title: Demonstration of imaging X-ray Thomson scattering on OMEGA EP.
abstract: Foams are a common material for high-energy-density physics experiments because of low, tunable densities, and being machinable. Simulating these experiments can be difficult because the equation of state is largely unknown for shocked foams. The focus of this experiment was to develop an x-ray scattering platform for measuring the equation of state of shocked foams on OMEGA EP. The foam used in this experiment is resorcinol formaldehyde with an initial density of 0.34 g/cm3. One long-pulse (10 ns) beam drives a shock into the foam, while the remaining three UV beams with a 2 ns square pulse irradiate a nickel foil to create the x-ray backlighter. The primary diagnostic for this platform, the imaging x-ray Thomson spectrometer, spectrally resolves the scattered x-ray beam while imaging in one spatial dimension. Ray tracing analysis of the density profile gives a compression of 3 ± 1 with a shock speed of 39 ± 6 km/s. Analysis of the scattered x-ray spectra gives an upper bound temperature of 20 eV.
authors.affiliation: Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, Michigan 48109, USA.
authors.forename: Patrick X
authors.initials: PX
authors.lastname: Belancourt
authors.affiliation: Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA.
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Theobald
authors.affiliation: Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, Michigan 48109, USA.
authors.forename: Paul A
authors.initials: PA
authors.lastname: Keiter
authors.affiliation: Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA.
authors.forename: Tim J B
authors.initials: TJ
authors.lastname: Collins
authors.affiliation: Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA.
authors.forename: Mark J
authors.initials: MJ
authors.lastname: Bonino
authors.affiliation: Department of Physics, University of Oxford, Oxford OX1 2JD, United Kingdom.
authors.forename: Pawel M
authors.initials: PM
authors.lastname: Kozlowski
authors.affiliation: Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA.
authors.forename: Sean P
authors.initials: SP
authors.lastname: Regan
authors.affiliation: Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, Michigan 48109, USA.
authors.forename: R Paul
authors.initials: RP
authors.lastname: Drake