Abstract: | KM3NeT is a research infrastructure located in the Mediterranean Sea, that
will consist of two deep-sea Cherenkov neutrino detectors. With one detector
(ARCA), the KM3NeT Collaboration aims at identifying and studying TeV-PeV
astrophysical neutrino sources. With the other detector (ORCA), the neutrino
mass ordering will be determined by studying GeV-scale atmospheric neutrino
oscillations. The first KM3NeT detection units were deployed at the Italian and
French sites between 2015 and 2017. In this paper, a description of the
detector is presented, together with a summary of the procedures used to
calibrate the detector in-situ. Finally, the dependence of muon rate between
$2232-3386$ m seawater depth is compared with a parameterisation of the
underwater muon flux. |