Construction, commissioning, and performance of the ENUBET demonstrator
F. Acerbi, I. Angelis, L. Bomben, M. Bonesini, F. Bramati, A. Branca, C. Brizzolari, G. Brunetti, G. T. Burton, S. Capelli, M. Capitani, S. Carturan, M. G. Catanesi, S. Cecchini, N. Charitonidis, F. Cindolo, J. Cogan, G. Cogo, G. Collazuol, D. D'Ago, F. Dal Corso, C. Delogu, G. De Rosa, S. Dolan, A. Falcone, M. Feltre, A. Gola, D. Guffanti, L. Halić, F. Iacob, C. Jollet, A. Kallitsopoulou, B. Kliček, Y. Kudenko, Ch. Lampoudis, M. Laveder, P. Legou, S. Levorato, A. Longhin, L. Ludovici, E. Lutsenko, L. Magaletti, G. Mandrioli, S. Marangoni, A. Margotti, V. Mascagna, M. Mattiazzi, N. Mauri, J. McElwee, L. Meazza, A. Meregaglia, M. Mezzetto, L. Munteanu, M. Pari, T. Papaevangelou, E. G. Parozzi, L. Pasqualini, G. Paternoster, L. Patrizii, M. Perrin-Terrin, M. Pozzato, M. Prest, F. Pupilli, E. Radicioni, A. C. Ruggeri, G. Saibene, D. Sampsonidis, C. Scian, L. Silvestrin, G. Sirri, M. Stipčević, M. Tenti, F. Terranova, M. Torti, S. E. Tzamarias, E. Vallazza, C. Vallée
Abstract
A final full-size prototype of the instrumented decay tunnel of ENUBET, referred to as the Demonstrator, was constructed and its performance was tested during the 2022, 2023 and 2024 beam test campaigns at the CERN East Area facility. We demonstrate the full scalability of this specialized longitudinal sampling calorimeter technology, based on iron absorbers and scintillator tiles readout by wavelength-shifting fibers and SiPMs. In addition, we evaluate the channel-by- channel response and the performance in terms of electron energy resolution, linearity, and particle identification capabilities, using charged particle beams with energies up to 5 GeV. A comparison with the predictions of a GEANT4 simulation of the prototype is also presented. The results meet the requirements for neutrino monitoring through lepton identification in the decay tunnel and validate the ENUBET full simulation. Although some limitations have been identified, they can be readily addressed in future developments.
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