Operation and first results of the NEXT-DEMO prototype using a silicon photomultiplier tracking array

V. Álvarez, F. I.G. Borges, S. Cárcel, J. Castel, S. Cebrián, A. Cervera, C. A.N. Conde, T. Dafni, T. H.V.T. Dias, J. Díaz, M. Egorov, R. Esteve, P. Evtoukhovitch, L. M.P. Fernandes, P. Ferrario, A. L. Ferreira, E. D.C. Freitas, V. M. Gehman, A. Gil, A. GoldschmidtH. Gómez, J. J. Gómez-Cadenas, D. González-Díaz, R. M. Gutiérrez, J. Hauptman, J. A. Hernando Morata, D. C. Herrera, F. J. Iguaz, I. G. Irastorza, M. A. Jinete, L. Labarga, A. Laing, I. Liubarsky, J. A.M. Lopes, D. Lorca, M. Losada, G. Luzón, A. Marí, J. Martín-Albo, A. Martínez, G. Martínez, T. Miller, A. Moiseenko, F. Monrabal, M. Monserrate, C. M.B. Monteiro, F. J. Mora, L. M. Moutinho, J. Muñoz Vidal, H. Natal Da Luz, G. Navarro, M. Nebot-Guinot, D. Nygren, C. A.B. Oliveira, R. Palma, J. Pérez, J. L. Pérez Aparicio, J. Renner, L. Ripoll, A. Rodríguez, J. Rodríguez, F. P. Santos, J. M.F. Dos Santos, L. Seguí, L. Serra, D. Shuman, A. Simón, C. Sofka, M. Sorel, J. F. Toledo, A. Tomás, J. Torrent, Z. Tsamalaidze, J. F.C.A. Veloso, J. A. Villar, R. Webb, J. T. White, N. Yahlali

Research output: Contribution to journalArticlepeer-review


NEXT-DEMO is a high-pressure xenon gas TPC which acts as a technological test-bed and demonstrator for the NEXT-100 neutrinoless double beta decay experiment. In its current configuration the apparatus fully implements the NEXT-100 design concept. This is an asymmetric TPC, with an energy plane made of photomultipliers and a tracking plane made of silicon photomultipliers (SiPM) coated with TPB. The detector in this new configuration has been used to reconstruct the characteristic signature of electrons in dense gas, demonstrating the ability to identify the MIP and ''blob'' regions. Moreover, the SiPM tracking plane allows for the definition of a large fiducial region in which an excellent energy resolution of 1.82% FWHM at 511 keV has been measured (a value which extrapolates to 0.83% at the xenon Qββ).

Original languageEnglish (US)
Article numberP09011
JournalJournal of Instrumentation
Issue number9
StatePublished - Sep 2013


  • Double-beta decay detectors
  • Particle tracking detectors (Gaseous detectors)
  • Pattern recognition
  • Time projection chambers
  • calibration and fitting methods
  • cluster finding

ASJC Scopus subject areas

  • Instrumentation
  • Mathematical Physics


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