Measurement of the group velocity of light in sea water at the ANTARES site

• Published in: Astroparticle physics Vol. 35; no. 9; pp. 552 - 557
• Main Authors: Al Samarai, I., Albert, A., Anghinolfi, M., Anton, G., Anvar, S., Assis Jesus, A.C., Astraatmadja, T., Aubert, J-J., Baret, B., Basa, S., Biagi, S., Bigi, A., Bogazzi, C., Bou-Cabo, M., Camarena, F., Carminati, G., Cecchini, S., Circella, M., Coyle, P., Curtil, C., Decowski, M.P., Dekeyser, I., Distefano, C., Dornic, D., Dorosti, Q., Eberl, T., Emanuele, U., Enzenhöfer, A., Ernenwein, J-P., Escoffier, S., Fermani, P., Flaminio, V., Fuda, J-L., Galatà, S., Gay, P., Geyer, K., Giacomelli, G., Gómez-González, J.P., Graf, K., Halladjian, G., Hallewell, G., Heijboer, A.J., Hello, Y., Hernández-Rey, J.J., Herold, B., Hößl, J., Hsu, C.C., Kadler, M., Kalekin, O., Katz, U., Kopper, C., Kouchner, A., Larosa, G., Lefèvre, D., Lim, G., Marcelin, M., McMillan, J.E., Meli, A., Montaruli, T., Motz, H., Neff, M., Nezri, E., Palioselitis, D., Păvălaş, G.E., Payet, K., Payre, P., Petrovic, J., Piattelli, P., Picot-Clemente, N., Popa, V., Pradier, T., Presani, E., Reed, C., Riccobene, G., Richardt, C., Richter, R., Rivière, C., Robert, A., Roensch, K., Rostovtsev, A., Ruiz-Rivas, J., Rujoiu, M., Samtleben, D.F.E., Sapienza, P., Schöck, F., Schuller, J-P., Schüssler, F., Shanidze, R., Spies, A., Sánchez-Losa, A., Tamburini, C., Vallage, B., Vannoni, G., Vernin, P., Wagner, S., Wijnker, G., Wilms, J., de Wolf, E., Zaborov, D., Zornoza, J.D.
• Format: Journal Article Publication
• Language: English
• Published: Elsevier B.V 01.04.2012; Elsevier
• Subjects: Acústica; ANTARES; Astrophysics; Física; High Energy Astrophysical Phenomena; Instrumentation and Methods for Astrophysic; Light; Llum; Measurement; Neutrino telescope; Optical beacon system; Physics; Refractive index; Sciences of the Universe; Speed; Velocitat; Velocity of light; Àrees temàtiques de la UPC; MED; Optical beacon system; Velocity of light; Neutrino telescope; ANTARES; Refractive index
• ISSN: 0927-6505; 1873-2852
• DOI: 10.1016/j.astropartphys.2011.12.003

► Group velocity of light measured by the ANTARES neutrino telescope in sea water. ► LEDs emit short duration flashes of different wavelengths detected by PMTs. ► Measurements show decrease of the refraction index with increasing wavelength. ► Measurements are in agreement with theoretical predictions. The group velocity of light has been measured at eight different wavelengths between 385nm and 532nm in the Mediterranean Sea at a depth of about 2.2km with the ANTARES optical beacon systems. A parametrisation of the dependence of the refractive index on wavelength based on the salinity, pressure and temperature of the sea water at the ANTARES site is in good agreement with these measurements.