Hydroacoustical detection of ultra-high and extremely high energy neutrinos

Physics

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Scientific paper

Hydro-acoustic detection of ultra-high (1015 eV) and extremely high (> 1018 eV) energy cosmic neutrinos in the world's oceans, employing existing hardware is considered. The results of simulations of acoustic signals emitted by neutrino induced cascades with energies 1020-21 eV, with realistic signal propagation in the ocean, are presented. We have demonstrated that it is possible to develop a hydroacoustic detector of 1020-21 eV neutrinos (for example topological defect neutrinos) with an effective detection volume of tens of cubic kilometers using an existing array of 2400 hydrophones in the Pacific Ocean near the Kamchatka Peninsula. We further discuss the prospects of using a converted portable hydro-acoustic station of 132 hydrophones as a basic module for a deep-water acoustic neutrino telescope in the Mediterranean Sea, or elsewhere. Such a device can have a relatively low detection energy threshold of ˜ 1015 eV, enabling a search for AGN and GRB neutrinos.

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