Speaker
Description
The KM3NeT/ARCA (KM3 Neutrino Telescope / Astroparticle Research with Cosmics in the Abyss) detector, currently under construction in the Mediterranean Sea, employs a large-scale Acoustic Positioning System (APS) to continuously monitor the positions of the detection elements with high accuracy. The APS is a distributed phased-array system composed of a large number of digital acoustic sensors integrated into the Digital Optical Modules (DOMs) and into the seafloor anchors (bases) of the Detection Units (DUs), together with a long-baseline network of acoustic emitters on the seabed. Continuous sampling at 195.3 kHz and real-time data streaming to shore enable precise monitoring of the detector geometry, which is essential for the reconstruction of neutrino directions using optical Cherenkov radiation. The system forms a densely instrumented acoustic network, with sensor positions reconstructed with an accuracy of the order of tens of centimeters. In this work, we evaluate the accuracy of the system in reconstructing the location of high-frequency acoustic sources through multi-lateration and advanced time-of-arrival techniques. These techniques are currently being investigated for their potential applicability to acoustic neutrino detection.