title: Hypersonic velocity measurement using Brillouin scattering technique. Application to water under high pressure and temperature.
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.
authors.affiliation: IMPMC--Physique des Milieux Denses, University of Paris VI, casier 77 Campus Boucicaut, Paris, France. frederic.decremps@upmc.fr <frederic.decremps@upmc.fr>
authors.forename: Frederic
authors.initials: F
authors.lastname: Decremps
authors.forename: Frederic
authors.initials: F
authors.lastname: Datchi
authors.forename: Alain
authors.initials: A
authors.lastname: Polian