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Álvarez, V.; Borges, F.I.G.M.; Cárcel, S.; Castel, J.; Cebrián, S.; Cervera, A.; Conde, C.A.N.; Dafni, T.; Dias, T.H.V.T.; Díaz, J.; Egorov, M.; Esteve, R.; Evtoukhovitch, P.; Fernandes, L.M.P.; Ferrario, P.; Ferreira, A.L.; Freitas, E.D.C.; Gehman, V.M.; Gil, A.; Goldschmidt, A.; Gómez, H.; Gómez-Cadenas, J.J.; González-Díaz, D.; Gutiérrez, R.M.; Hauptman, J.; Hernando Morata, J.A.; Herrera, D.C.; Iguaz, F.J.; Irastorza, I.G.; Jinete, M.A.; Labarga, L.; Liubarsky, I.; Lopes, J.A.M.; Lorca, D.; Losada, M.; Luzón, G.; Marí, A.; Martín-Albo, J.; Martínez, A.; Miller, T.; Moiseenko, A.; Monrabal, F.; Monteiro, C.M.B.; Mora, F.J.; Moutinho, L.M.; Muñoz Vidal, J.; Natal da Luz, H.; Navarro, G.; Nebot-Guinot, M.; Nygren, D.; Oliveira, C.A.B.; Palma, R.; Pérez, J.; Pérez Aparicio, J.L.; Renner, J.; Ripoll, L.; Rodríguez, A.; Rodríguez, J.; Santos, F.P.; dos Santos, J.M.F.; Segui, L.; Serra, L.; Shuman, D.; Simón, A.; Sofka, C.; Sorel, M.; Toledo, J.F.; Tomás, A.; Torrent, J.; Tsamalaidze, Z.; Vázquez, D.; Veloso, J.F.C.A.; Villar, J.A.; Webb, R.C.; White, J.T.; Yahlali, N.
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 04/2013, Letnik: 708Journal Article
We present the design, data and results from the NEXT prototype for Double Beta and Dark Matter (NEXT-DBDM) detector, a high-pressure gaseous natural xenon electroluminescent time projection chamber (TPC) that was built at the Lawrence Berkeley National Laboratory. It is a prototype of the planned NEXT-100 136Xe neutrino-less double beta decay (0νββ) experiment with the main objectives of demonstrating near-intrinsic energy resolution at energies up to 662keV and of optimizing the NEXT-100 detector design and operating parameters. Energy resolutions of ∼1% FWHM for 662keV gamma rays were obtained at 10 and 15atm and ∼5% FWHM for 30keV fluorescence xenon X-rays. These results demonstrate that 0.5% FWHM resolutions for the 2459keV hypothetical neutrino-less double beta decay peak are realizable. This energy resolution is a factor 7–20 better than that of the current leading 0νββ experiments using liquid xenon and thus represents a significant advancement. We present also first results from a track imaging system consisting of 64 silicon photo-multipliers recently installed in NEXT–DBDM that, along with the excellent energy resolution, demonstrates the key functionalities required for the NEXT-100 0νββ search.
