title: Dissociation along the principal Hugoniot of the Laser Mégajoule ablator material.
abstract: Glow discharge polymer hydrocarbon (GDP-CH) is used as the ablator material in inertial confinement fusion (ICF) capsules for the Laser Mégajoule and National Ignition Facility. Due to its fabrication process, GDP-CH chemical composition and structure differ from commercially available plastics and detailed knowledge of its properties in the warm dense matter regime is needed to achieve accurate design of ICF capsules. First-principles ab initio simulations of the GDP-CH principal Hugoniot up to 8 Mbar were performed using the quantum molecular dynamics (QMD) code abinit and showed that atomic bond dissociation has an effect on the compressibility. Results from these simulations are used to parametrize a quantum semiempirical model in order to generate a tabulated equation of state that includes dissociation. Hugoniot measurements obtained from an experiment conducted at the LULI2000 laser facility confirm QMD simulations as well as EOS modeling. We conclude by showing the EOS model influence on shock timing in a hydrodynamic simulation.
authors.affiliation: CEA, DAM, DIF, Bruyères-le-Châtel, F-91297 Arpajon, France.|Laboratoire pour l'Utilisation des Lasers Intenses (LULI) - CEA, CNRS, Ecole Polytechnique : Université Paris-Saclay, UPMC Université Paris 06 : Sorbonne Universités - F-91128 Palaiseau, France.
authors.forename: P
authors.initials: P
authors.lastname: Colin-Lalu
authors.affiliation: CEA, DAM, DIF, Bruyères-le-Châtel, F-91297 Arpajon, France.
authors.forename: V
authors.initials: V
authors.lastname: Recoules
authors.affiliation: CEA, DAM, DIF, Bruyères-le-Châtel, F-91297 Arpajon, France.
authors.forename: G
authors.initials: G
authors.lastname: Salin
authors.affiliation: CEA, DAM, DIF, Bruyères-le-Châtel, F-91297 Arpajon, France.
authors.forename: T
authors.initials: T
authors.lastname: Plisson
authors.affiliation: Laboratoire pour l'Utilisation des Lasers Intenses (LULI) - CEA, CNRS, Ecole Polytechnique : Université Paris-Saclay, UPMC Université Paris 06 : Sorbonne Universités - F-91128 Palaiseau, France.
authors.forename: E
authors.initials: E
authors.lastname: Brambrink
authors.affiliation: Laboratoire pour l'Utilisation des Lasers Intenses (LULI) - CEA, CNRS, Ecole Polytechnique : Université Paris-Saclay, UPMC Université Paris 06 : Sorbonne Universités - F-91128 Palaiseau, France.
authors.forename: T
authors.initials: T
authors.lastname: Vinci
authors.affiliation: Laboratoire pour l'Utilisation des Lasers Intenses (LULI) - CEA, CNRS, Ecole Polytechnique : Université Paris-Saclay, UPMC Université Paris 06 : Sorbonne Universités - F-91128 Palaiseau, France.
authors.forename: R
authors.initials: R
authors.lastname: Bolis
authors.affiliation: CEA, DAM, DIF, Bruyères-le-Châtel, F-91297 Arpajon, France.
authors.forename: G
authors.initials: G
authors.lastname: Huser