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Title: A review on ab initio studies of static, transport, and optical properties of polystyrene under extreme conditions for inertial confinement fusion applications

Journal Article · · Physics of Plasmas
DOI:https://doi.org/10.1063/1.5017970· OSTI ID:1434644

Polystyrene (CH), commonly known as “plastic,” has been one of the widely used ablator materials for capsule designs in inertial confinement fusion (ICF). Knowing its precise properties under high-energy-density conditions is crucial to understanding and designing ICF implosions through radiation–hydrodynamic simulations. For this purpose, systematic ab initio studies on the static, transport, and optical properties of CH, in a wide range of density and temperature conditions (ρ= 0.1 to 100 g/cm3 and T = 103 to 4 × 106K), have been conducted using quantum molecular dynamics (QMD) simulations based on the density functional theory. We have built several wide-ranging, self-consistent material-properties tables for CH, such as the first-principles equation of state (FPEOS), the QMD-based thermal conductivity (ΚQMD) and ionization, and the first-principles opacity table (FPOT). This paper is devoted to providing a review on (1) what results were obtained from these systematic ab initio studies; (2) how these self-consistent results were compared with both traditional plasma-physics models and available experiments; and (3) how these first-principles–based properties of polystyrene affect the predictions of ICF target performance, through both 1-D and 2-D radiation–hydrodynamic simulations. In the warm dense regime, our ab initio results, which can significantly differ from predictions of traditional plasma-physics models, compared favorably with experiments. When incorporated into hydrocodes for ICF simulations, these first-principles material properties of CH have produced significant differences over traditional models in predicting 1-D/2-D target performance of ICF implosions on OMEGA and direct-drive–ignition designs for the National Ignition Facility. Lastly, we will discuss the implications of these studies on the current small-margin ICF target designs using a CH ablator.

Research Organization:
Univ. of Rochester, NY (United States). Lab. for Laser Energetics; Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0001944; AC52-06NA25396
OSTI ID:
1434644
Alternate ID(s):
OSTI ID: 1440479
Report Number(s):
2017-107, 1395; LA-UR-17-30935; 2017-107, 1395, 2353
Journal Information:
Physics of Plasmas, Vol. 25, Issue 5; Conference: 59th Annual Meeting of the APS Division of Plasma Physics, Milwaukee, WI (United States), 23-27 Oct 2017; ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 21 works
Citation information provided by
Web of Science

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Cited By (7)

Development and modeling of a polar-direct-drive exploding pusher platform at the National Ignition Facility journal July 2018
Simulated refraction-enhanced X-ray radiography of laser-driven shocks journal March 2019
The National Direct-Drive Inertial Confinement Fusion Program journal December 2018
Testing thermal conductivity models with equilibrium molecular dynamics simulations of the one-component plasma journal October 2019
Radiative and atomic properties of C and CH plasmas in the warm-dense-matter regime journal October 2018
Radiative and atomic properties of C and CH plasmas in the warm-dense matter regime text January 2018
Simulated Refraction-Enhanced X-Ray Radiography of Laser-Driven Shocks text January 2019

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