Conde, C.A.N. ; Conde, E. ; Dafni, T. (Universidad de Zaragoza) ; Díaz, J. ; Esteve, R. ; Fernandes, L.M.P. ; Fernández, M. ; Ferrario, P. ; Ferreira, A.L. ; Freitas, E.D.C. ; Gehman, V.M. ; Goldschmidt, A. ; Gómez-Cadenas, J.J. ; González-Díaz, D. (Universidad de Zaragoza) ; Gutiérrez, R.M. ; Hauptman, J. ; Morata, J.A.H. ; Herrera, D.C. ; Irastorza, I.G. (Universidad de Zaragoza) ; Laing, A. ; Liubarsky, I. ; López-March, N. ; Lorca, D. ; Losada, M. ; Luzón, G. (Universidad de Zaragoza) ; Marí, A. ; Martín-Albo, J. ; Martínez, A. ; Martínez-Lema, G. ; Miller, T. ; Monrabal, F. ; Monserrate, M. ; Monteiro, C.M.B. ; Mora, F.J. ; Moutinho, L.M. ; Vidal, J.M. ; Nebot-Guinot, M. ; Nygren, D. ; Oliveira, C.A.B. ; Ortiz de Solórzano, A. (Universidad de Zaragoza) ; Aparicio, J.L.P. ; Querol, M. ; Renner, J. ; Ripoll, L. ; Rodríguez, J. ; Santos, F.P. ; Santos, J.M.F.D. ; Serra, L. ; Shuman, D. ; Simón, A. ; Sofka, C. ; Sorel, M. ; Toledo, J.F. ; Torrent, J. ; Tsamalaidze, Z. ; Veloso, J.F.C.A. ; Villar, J.A. (Universidad de Zaragoza) ; Webb, R.C. ; White, J.T. ; Yahlali, N.

Resumen: The ``Neutrino Experiment with a Xenon Time-Projection Chamber'' (NEXT) is intended to investigate the neutrinoless double beta decay of 136Xe, which requires a severe suppression of potential backgrounds; therefore, an extensive screening and selection process is underway to control the radiopurity levels of the materials to be used in the experimental set-up of NEXT. The detector design combines the measurement of the topological signature of the event for background discrimination with the energy resolution optimization. Separate energy and tracking readout planes are based on different sensors: photomultiplier tubes for calorimetry and silicon multi-pixel photon counters for tracking. The design of a radiopure tracking plane, in direct contact with the gas detector medium, was specially challenging since the needed components like printed circuit boards, connectors, sensors or capacitors have typically, according to available information in databases and in the literature, activities too large for experiments requiring ultra-low background conditions. Here, the radiopurity assessment of tracking readout components based on gamma-ray spectroscopy using ultra-low background germanium detectors at the Laboratorio Subterr'aneo de Canfranc (Spain) is described. According to the obtained results, radiopure enough printed circuit boards made of kapton and copper, silicon photomultipliers and other required components, fulfilling the requirement of an overall background level in the region of interest of at most 8×10-4 counts keV-1 kg-1 y-1, have been identified.

Idioma: Inglés

DOI: 10.1088/1748-0221/10/05/P05006

Año: 2015

Publicado en: Journal of Instrumentation 10, 5 (2015), [16 pp.]
ISSN: 1748-0221

Factor impacto JCR: 1.31 (2015)

Categ. JCR: INSTRUMENTS & INSTRUMENTATION rank: 28 / 56 = 0.5 (2015) - Q2 - T2

Factor impacto SCIMAGO: 0.833 - Instrumentation (Q1) - Mathematical Physics (Q2)

Financiación: info:eu-repo/grantAgreement/EC/FP7/ 240054/EU/Novel Developments in Time Projection Chambers (TPCs) for Rare Event Searches in Underground Astroparticle EXperiments/TREX
Financiación: info:eu-repo/grantAgreement/EC/FP7/339787/EU/Towards the NEXT generation of bb0nu experimets/NEXT
Financiación: info:eu-repo/grantAgreement/ES/MINECO/Consolider-Ingenio-2010/CSD2008-00037
Financiación: info:eu-repo/grantAgreement/ES/MINECO/FIS2012-37947-C04
Financiación: info:eu-repo/grantAgreement/ES/MINECO/FPA2009-13697-C04-04

Tipo y forma: Article (PostPrint)

Área (Departamento): Área Técnica. Lab. y Talleres (Dpto. Física Teórica)
Área (Departamento): Área Física Atóm.Molec.y Nucl. (Dpto. Física Teórica)