Dynamic positioning and orientation calibration for the KM3NeT detectors

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21670%2F25%3A00389202" target="_blank" >RIV/68407700:21670/25:00389202 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.22323/1.501.1095" target="_blank" >https://doi.org/10.22323/1.501.1095</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.22323/1.501.1095" target="_blank" >10.22323/1.501.1095</a>

Result language
angličtina
Original language name
Dynamic positioning and orientation calibration for the KM3NeT detectors
Original language description
The KM3NeT infrastructure comprises two water Cherenkov detectors in the Mediterranean Sea. Each detector consists of an array of 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 monitored continuously. This is performed by means of a dedicated positioning system, composed of acoustic emitters placed on the seabed, and acoustic receivers integrated into the optical modules. The dynamic positions of the detector elements are determined via a global fit to the acoustic data. To achieve 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 three degrees. This contribution presents the global fit method that is currently used for the positioning calibration in both KM3NeT telescopes, ARCA and ORCA. The movement of the detection units is shown as a function of time and compared to sea current measurements. Furthermore, the impact of dynamic positioning calibration on the accuracy of the reconstructed direction is studied for ARCA.
Czech name
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Czech description
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Project
<a href="/en/project/LM2023063" target="_blank" >LM2023063: Laboratoire Souterrain de Modane – participation of the Czech Republic</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
39th International Cosmic Ray Conference (ICRC2025)
ISBN
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ISSN
1824-8039
e-ISSN
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Number of pages
13
Pages from-to
1-13
Publisher name
PoS - Proceedings of Science, Sissa Medialab srl
Place of publication
Trieste
Event location
Geneva
Event date
Jul 14, 2025
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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