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

Albert, A; Andre, M; Anghinolfi, M; Anton, G; Ardid, M; Aubert, Jj; Aublin, J; Avgitas, T; Baret, B; Barrios-Marti, J; Basa, S; Belhorma, B; Bertin, V; Biagi, S; Bormuth, R; Boumaaza, J; Bourret, S; Bouwhuis, Mc; Branzas, H; Bruijn, R; Brunner, J; Busto, J; Capone, A; Caramete, L; Carr, J; Celli, S; Chabab, M; El Moursli Rc,; Chiarusi, T; Circella, M; Jab, Coelho; Coleiro, A; Colomer, M; Coniglione, R; Costantini, H; Coyle, P; Creusot, A; Diaz, Af; Deschamps, A; Distefano, C; Di Palma, I; Domi, A; Donzaud, C; Dornic, D; Drouhin, D; Eberl, T; El Bojaddaini, I; El Khayati, N; Elsasser, D; Enzenhofer, A; Ettahiri, A; Fassi, F; Felis, I; Ferrara, G; Fusco, La; Gay, P; Glotin, H; Gregoire, T; Ruiz, Rg; Graf, K; Hallmann, S; Van Haren, H; Heijboer, Aj; Hello, Y; Hernandez-Rey, Jj; Hossl, J; Hofestadt, J; Illuminati, G; James, Cw; De Jong, M; Jongen, M; Kadler, M; Kalekin, O; Katz, U; Kouchner, A; Kreter, M; Kreykenbohm, I; Kulikovskiy, V; Lachaud, C; Lahmann, R; Lefevre, D; Leonora, E; Levi, G; Lotze, M; Loucatos, S; Marcelin, M; Margiotta, A; Marinelli, A; Martinez-Mora, Ja; Mele, R; Melis, K; Migliozzi, P; Moussa, A; Navas, S; Nezri, E; Nunez, A; Organokov, M; Pavalas, Ge; Pellegrino, C; Piattelli, P; Popa, V; Pradier, T; Quinn, L; Racca, C; Randazzo, N; Riccobene, G; Sanchez-Losa, A; Saldana, M; Salvadori, I; Dfe, Samtleben; Sanguineti, M; Sapienza, P; Schussler, F; Spurio, M; Stolarczyk, T; Taiuti, M; Tayalati, Y; Trovato, A; Vallage, B; Van Elewyck, V; Versari, F; Vivolo, D; Wilms, J; Zaborov, D; Zornoza, Jd; Zuniga, 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 K-40 decays in sea water / Albert, A., Andre, M., Anghinolfi, M., Anton, G., Ardid, M., Aubert, J.j., Aublin, J., Avgitas, T., Baret, B., Barrios-Marti, J., Basa, S., Belhorma, B., Bertin, V., Biagi, S., Bormuth, R., Boumaaza, J., Bourret, S., Bouwhuis, M.c., Branzas, H., Bruijn, R., et al.. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - 78:8(2018), pp. 669.--669.-. [10.1140/epjc/s10052-018-6132-2]