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Title: Impact of first-principles properties of deuterium–tritium on inertial confinement fusion target designs

Journal Article · · Physics of Plasmas
DOI:https://doi.org/10.1063/1.4917477· OSTI ID:1178573
 [1];  [1];  [1];  [1];  [1];  [2];  [2];  [3]
  1. Univ. of Rochester, NY (United States). Lab. for Laser Energetics
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Theoretical Div.
  3. Univ. of California, Berkeley, CA (United States). Department of Earth and Planetary Science and Department of Astronomy

A comprehensive knowledge of the properties of high-energy-density plasmas is crucial to understanding and designing low-adiabat, inertial confinement fusion (ICF) implosions through hydrodynamic simulations. Warm-dense-matter (WDM) conditions are routinely accessed by low-adiabat ICF implosions, in which strong coupling and electron degeneracy often play an important role in determining the properties of warm dense plasmas. The WDM properties of deuterium–tritium (DT) mixtures and ablator materials, such as the equation of state (EOS), thermal conductivity, opacity, and stopping power, were usually estimated by models in hydrocodes used for ICF simulations. In these models, many-body and quantum effects were only approximately taken into account in the WMD regime. Moreover, the self-consistency among these models was often missing. To examine the accuracy of these models, we have systematically calculated the static, transport, and optical properties of warm dense DT plasmas, using first-principles (FP) methods over a wide range of densities and temperatures that cover the ICF “path” to ignition. These FP methods include the pathintegral Monte Carlo (PIMC) and quantum-molecular dynamics (QMD) simulations, which treat electrons with many-body quantum theory. The first-principles equation-of-state (FPEOS) table, thermal conductivities (KQMD), and first principles opacity table (FPOT) of DT have been self-consistently derived from the combined PIMC and QMD calculations. They have been compared with the typical models, and their effects to ICF simulations have been separately examined in previous publications. In this paper, we focus on their combined effects to ICF implosions through hydro-simulations using these FP-based properties of DT in comparison with the usual model simulations. We found that the predictions of ICF neutron yield could change by up to a factor of ~2.5; the lower the adiabat of DT capsules, the more variations in hydro-simulations. The FP-based properties of DT are essential for designing ICF ignition targets. We also discuss future work on first-principles studies of ICF ablator materials.

Research Organization:
Univ. of Rochester, NY (United States). Lab. for Laser Energetics; Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
NA0001944; NA000194; AC52-06NA25396
OSTI ID:
1178573
Alternate ID(s):
OSTI ID: 1240397
Report Number(s):
LA-UR-14-28895; PHPAEN; 2014-116; 1220
Journal Information:
Physics of Plasmas, Vol. 22, Issue 5; ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 34 works
Citation information provided by
Web of Science

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Calculation of Particle Emissions and Fusion Cross Sections After 8 B( t ,*), 9 B( t ,*), and 10 B( t ,*) Reactions by Monte Carlo Simulations journal February 2020
Measurement of multiple physical parameters of dense gaseous hydrogen-deuterium mixture under double-shock compression: Evaluating theoretical models from multiple views journal December 2019
A review on ab initio studies of static, transport, and optical properties of polystyrene under extreme conditions for inertial confinement fusion applications journal May 2018
Exchange-correlation thermal effects in shocked deuterium: Softening the principal Hugoniot and thermophysical properties journal June 2019
Fast nonadiabatic dynamics of many-body quantum systems journal November 2019
Quantum molecular dynamics study on the proton exchange, ionic structures, and transport properties of warm dense hydrogen-deuterium mixtures journal June 2018
Measurement of the sound speed in dense fluid deuterium along the cryogenic liquid Hugoniot journal January 2019
Theoretical and experimental investigation of the equation of state of boron plasmas journal August 2018
Kinetic physics in ICF: present understanding and future directions journal April 2018