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AMADEUS - The Acoustic Neutrino Detection Test System of the Deep-Sea ANTARES Neutrino Telescope

J.A. Aguilar Imen Al Samarai 1 A. Albert 2 M. Anghinolfi G. Anton S. Anvar 3 M. Ardid A.C. Assis Jesus T. Astraatmadja J.-J. Aubert 1 R. Auer E. Barbarito B. Baret 4 S. Basa 5 M. Bazzotti V. Bertin 1 S. Biagi C. Bigongiari M. Bou-Cabo M.C. Bouwhuis A. Brown 1 J. Brunner 1 J. Busto 1 F. Camarena A. Capone G. Carminati J. Carr 1 B. Cassano E. Castorina V. Cavasinni S. Cecchini A. Ceres Ph. Charvis 6 T. Chiarusi N. Chon Sen 2 M. Circella R. Coniglione H. Costantini N. Cottini P. Coyle 1 C. Curtil 1 G. de Bonis M.P. Decowski I. Dekeyser 7 Anne Deschamps 6 C. Distefano C. Donzaud 4 D. Dornic 1 D. Drouhin 2 T. Eberl U. Emanuele J.-P. Ernenwein 1 S. Escoffier 1 F. Fehr V. Flaminio U. Fritsch J.-L. Fuda 7 Pascal Gay 8 G. Giacomelli J.P. G'Omez-Gonz'Alez K. Graf G. Guillard 9 G. Halladjian 1 G. Hallewell 1 H. van Haren A.J. Heijboer E. Heine Y. Hello 6 J.J. Hern'Andez-Rey B. Herold J. H¨oßl M. de Jong N. Kalantar-Nayestanaki O. Kalekin A. Kappes U. Katz P. Keller 1 P. Kooijman C. Kopper A. Kouchner 10 W. Kretschmer R. Lahmann P. Lamare 3 G. Lambard 1 G. Larosa H. Laschinsky E H. Le Provost 3 Dominique Lefèvre 7 G. Lelaizant 1 G. Lim D. Lo Presti H. Loehner S. Loucatos 11 F. Louis 3 F. Lucarelli S. Mangano M. Marcelin 5 A. Margiotta J.A. Martinez-Mora A. Mazure 5 M. Mongelli T. Montaruli M. Morganti L. Moscoso 4, 11 H. Motz C. Naumann 11 M. Neff R. Ostasch D. Palioselitis P. Payre 1 J. Petrovic N. Picot Clémente 1 C. Picq 11 V. Popa T. Pradier 9 E. Presani C. Racca 2 A. Radu C. Reed 1 G. Riccobene C. Richardt M. Rujoiu M. Ruppi G.V. Russo F. Salesa P. Sapienza F. Schoeck J.-P. Schuller 11 R. Shanidze F. Simeone M. Spurio J.J.M. Steijger Th. Stolarczyk 11 M. Taiuti Christian Tamburini 7 L. Tasca 5 S. Toscano B. Vallage 11 V. van Elewyck 4 G. Vannoni 11 M. Vecchi P. Vernin 11 G. Wijnker E. de Wolf H. Yepes D. Zaborov J.D. Zornoza J. Z'U˜niga C. Cârloganu 8
Abstract : The AMADEUS system described in this article is integrated into the ANTARES neutrino telescope in the Mediterranean Sea and aims at the investigation of techniques for acoustic detection of neutrinos in the deep sea. Installed at water depths between 2000 and 2400m, its acoustic sensors employ piezo-electric elements for the broad-band recording of signals with frequencies ranging up to 125 kHz with typical sensitivities around −145 dB re. 1V/μPa (including preamplifier). Completed in May 2008, AMADEUS consists of six "acoustic clusters", each comprising six acoustic sensors that are arranged at distances of roughly 1m from each other. Three acoustic clusters each are installed along two vertical mechanical structures (so-called lines) of the ANTARES detector at a horizontal distance of 240m. Vertical spacings within a line range from 15m to 125m. Each cluster contains custom-designed electronics boards to amplify and digitise the acoustic data from the sensors. The data transmission to shore is done via optical fibres, using the TCP/IP protocol. An on-shore computer cluster, currently consisting of four dedicated servers, is used to process, filter and store the selected data. The daily volume of recorded data is about 10 - 20 GByte. The system is operating continuously and automatically, requiring only little human intervention. AMADEUS allows for extensive studies of both transient signals and ambient noise in the deep sea as well as signal correlations on several length scales and localisation of acoustic point sources. Thus the system is excellently suited to assess the background conditions that affect the measurement of bipolar pulses expected to originate from neutrino interactions. This in turn allows for feasibility studies of a future large-scale acoustic neutrino telescope in the Mediterranean Sea.
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J.A. Aguilar, Imen Al Samarai, A. Albert, M. Anghinolfi, G. Anton, et al.. AMADEUS - The Acoustic Neutrino Detection Test System of the Deep-Sea ANTARES Neutrino Telescope. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Elsevier, 2010, 626-627, pp.128-143. ⟨10.1016/j.nima.2010.09.053⟩. ⟨in2p3-00474914⟩

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