Measurements of light transmission in deep sea with the AC9 trasmissometer
Antonio Capone, Tullio Digaetano, Antonio Grimaldi, Roberto Habel, Domenico Lo Presti, Emilio Migneco, Rocco Masullo, Fulvio Moro, Marco Petruccetti, Catia Petta, Paolo Piattelli, Nunzio Randazzo, Giorgio Riccobene, Ettore Salusti, Piera Sapienza, Mario Sedita, Luciano Trasatti, Laura Ursella
Abstract
The NEMO Collaboration aims to construct an underwater Cerenkov detector in the Mediterranean Sea, able to act as a neutrino telescope. One of the main tasks of this project, which implies difficult technological challenges, is the selection of an adequate marine site. In this framework the knowledge of light transmission properties in deep seawater is extremely important. The collaboration has measured optical properties in several marine sites near the Italian coasts, at depths >3000 m, using a set-up based on a AC9, a commercial trasmissometer, manufactured by WETLabs. The results obtained for the two sites reported in this paper Alicudi and Ustica, show that deep seawater optical properties are comparable to those of the clearest waters.
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