Measurement of acoustic attenuation in South Pole ice
2011 (English)In: Astroparticle physics, ISSN 0927-6505, E-ISSN 1873-2852, Vol. 34, no 6, 382-393 p.Article in journal (Refereed) Published
Using the South Pole Acoustic Test Setup (SPATS) and a retrievable transmitter deployed in holes drilled for the IceCube experiment, we have measured the attenuation of acoustic signals by South Pole ice at depths between 190 m and 500 m. Three data sets, using different acoustic sources, have been analyzed and give consistent results. The method with the smallest systematic uncertainties yields an amplitude attenuation coefficient alpha = 3.20 +/- 0.57 km(-1) between 10 and 30 kHz, considerably larger than previous theoretical estimates. Expressed as an attenuation length, the analyses give a consistent result for lambda equivalent to 1/alpha of similar to 300 m with 20% uncertainty. No significant depth or frequency dependence has been found.
Place, publisher, year, edition, pages
2011. Vol. 34, no 6, 382-393 p.
Neutrino astronomy, Acoustics, South Pole, Acoustic attenuation, Ice
IdentifiersURN: urn:nbn:se:uu:diva-148656DOI: 10.1016/j.astropartphys.2010.10.003ISI: 000287068800008OAI: oai:DiVA.org:uu-148656DiVA: diva2:402677