Anomalous sound speed in warm dense matter
ORAL
Abstract
Recent experimental measurements reported anomalously low sound speed in liquid deuterium shocked to 200 GPa [D. Fratanduono et al, Phys. Plasmas 26, 012710 (2019)] compared to all theoretical models. This experimental sound speed is shown to coincide with the propagation speed of electrostatic perturbations corresponding to the ion-acoustic plasma mode. The thermodynamic conditions where such anomalous sound speed is expected will be described for hydrogen, beryllium, and carbon.
*This material is based upon work supported by the Department of Energy [National Nuclear Security Administration] University of Rochester "National Inertial Confinement Fusion Program" under Award Number(s) DE-NA0004144 and by the Center for Matter at Atomic Pressures (CMAP), a National Science Foundation (NSF) Physics Frontiers Center, under Award PHY-2020249.
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Presenters
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J. Ryan R Rygg
- Laboratory for Laser Energetics, University of Rochester