title: Viscous Rayleigh-Taylor instability experiments at high pressure and strain rate.
abstract: Experimental results showing significant reductions from classical in the Rayleigh-Taylor instability growth rate due to high pressure effective lattice viscosity are presented. Using a laser created ramped drive, vanadium samples are compressed and accelerated quasi-isentropically at approximately 1 Mbar peak pressures, while maintaining the sample in the solid state. Comparisons with simulations and theory indicate that the high pressure, high strain rate conditions trigger a phonon drag mechanism, resulting in the observed high effective lattice viscosity and strong stabilization of the Rayleigh-Taylor instability.
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: Hye-Sook
authors.initials: HS
authors.lastname: Park
authors.forename: K T
authors.initials: KT
authors.lastname: Lorenz
authors.forename: R M
authors.initials: RM
authors.lastname: Cavallo
authors.forename: S M
authors.initials: SM
authors.lastname: Pollaine
authors.forename: S T
authors.initials: ST
authors.lastname: Prisbrey
authors.forename: R E
authors.initials: RE
authors.lastname: Rudd
authors.forename: R C
authors.initials: RC
authors.lastname: Becker
authors.forename: J V
authors.initials: JV
authors.lastname: Bernier
authors.forename: B A
authors.initials: BA
authors.lastname: Remington