First-principles equation-of-state table of beryllium based on density-functional theory calculations
- Univ. of Rochester, NY (United States). Lab. for Laser Energetics. Dept. of Mechanical Engineering
- Univ. of Rochester, NY (United States). Lab. for Laser Energetics
Beryllium has been considered a superior ablator material for inertial confinement fusion (ICF) target designs. An accurate equation-of-state (EOS) of beryllium under extreme conditions is essential for reliable ICF designs. Based on density-functional theory (DFT) calculations, we have established a wide-range beryllium EOS table of density ρ = 0.001 to 500 g/cm3 and temperature T = 2000 to 108 K. Our first-principle equation-of-state (FPEOS) table is in better agreement with the widely used SESAME EOS table (SESAME 2023) than the average-atom INFERNO and Purgatorio models. For the principal Hugoniot, our FPEOS prediction shows ~10% stiffer than the last two models in the maximum compression. Although the existing experimental data (only up to 17 Mbar) cannot distinguish these EOS models, we anticipate that high-pressure experiments at the maximum compression region should differentiate our FPEOS from INFERNO and Purgatorio models. Comparisons between FPEOS and SESAME EOS for off-Hugoniot conditions show that the differences in the pressure and internal energy are within ~20%. By implementing the FPEOS table into the 1-D radiation–hydrodynamic code LILAC, we studied in this paper the EOS effects on beryllium-shell–target implosions. Finally, the FPEOS simulation predicts higher neutron yield (~15%) compared to the simulation using the SESAME 2023 EOS table.
- Research Organization:
- Univ. of Rochester, NY (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA); Univ. of Rochester (United States); New York State Energy Research and Development Authority (United States)
- Grant/Contract Number:
- NA0001944
- OSTI ID:
- 1361691
- Journal Information:
- Physics of Plasmas, Vol. 24, Issue 6; ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
A review on ab initio studies of static, transport, and optical properties of polystyrene under extreme conditions for inertial confinement fusion applications
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journal | May 2018 |
Beryllium capsule implosions at a case-to-capsule ratio of 3.7 on the National Ignition Facility
|
journal | October 2018 |
Mitigating laser-imprint effects in direct-drive inertial confinement fusion implosions with an above-critical-density foam layer
|
journal | August 2018 |
Atom-in-jellium equations of state in the high energy density regime | text | January 2019 |
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