title: Comparison between x-ray scattering and velocity-interferometry measurements from shocked liquid deuterium.
abstract: The equation of state of light elements is essential to understand the structure of Jovian planets and inertial confinement fusion research. The Omega laser was used to drive a planar shock wave in the cryogenically cooled deuterium, creating warm dense matter conditions. X-ray scattering was used to determine the spectrum near the boundary of the collective and noncollective scattering regimes using a narrow band x-ray source in backscattering geometry. Our scattering spectra are thus sensitive to the individual electron motion as well as the collective plasma behavior and provide a measurement of the electron density, temperature, and ionization state. Our data are consistent with velocity-interferometry measurements previously taken on the same shocked deuterium conditions and presented by K. Falk et al. [High Energy Density Phys. 8, 76 (2012)]. This work presents a comparison of the two diagnostic systems and offers a detailed discussion of challenges encountered.
authors.affiliation: Department of Physics, Clarendon Laboratory, University of Oxford, Oxford, OX1 3PU, United Kingdom.
authors.forename: K
authors.initials: K
authors.lastname: Falk
authors.forename: S P
authors.initials: SP
authors.lastname: Regan
authors.forename: J
authors.initials: J
authors.lastname: Vorberger
authors.forename: B J B
authors.initials: BJ
authors.lastname: Crowley
authors.forename: S H
authors.initials: SH
authors.lastname: Glenzer
authors.forename: S X
authors.initials: SX
authors.lastname: Hu
authors.forename: C D
authors.initials: CD
authors.lastname: Murphy
authors.forename: P B
authors.initials: PB
authors.lastname: Radha
authors.forename: A P
authors.initials: AP
authors.lastname: Jephcoat
authors.forename: J S
authors.initials: JS
authors.lastname: Wark
authors.forename: D O
authors.initials: DO
authors.lastname: Gericke
authors.forename: G
authors.initials: G
authors.lastname: Gregori