A compact acoustic calibrator for ultra-high energy neutrino detection

TL;DR

This paper presents a compact acoustic transmitter array that uses the parametric effect to generate neutrino-like signals for underwater detection, demonstrating its potential for ultra-high energy neutrino observatories.

Contribution

The study introduces a novel compact acoustic calibrator utilizing the parametric effect to produce neutrino-like signals with directivity, validated through prototype design and pool measurements.

Findings

Prototype successfully generates directive bipolar signals

Simulation matches experimental propagation over 1 km

Feasibility of in situ testing in underwater neutrino telescopes

Abstract

With the aim to optimize and test the method of acoustic detection of ultra-high energy neutrinos in underwater telescopes a compact acoustic transmitter array has been developed. The acoustic parametric effect is used to reproduce the acoustic signature of an ultra-high-energy neutrino interaction. Different reseach and development studies are presented in order to show the viability of the parametric sources technique to deal with the difficulties of the acoustic signal generation: a very directive transient bipolar signal with pancake directivity. The design, construction and characterization of the prototype are described, including simulation of the propagation of an experimental signal, measured in a pool, over a distance of 1 km. Following these studies, next steps will be testing the device in situ, in underwater neutrino telescope, or from a vessel in a sea campaign.