Long-term monitoring of the ANTARES optical module efficiencies using 40K decays in sea water: The ANTARES Collaboration

Albert, A.; André, M.; Anghinolfi, M.; Anton, G.; Ardid, M.; Aubert, J. -J.; Aublin, J.; Avgitas, T.; Baret, B.; Barrios-Martí, J.; Basa, S.; Belhorma, B.; Bertin, V.; Biagi, S.; Bormuth, R.; Boumaaza, J.; Bourret, S.; Bouwhuis, M. C.; Brânzaş, H.; Bruijn, R.; Brunner, J.; Busto, J.; Capone, A.; Caramete, L.; Carr, J.; Celli, S.; Chabab, M.; El Moursli, R. Cherkaoui; Chiarusi, T.; Circella, M.; Coelho, J. A. B.; Coleiro, A.; Colomer, M.; Coniglione, R.; Costantini, H.; Coyle, P.; Creusot, A.; Díaz, A. F.; Deschamps, A.; Distefano, C.; Palma, I. Di; Domi, A.; Donzaud, C.; Dornic, D.; Drouhin, D.; Eberl, T.; El Bojaddaini, I.; El Khayati, N.; Elsässer, D.; Enzenhöfer, A.; Ettahiri, A.; Fassi, F.; Felis, I.; Ferrara, G.; Fusco, L. A.; Gay, P.; Glotin, H.; Grégoire, T.; Ruiz, R. Gracia; Graf, K.; Hallmann, S.; van Haren, H.; Heijboer, A. J.; Hello, Y.; Hernández-Rey, J. J.; Hößl, J.; Hofestädt, J.; Illuminati, G.; James, C. W.; de Jong, M.; Jongen, M.; Kadler, M.; Kalekin, O.; Katz, U.; Kouchner, A.; Kreter, M.; Kreykenbohm, I.; Kulikovskiy, V.; Lachaud, C.; Lahmann, R.; Lefèvre, D.; Leonora, E.; Levi, G.; Lotze, M.; Loucatos, S.; Marcelin, M.; Margiotta, A.; Marinelli, A.; Martínez-Mora, J. A.; Mele, R.; Melis, K.; Migliozzi, P.; Moussa, A.; Navas, S.; Nezri, E.; Nuñez, A.; Organokov, M.; Păvălaş, G. E.; Pellegrino, C.; Piattelli, P.; Popa, V.; Pradier, T.; Quinn, L.; Racca, C.; Randazzo, N.; Riccobene, G.; Sánchez-Losa, A.; Saldaña, M.; Salvadori, I.; Samtleben, D. F. E.; Sanguineti, M.; Sapienza, P.; Schüssler, F.; Spurio, M.; Stolarczyk, Th.; Taiuti, M.; Tayalati, Y.; Trovato, A.; Vallage, B.; Van Elewyck, V.; Versari, F.; Vivolo, D.; Wilms, J.; Zaborov, D.; Zornoza, J. D.; Zúñiga, J.

doi:10.1140/epjc/s10052-018-6132-2

Cherenkov light induced by radioactive decay products is one of the major sources of background light for deep-sea neutrino telescopes such as ANTARES. These decays are at the same time a powerful calibration source. Using data collected by the ANTARES neutrino telescope from mid 2008 to 2017, the time evolution of the photon detection efficiency of optical modules is studied. A modest loss of only 20% in 9 years is observed. The relative time calibration between adjacent modules is derived as well.

Long-term monitoring of the ANTARES optical module efficiencies using 40K decays in sea water: The ANTARES Collaboration

Albert, A.;André, M.;Anghinolfi, M.;Anton, G.;Ardid, M.;Aubert, J. -J.;Aublin, J.;Avgitas, T.;Baret, B.;Barrios-Martí, J.;Basa, S.;Belhorma, B.;Bertin, V.;Biagi, S.;Bormuth, R.;Boumaaza, J.;Bourret, S.;Bouwhuis, M. C.;Brânzaş, H.;Bruijn, R.;Brunner, J.;Busto, J.;Capone, A.;Caramete, L.;Carr, J.;Celli, S.;Chabab, M.;El Moursli, R. Cherkaoui;Chiarusi, T.;Circella, M.;Coelho, J. A. B.;Coleiro, A.;Colomer, M.;Coniglione, R.;Costantini, H.;Coyle, P.;Creusot, A.;Díaz, A. F.;Deschamps, A.;Distefano, C.;Palma, I. Di;Domi, A.;Donzaud, C.;Dornic, D.;Drouhin, D.;Eberl, T.;El Bojaddaini, I.;El Khayati, N.;Elsässer, D.;Enzenhöfer, A.;Ettahiri, A.;Fassi, F.;Felis, I.;Ferrara, G.;Fusco, L. A.;Gay, P.;Glotin, H.;Grégoire, T.;Ruiz, R. Gracia;Graf, K.;Hallmann, S.;van Haren, H.;Heijboer, A. J.;Hello, Y.;Hernández-Rey, J. J.;Hößl, J.;Hofestädt, J.;Illuminati, G.;James, C. W.;de Jong, M.;Jongen, M.;Kadler, M.;Kalekin, O.;Katz, U.;Kouchner, A.;Kreter, M.;Kreykenbohm, I.;Kulikovskiy, V.;Lachaud, C.;Lahmann, R.;Lefèvre, D.;Leonora, E.;Levi, G.;Lotze, M.;Loucatos, S.;Marcelin, M.;Margiotta, A.;Marinelli, A.;Martínez-Mora, J. A.;Mele, R.;Melis, K.;Migliozzi, P.;Moussa, A.;Navas, S.;Nezri, E.;Nuñez, A.;Organokov, M.;Păvălaş, G. E.;Pellegrino, C.;Piattelli, P.;Popa, V.;Pradier, T.;Quinn, L.;Racca, C.;Randazzo, N.;Riccobene, G.;Sánchez-Losa, A.;Saldaña, M.;Salvadori, I.;Samtleben, D. F. E.;Sanguineti, M.;Sapienza, P.;Schüssler, F.;Spurio, M.;Stolarczyk, Th.;Taiuti, M.;Tayalati, Y.;Trovato, A.;Vallage, B.;Van Elewyck, V.;Versari, F.;Vivolo, D.;Wilms, J.;Zaborov, D.;Zornoza, J. D.;Zúñiga, J.

2018-01-01

Abstract

Cherenkov light induced by radioactive decay products is one of the major sources of background light for deep-sea neutrino telescopes such as ANTARES. These decays are at the same time a powerful calibration source. Using data collected by the ANTARES neutrino telescope from mid 2008 to 2017, the time evolution of the photon detection efficiency of optical modules is studied. A modest loss of only 20% in 9 years is observed. The relative time calibration between adjacent modules is derived as well.