Hypersonic velocity measurement using Brillouin scattering technique. Application to water under high pressure and temperature |
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Authors: | Decremps Frederic Datchi Frederic Polian Alain |
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Institution: | IMPMC--Physique des Milieux Denses, University of Paris VI, casier 77 Campus Boucicaut, Paris, France. frederic.decremps@upmc.fr |
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Abstract: | This paper presents recent improvement on sound velocity measurements under extreme conditions, illustrated by the hypersonic sound velocity measurements of water up to 723 K and 9 GPa using Brillouin scattering technique. Because water at high pressure and high temperature is chemically very aggressive, these experiments have been carried out using a specific experimental set-up. The present data should be useful to better constrain the water equation of state at high density. This new development brings high-quality elastic data in a large pressure/temperature domain, which may afterwards benefit the understanding of many other fields as nonlinear acoustics, underwater sound, or physical acoustics from a more general point of view. |
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