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Novel techniques for alpha/beta pulse shape discrimination in Borexino

Fuente: arXiv

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Detalles Bibliográficos
Autores principales:	Basilico, D., Bellini, G., Benziger, J., Biondi, R., Caccianiga, B., Calaprice, F., Caminata, A., Chepurnov, A., D'Angelo, D., Derbin, A., Di Giacintov, A., Di Marcello, V., Ding, X. F., Di Ludovico, A., Di Noto, L., Drachnev, I., Franco, D., Galbiati, C., Ghiano, C., Giammarchi, M., Goretti, A., Gromov, M., Guffanti, D., Ianni, Aldo, Ianni, Andrea, Jany, A., Kobychev, V., Korga, G., Kumaran, S., Laubenstein, M., Litvinovich, E., Lombardi, P., Lomskaya, I., Ludhova, L., Machulin, I., Martyn, J., Meroni, E., Miramonti, L., Misiaszek, M., Muratova, V., Nugmanov, R., Oberauer, L., Orekhov, V., Ortica, F., Pallavicini, M., Pelicci, L., Penek, O., Pietrofaccia, L., Pilipenko, N., Pocar, A., Raikov, G., Ranalli, M. T., Ranucci, G., Razeto, A., Re, A., Rossi, N., Schoenert, S., Semenov, D., Settanta, G., Skorokhvatov, M., Singhal, A., Smirnov, O., Sotnikov, A., Tartaglia, R., Testera, G., Unzhakov, E., Vishneva, A., Vogelaar, R. B., von Feilitzsch, F., Wojcik, M., Wurm, M., Zavatarelli, S., Zuber, K., Zuzel, G.
Formato:	Preprint
Publicado:	2023
Materias:	High Energy Physics - Experiment Solar and Stellar Astrophysics Instrumentation and Detectors
Acceso en línea:	Acceder al recurso
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

