Long-term monitoring of the ANTARES optical module efficiencies using 40 K decays in sea water: The ANTARES Collaboration
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.
- Publication:
-
European Physical Journal C
- Pub Date:
- August 2018
- DOI:
- 10.1140/epjc/s10052-018-6132-2
- Bibcode:
- 2018EPJC...78..669A