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AMANDA: status report from the 1993-94 campaign and optical properties of the South Pole ice
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1995 (English)In: Nuclear physics B, Proceedings supplements, ISSN 0920-5632, E-ISSN 1873-3832, Vol. 38, no 1-3, 287-292 p.Article in journal (Refereed) Published
Abstract [en]

We report the first results of the AMANDA detector. During the antarctic summer 1993-94 four strings were deployed between 0.8 an 1 km depth, each equipped with 20 photomultiplier tubes (PMTs). A laser source was used to investigate the optical properties of the ice in situ. We find that the ice is intrinsically extremely transparent. The measured absorption length is 59 ± 3 m, i.e. comparable with the quality of the ultra-pure water used in the IMB and Kamiokande proton-decay and neutrino experiments [1,2] and more than two times longer than the best value reported for laboratory ice [3]. Due to a residual density of air bubbles at these depths, the motion of photons in the medium is randomized. For spherical, smooth bubbles we find that, at 1 km depth, the average distance between collisions is about 25 cm. The measured inverse scattering length on bubbles decreases linearly with increasing depth in the volume of ice investigated. © 1995 Elsevier Science B.V. All rights reserved.

Place, publisher, year, edition, pages
Elsevier, 1995. Vol. 38, no 1-3, 287-292 p.
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Physical Sciences
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URN: urn:nbn:se:lnu:diva-28477DOI: 10.1016/0920-5632(94)00757-MOAI: oai:DiVA.org:lnu-28477DiVA: diva2:643799
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Source: Scopus

Available from: 2013-08-28 Created: 2013-08-26 Last updated: 2017-12-06Bibliographically approved

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Carius, Staffan

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