Absolute Equation-of-State Measurement for Polystyrene from 25 to 60 Mbar Using a Spherically Converging Shock Wave

T. Döppner et al.
Phys. Rev. Lett. 121, 025001 – Published 9 July 2018

Abstract

We have developed an experimental platform for the National Ignition Facility that uses spherically converging shock waves for absolute equation-of-state (EOS) measurements along the principal Hugoniot. In this Letter, we present one indirect-drive implosion experiment with a polystyrene sample that employs radiographic compression measurements over a range of shock pressures reaching up to 60 Mbar (6 TPa). This significantly exceeds previously published results obtained on the Nova laser [R. Cauble et al., Phys. Rev. Lett. 80, 1248 (1998)] at a strongly improved precision, allowing us to discriminate between different EOS models. We find excellent agreement with Kohn-Sham density-functional-theory-based molecular dynamics simulations.

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  • Received 18 November 2016
  • Revised 1 May 2018

DOI:https://doi.org/10.1103/PhysRevLett.121.025001

© 2018 American Physical Society

Physics Subject Headings (PhySH)

Plasma Physics

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Vol. 121, Iss. 2 — 13 July 2018

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