Long-term monitoring of the ANTARES optical module efficiencies using40K 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, Federico; 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.

Albert, A., André, M., Anghinolfi, M., Anton, G., Ardid, M., Aubert, J., et al. (2018). Long-term monitoring of the ANTARES optical module efficiencies using40K decays in sea water: The ANTARES Collaboration. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 78(8), 1-8 [10.1140/epjc/s10052-018-6132-2].