14-16 September 2015
University "La Sapienza", Physics Department
Europe/Rome timezone

Characterisation and testing of the KM3NeT acoustic positioning system

14 Sep 2015, 16:40
Aula Amaldi, 1st floor (University "La Sapienza", Physics Department)

Aula Amaldi, 1st floor

University "La Sapienza", Physics Department

Piazzale Aldo Moro, 2 - 00185 Roma - Italy


Francesco Simeone (INFN)


In underwater neutrino telescopes, the search of point-like sources through the Cherenkov detection technique requires a precise knowledge of the positions of thousands of optical sensors, spread in a volume of a few cubic kilometres. In KM3NeT the optical sensors are hosted in 700 m high semi-rigid structures, called detection units, which move under the effects of underwater currents. These movements are continuously monitored through an underwater positioning system based on acoustic emitters and receivers. In this work, the tests performed on the key elements of the positioning system are presented. In particular, the time calibration measurements made with the acoustic data acquisition system are demonstrated. Finally, the performance of the KM3NeT acoustic positioning system is evaluated in relation to the results obtained by the positioning system, developed in the framework of the SMO project for the NEMO Phase-II detection unit prototype.

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