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DTSTART;TZID=Europe/Berlin:20260528T130000
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DTSTAMP:20260501T225446
CREATED:20260226T114612Z
LAST-MODIFIED:20260427T133130Z
UID:6334-1779973200-1779976800@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Ernst-Jan Buis\, Nikhef
DESCRIPTION:Fiber optic hydrophones for acoustic neutrino detection\nThe scientific potential for detecting cosmic neutrinos with energies at or above the GZK cut-off—the energy limit for cosmic rays due to interactions with the cosmic microwave background—has been extensively discussed in the literature. The recent observation of a very high-energy event by the KM3NeT telescope has further fueled this discussion\, as it may represent the first detection of a GZK neutrino. However\, despite this remarkable result\, the extremely low expected flux of ultra-high-energy neutrinos (Eν > 10^18 eV) clearly indicates that their detection will require a telescope with an effective volume exceeding 100 km^3. Acoustic detection offers a promising approach for observing these ultra-high energy cosmic neutrinos. The sound waves generated by their energy deposition in the deep sea can propagate over many kilometers with little attenuation\, making it feasible to instrument a vast volume of water for neutrino detection. Achieving this requires the development of acoustic detection technologies capable of supporting a large-scale\, deep-sea sensor network. Fiber-optic hydrophone technology stands out as a promising candidate for such a network\, combining the necessary sensitivity to detect the faint acoustic signals from neutrino interactions with the potential for cost-effective large-scale deployment. Nikhef is actively developing this fiber-optic hydrophone technology to meet the sensitivity and operational requirements of deep-sea environments. In this presentation\, I will report on the progress of the hydrophone development and outline the plans toward a future acoustic neutrino telescope — opening a window to explore the universe beyond the GZK horizon.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2026-05-28-ernst-jan-buis/
LOCATION:ECAP Laboratory\, 00.061\, Nikolaus-Fiebiger-Str. 2\, Erlangen\, 91058\, Germany
CATEGORIES:Seminar
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