Borexino, a large volume detector for low energy neutrino spectroscopy, is currently running underground at the Laboratori Nazionali del Gran Sasso, Italy. The main goal of the experiment is the real-time measurement of sub-MeV solar neutrinos, and particularly of the monoenergetic (862 keV) 7Be electron capture neutrinos, via neutrino–electron scattering in an ultra-pure liquid scintillator. This paper is mostly devoted to the description of the detector structure, the photomultipliers, the electronics, and the trigger and calibration systems. The real performance of the detector, which always meets, and sometimes exceeds, design expectations, is also shown. Some important aspects of the Borexino project, i.e. the fluid handling plants, the purification techniques and the filling procedures, are not covered in this paper and are, or will be, published elsewhere (see Introduction and Bibliography).

The Borexino detector at the Laboratori Nazionali del Gran Sasso / G. Alimonti, C. Arpesella, H. Back, M. Balata, D. Bartolomei, A. de Bellefon, G. Bellini, J. Benziger, A. Bevilacqua, D. Bondi, S. Bonetti, A. Brigatti, B. Caccianiga, L. Cadonati, F. Calaprice, C. Carraro, G. Cecchet, R. Cereseto, A. Chavarria, M. Chen, A. Chepurnov, A. Cubaiu, W. Czech, D. D’Angelo, F. Dalnoki-Veress, A. De Bari, E. De Haas, A. Derbin, M. Deutsch, A. Di Credico, A. Di Ludovico, G. Di Pietro, R. Eisenstein, F. Elisei, A. Etenko, F. von Feilitzsch, R. Fernholz, K. Fomenko, R. Ford, D. Franco, B. Freudiger, N. Gaertner, C. Galbiati, F. Gatti, S. Gazzana, V. Gehman, M. Giammarchi, D. Giugni, M. Goeger-Neff, T. Goldbrunner, A. Golubchikov, A. Goretti, C. Grieb, C. Hagner, T. Hagner, W. Hampel, E. Harding, S. Hardy, F. X. Hartmann, R. von Hentig, T. Hertrich, G. Heusser, M. Hult, A. Ianni, An. Ianni, L. Ioannucci, K. Jaenner, M. Joyce, H. de Kerret, S. Kidner, J. Kiko, T. Kirsten, V. Kobychev, G. Korga, G. Korschinek, Yu. Kozlov, D. Kryn, P. La Marche, V. Lagomarsino, M. Laubenstein, C. Lendvai, M. Leung, T. Lewke, E. Litvinovich, B. Loer, F. Loeser, P. Lombardi, L. Ludhova, I. Machulin, S. Malvezzi, A. Manco, J. Maneira, W. Maneschg, I. Manno, D. Manuzio, G. Manuzio, M. Marchelli, A. Martemianov, F. Masetti, U. Mazzucato, K. McCarty, D. McKinsey, Q. Meindl, E. Meroni, L. Miramonti, M. Misiaszek, D. Montanari, M. E. Monzani, V. Muratova, P. Musico, H. Neder, A. Nelson, L. Niedermeier, S. Nisi, L. Oberauer, M. Obolensky, M. Orsini, F. Ortica, M. Pallavicini, L. Papp, R. Parcells, S. Parmeggiano, M. Parodi, N. Pelliccia, L. Perasso, A. Pocar, R. Raghavan, G. Ranucci, W. Rau, A. Razeto, E. Resconi, P. Risso, A. Romani, D. Rountree, A. Sabelnikov, P. Saggese, R. Saldhana, C. Salvo, R. Scardaoni, D. Schimizzi, S. Schönert, K. H. Schubeck, T. Shutt, F. Siccardi, H. Simgen, M. Skorokhvatov, O. Smirnov, A. Sonnenschein, F. Soricelli, A. Sotnikov, S. Sukhotin, C. Sule, Y. Suvorov, V. Tarasenkov, R. Tartaglia, G. Testera, D. Vignaud, S. Vitale, R. B. Vogelaar, V. Vyrodov, B. Williams, M. Wojcik, R. Wordel, M. Wurm, O. Zaimidoroga, S. Zavatarelli, G. Zuzel. - In: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT. - ISSN 0168-9002. - 600:3(2009 Mar 11), pp. 568-593.

The Borexino detector at the Laboratori Nazionali del Gran Sasso

G. Bellini;S. Bonetti;B. Caccianiga;D. D’Angelo;D. Franco;E. Meroni;L. Miramonti;
2009-03-11

Abstract

Borexino, a large volume detector for low energy neutrino spectroscopy, is currently running underground at the Laboratori Nazionali del Gran Sasso, Italy. The main goal of the experiment is the real-time measurement of sub-MeV solar neutrinos, and particularly of the monoenergetic (862 keV) 7Be electron capture neutrinos, via neutrino–electron scattering in an ultra-pure liquid scintillator. This paper is mostly devoted to the description of the detector structure, the photomultipliers, the electronics, and the trigger and calibration systems. The real performance of the detector, which always meets, and sometimes exceeds, design expectations, is also shown. Some important aspects of the Borexino project, i.e. the fluid handling plants, the purification techniques and the filling procedures, are not covered in this paper and are, or will be, published elsewhere (see Introduction and Bibliography).
solar neutrino ; low background detectors ; liquid scintillators
Settore FIS/01 - Fisica Sperimentale
Settore FIS/04 - Fisica Nucleare e Subnucleare
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT
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