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HIGH FREQUENCY NOISE IN LAKE BAIKAL AS A BACKGROUND FOR THE ACOUSTIC DETECTION OF HIGH ENERGY NEUTRINOS

    Abstract:

    We review the ongoing work of the Baikal Collaboration on acoustic detection of super high energy neutrinos. Some results of the study of high frequency acoustic noise in Lake Baikal are presented. A lot of short impulses with different amplitudes and shapes were detected, which should be considered as a background for acoustic neutrino detection. However, most of the short impulses appear to be due to noise sound waves interference and can be eliminated by a correlation analysis. Only a few detected bipolar impulses probably were produced by quasi local sources.

    This work is supported by the Russian Ministry of Education and Science, the German Ministry of Education and Research, the Russian Fund of Fundamental Research (grants 02-02-14427, 05-02-16593), INTAS grant 2001-2309.