Neutrino Detection, Position Calibration and Marine Science with Acoustic Arrays in the Deep Sea

TL;DR

This paper reviews the use of deep-sea acoustic arrays for neutrino detection, position calibration, and marine science, highlighting their potential for high-energy neutrino astronomy and environmental monitoring.

Contribution

It presents the current status and future plans for acoustic neutrino detection in deep-sea arrays, emphasizing their multidisciplinary applications.

Findings

Acoustic arrays can detect ultra-high-energy neutrinos over large distances.

They serve dual purposes: neutrino detection and marine environment monitoring.

Future projects like KM3NeT aim to enhance acoustic detection capabilities.

Abstract

Arrays of acoustic receivers are an integral part of present and potential future Cherenkov neutrino telescopes in the deep sea. They measure the positions of individual detector elements which vary with time as an effect of undersea currents. At the same time, the acoustic receivers can be employed for marine science purposes, in particular for monitoring the ambient noise environment and the signals emitted by the fauna of the sea. And last but not least, they can be used for studies towards acoustic detection of ultra-high-energy neutrinos. Measuring acoustic pressure pulses in huge underwater acoustic arrays with an instrumented volume of the order of 100 km^3 is a promising approach for the detection of cosmic neutrinos with energies exceeding 1 EeV. Pressure signals are produced by the particle cascades that evolve when neutrinos interact with nuclei in water, and can be detected over large distances in the kilometre range. In this article, the status of acoustic detection will be reviewed and plans for the future - most notably in the context of KM3NeT - will be discussed. The connection between neutrino detection, position calibration and marine science will be illustrated.