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Fiber optic hydrophones for acoustic neutrino detection

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Author: Buis, E.J. · Doppenberg, E.J.J. · Lahmann, R. · Toet, P.M. · Vreugd, J. de
Publisher: EDP Sciences
Source:Bonis, G. deCapone, A.Di Palma, I.Perrina, C., 7th Biannual Very Large Volume Neutrino Telescope Workshop, VLVnT 2015, 14-16 September 2015, Rome, Italy, 116
Identifier: 536837
ISBN: 9782759820160
Article number: 03002
Keywords: Electronics · High Tech Systems & Materials · Industrial Innovation · Nano Technology · OPT - Optics OM - Opto-Mechatronics · TS - Technical Sciences


Cosmic neutrinos with ultra high energies can be detected acoustically using hydrophones. The detection of these neutrinos may provide crucial information about then GZK mechanism. The flux of these neutrinos, however, is expected to be low, so that a detection volume is required more than a order of magnitude larger than what has presently been realized. With a large detection volume and a large number of hydrophones, there is a need for technology that is cheap and easy to deploy. Fiber optics provide a natural way for distributed sensing. In addition, a sensor has been designed and manufactured that can be produced cost-effectively on an industrial scale. Sensitivity measurements show that the sensor is able to reach the required sea-state zero level. For a proper interpretation of the expected bipolar signals, filtering techniques should be applied to remove the effects of the unwanted resonance peaks.