Speaker
Description
The KM3NeT infrastructure comprises two water Cherenkov detectors in
the Mediterranean Sea. Each detector is composed of multiple optical modules
that are subject to movement due to deep-sea currents. To ensure an accurate
reconstruction of neutrino events, the position and orientation of each optical
module needs to be tracked continuously. This is performed by means of a dedicated positioning system made of a set of acoustic emitters placed on the seabed,
and acoustic receivers integrated into the optical modules. The positions of the
detector elements are determined via a global fit of the acoustic data. To archive
the envisaged angular resolution of 0.05 degrees in KM3NeT/ARCA, the position of each optical module must be resolved with an accuracy better than 20 cm.
The orientations of the optical modules are determined using compass data and
need to be resolved with an accuracy of about 3 degrees. This contribution
presents the global fit method that is currently used for the positioning calibration in both KM3NeT telescopes, KM3NeT/ORCA and KM3NeT/ARCA, as
well as the status of the orientation calibration.
| Collaboration(s) | KM3NeT |
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