Long-term monitoring of the ANTARES optical module efficiencies using$^{40}\mathrm{{K}}$ decays in sea water

A. Albert 1 M. André M. Anghinolfi G. Anton M. Ardid J.-J. Aubert 2 J. Aublin 3 T. Avgitas 3 B. Baret 3 J. Barrios-Martí S. Basa 4 B. Belhorma V. Bertin 2 S. Biagi R. Bormuth J. Boumaaza S. Bourret 3 M.C. Bouwhuis H. Brânzaş R. Bruijn J. Brunner 2 J. Busto 2 A. Capone L. Caramete J. Carr 2 S. Celli M. Chabab R. Cherkaoui El Moursli T. Chiarusi M. Circella J.A.B. Coelho 3 A. Coleiro 3 M. Colomer 3 R. Coniglione H. Costantini 2 P. Coyle 2 A. Creusot 3 A.F. Díaz A. Deschamps 5 C. Distefano I. Di Palma A. Domi C. Donzaud 3, 6 D. Dornic 2 D. Drouhin 1 T. Eberl I. El Bojaddaini N. El Khayati D. Elsässer A. Enzenhöfer 2 A. Ettahiri F. Fassi I. Felis G. Ferrara L.A. Fusco 3 P. Gay 7, 3 H. Glotin 8 T. Grégoire 3 R. Gracia Ruiz 1 K. Graf S. Hallmann H. van Haren A.J. Heijboer Y. Hello 5 J.J. Hernández-Rey J. Hößl J. Hofestädt G. Illuminati C.W. James M. de Jong M. Jongen M. Kadler O. Kalekin U. Katz A. Kouchner 3 M. Kreter I. Kreykenbohm V. Kulikovskiy C. Lachaud 3 R. Lahmann D. Lefèvre 9 E. Leonora G. Levi M. Lotze S. Loucatos 10, 3 M. Marcelin 4 A. Margiotta A. Marinelli J.A. Martínez-Mora R. Mele K. Melis P. Migliozzi A. Moussa S. Navas E. Nezri 4 A. Nuñez 2, 4 M. Organokov 1 G.E. Păvălaş C. Pellegrino P. Piattelli V. Popa T. Pradier 1 L. Quinn 2 C. Racca 11 N. Randazzo G. Riccobene A. Sánchez-Losa M. Saldaña I. Salvadori 2 D.F.E. Samtleben M. Sanguineti P. Sapienza F. Schüssler 10 M. Spurio Th. Stolarczyk 10 M. Taiuti Y. Tayalati A. Trovato B. Vallage 10, 3 V. van Elewyck 3 F. Versari D. Vivolo J. Wilms D. Zaborov 2 J.D. Zornoza J. Zúñiga
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.
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A. Albert, M. André, M. Anghinolfi, G. Anton, M. Ardid, et al.. Long-term monitoring of the ANTARES optical module efficiencies using$^{40}\mathrm{{K}}$ decays in sea water. Eur.Phys.J.C, 2018, 78 (8), pp.669. ⟨10.1140/epjc/s10052-018-6132-2⟩. ⟨hal-01815117⟩

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