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Ab initio calculations of the equation of state of hydrogen in a regime relevant for inertial fusion applications

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.1016/j.hedp.2011.09.002
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FormatText, Article
Subjectfusion; hydrogen; equation of state
Abstract
We describe ab initio electronic structure calculations (density functional theory molecular dynamics and coupled electron-ion quantum Monte Carlo) of the equation of state (EOS) of hydrogen in a pressure–temperature regime relevant for simulating the initial phase of an inertial confinement fusion capsule implosion. We find the computed EOS to be quite close to that of the most recent SESAME table (constructed by G. Kerley, 2003). A simple density-dependent but temperature-independent correction brings the 2003-Kerley EOS into excellent agreement with ours in the chosen region of the hydrogen phase diagram. Simulations of fusion ignition experiments on the National Ignition Facility (NIF) with this modified 2003-Kerley table are shown to produce results nearly indistinguishable from those of the 2003-Kerley EOS, which was used to design the capsule. In this sense, we do not expect that further improvements to the hydrogen EOS in this particular regime will impact the capsule design.
Publication date
PublisherElsevier
In
  • High Energy Density Physics 8, no. 1: 5–12.
LanguageEnglish
Peer reviewedYes
NRC publication
This is a non-NRC publication

"Non-NRC publications" are publications authored by NRC employees prior to their employment by NRC.

NPARC number23003165
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Record identifier5d4b5007-07aa-4c55-8fa7-1dddeafcfb89
Record created2018-05-03
Record modified2020-04-21
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