_version_	1866910527608848384
author	Basilico, D. Bellini, G. Benziger, J. Biondi, R. Caccianiga, B. Calaprice, F. Caminata, A. Chepurnov, A. D'Angelo, D. Derbin, A. Di Giacintov, A. Di Marcello, V. Ding, X. F. Di Ludovico, A. Di Noto, L. Drachnev, I. Franco, D. Galbiati, C. Ghiano, C. Giammarchi, M. Goretti, A. Gromov, M. Guffanti, D. Ianni, Aldo Ianni, Andrea Jany, A. Kobychev, V. Korga, G. Kumaran, S. Laubenstein, M. Litvinovich, E. Lombardi, P. Lomskaya, I. Ludhova, L. Machulin, I. Martyn, J. Meroni, E. Miramonti, L. Misiaszek, M. Muratova, V. Nugmanov, R. Oberauer, L. Orekhov, V. Ortica, F. Pallavicini, M. Pelicci, L. Penek, O. Pietrofaccia, L. Pilipenko, N. Pocar, A. Raikov, G. Ranalli, M. T. Ranucci, G. Razeto, A. Re, A. Rossi, N. Schoenert, S. Semenov, D. Settanta, G. Skorokhvatov, M. Singhal, A. Smirnov, O. Sotnikov, A. Tartaglia, R. Testera, G. Unzhakov, E. Vishneva, A. Vogelaar, R. B. von Feilitzsch, F. Wojcik, M. Wurm, M. Zavatarelli, S. Zuber, K. Zuzel, G.
author_facet	Basilico, D. Bellini, G. Benziger, J. Biondi, R. Caccianiga, B. Calaprice, F. Caminata, A. Chepurnov, A. D'Angelo, D. Derbin, A. Di Giacintov, A. Di Marcello, V. Ding, X. F. Di Ludovico, A. Di Noto, L. Drachnev, I. Franco, D. Galbiati, C. Ghiano, C. Giammarchi, M. Goretti, A. Gromov, M. Guffanti, D. Ianni, Aldo Ianni, Andrea Jany, A. Kobychev, V. Korga, G. Kumaran, S. Laubenstein, M. Litvinovich, E. Lombardi, P. Lomskaya, I. Ludhova, L. Machulin, I. Martyn, J. Meroni, E. Miramonti, L. Misiaszek, M. Muratova, V. Nugmanov, R. Oberauer, L. Orekhov, V. Ortica, F. Pallavicini, M. Pelicci, L. Penek, O. Pietrofaccia, L. Pilipenko, N. Pocar, A. Raikov, G. Ranalli, M. T. Ranucci, G. Razeto, A. Re, A. Rossi, N. Schoenert, S. Semenov, D. Settanta, G. Skorokhvatov, M. Singhal, A. Smirnov, O. Sotnikov, A. Tartaglia, R. Testera, G. Unzhakov, E. Vishneva, A. Vogelaar, R. B. von Feilitzsch, F. Wojcik, M. Wurm, M. Zavatarelli, S. Zuber, K. Zuzel, G.
contents	Borexino could efficiently distinguish between alpha and beta radiation in its liquid scintillator by the characteristic time profile of their scintillation pulse. This alpha/beta discrimination, first demonstrated at the tonne scale in the Counting Test Facility prototype, was used throughout the lifetime of the experiment between 2007 and 2021. With this method, alpha events are identified and subtracted from the beta-like solar neutrino events. This is particularly important in liquid scintillator as alpha scintillation is quenched many-fold. In Borexino, the prominent Po-210 decay peak was a background in the energy range of electrons scattered from Be-7 solar neutrinos. Optimal alpha-beta discrimination was achieved with a "multi-layer perceptron neural network", which its higher ability to leverage the timing information of the scintillation photons detected by the photomultiplier tubes. An event-by-event, high efficiency, stable, and uniform pulse shape discrimination was essential in characterising the spatial distribution of background in the detector. This benefited most Borexino measurements, including solar neutrinos in the \pp chain and the first direct observation of the CNO cycle in the Sun. This paper presents the key milestones in alpha/beta discrimination in Borexino as a term of comparison for current and future large liquid scintillator detectors
format	Preprint
id	arxiv_https___arxiv_org_abs_2310_11826
institution	arXiv
publishDate	2023
record_format	arxiv
spellingShingle	Novel techniques for alpha/beta pulse shape discrimination in Borexino Basilico, D. Bellini, G. Benziger, J. Biondi, R. Caccianiga, B. Calaprice, F. Caminata, A. Chepurnov, A. D'Angelo, D. Derbin, A. Di Giacintov, A. Di Marcello, V. Ding, X. F. Di Ludovico, A. Di Noto, L. Drachnev, I. Franco, D. Galbiati, C. Ghiano, C. Giammarchi, M. Goretti, A. Gromov, M. Guffanti, D. Ianni, Aldo Ianni, Andrea Jany, A. Kobychev, V. Korga, G. Kumaran, S. Laubenstein, M. Litvinovich, E. Lombardi, P. Lomskaya, I. Ludhova, L. Machulin, I. Martyn, J. Meroni, E. Miramonti, L. Misiaszek, M. Muratova, V. Nugmanov, R. Oberauer, L. Orekhov, V. Ortica, F. Pallavicini, M. Pelicci, L. Penek, O. Pietrofaccia, L. Pilipenko, N. Pocar, A. Raikov, G. Ranalli, M. T. Ranucci, G. Razeto, A. Re, A. Rossi, N. Schoenert, S. Semenov, D. Settanta, G. Skorokhvatov, M. Singhal, A. Smirnov, O. Sotnikov, A. Tartaglia, R. Testera, G. Unzhakov, E. Vishneva, A. Vogelaar, R. B. von Feilitzsch, F. Wojcik, M. Wurm, M. Zavatarelli, S. Zuber, K. Zuzel, G. High Energy Physics - Experiment Solar and Stellar Astrophysics Instrumentation and Detectors Borexino could efficiently distinguish between alpha and beta radiation in its liquid scintillator by the characteristic time profile of their scintillation pulse. This alpha/beta discrimination, first demonstrated at the tonne scale in the Counting Test Facility prototype, was used throughout the lifetime of the experiment between 2007 and 2021. With this method, alpha events are identified and subtracted from the beta-like solar neutrino events. This is particularly important in liquid scintillator as alpha scintillation is quenched many-fold. In Borexino, the prominent Po-210 decay peak was a background in the energy range of electrons scattered from Be-7 solar neutrinos. Optimal alpha-beta discrimination was achieved with a "multi-layer perceptron neural network", which its higher ability to leverage the timing information of the scintillation photons detected by the photomultiplier tubes. An event-by-event, high efficiency, stable, and uniform pulse shape discrimination was essential in characterising the spatial distribution of background in the detector. This benefited most Borexino measurements, including solar neutrinos in the \pp chain and the first direct observation of the CNO cycle in the Sun. This paper presents the key milestones in alpha/beta discrimination in Borexino as a term of comparison for current and future large liquid scintillator detectors
title	Novel techniques for alpha/beta pulse shape discrimination in Borexino
topic	High Energy Physics - Experiment Solar and Stellar Astrophysics Instrumentation and Detectors
url	https://arxiv.org/abs/2310.11826