Measurement of sound speed versus depth in Antarctic ice with the South Pole Acoustic Test Setup
Freija Descamps (for the IceCube Collaboration)
TL;DR
This study evaluates the acoustic properties of Antarctic ice using SPATS to inform the design of neutrino detection arrays, focusing on sound speed profiles crucial for accurate event reconstruction.
Contribution
It provides the first measurements of sound speed versus depth in Antarctic ice in the 1-100 kHz range, essential for neutrino detection accuracy.
Findings
Sound speed profiles for pressure and shear waves are characterized.
Results inform the design of acoustic neutrino detectors in Antarctic ice.
Data improve understanding of ice's acoustic refraction properties.
Abstract
The feasibility and design of an acoustic neutrino detection array in the South Pole ice depend on the acoustic properties of the ice. The South Pole Acoustic Test Setup (SPATS) was built to evaluate the acoustic characteristics of the ice in the 1 to 100kHz frequency range. The vertical sound speed profile relates to the level of refraction of the surface noise and determines the reconstruction precision of the neutrino direction. The SPATS speed of sound analysis for pressure and shear waves is presented.
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