Acoustic noise in deep ice and environmental conditions at the South Pole

Details Acoustic noise in deep ice and environmental conditions at the South Pole Acoustic noise in deep ice and environmental conditions at the South Pole

2008-11-07

arxiv.org/abs/0811.1099v1

Nucl.Instrum.Meth.Suppl.A604:171-174,2009

Astronomy and Astrophysics

Astrophysics

Presented at the 3rd International Workshop on the Acoustic and Radio EeV Neutrino detection Activities (ARENA 2008)

Scientific paper

10.1016/j.nima.2009.03.063

To study the acoustic properties of the Antarctic ice the South Pole Acoustic Test Setup (SPATS) was installed in the upper part of drill holes for the IceCube neutrino observatory. An important parameter for the design of a future acoustic neutrino telescope is the acoustic background noise in the ice and its spatial and temporal variations. We study the absolute noise level depth profile from SPATS data and discuss systematic uncertainties. The measured noise is very stable over one year of data taking, and we estimate the absolute noise level to be < 10 mPa in the frequency range from 10 kHz to 50 kHz at depths below 200 m. This noise level is of the same order of magnitude as observed by ocean based acoustic neutrino detection projects in good weather conditions.

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