Model equation-of-state for any material in conditions relevant to ICF and to stellar interiors

Abstract

A simple model Equation-of-State (EOS) for matter in conditions of interest to Inertial Confinement Fusion (ICF) and to Stellar Interiors is developed. It yields pressures and specific energies in good agreement with accurate EOS tabulations, for matter in the density range 10−6 < ρ < 104 g cm−3 and in the temperature range 0 ≤ T < 100 KeV, with the only exception being the liquid and gaseous phases of the undissociated molecular substances.This EOS can be used for any element or mixture, requiring, as input data, only the chemical composition (A, Z, and abundancy of each element of the mixture) and three macroscopic constants of the material.

Self-consistent analysis of the hot spot dynamics for inertial confinement fusion capsules

“…For 2D single-mode calculations, we have used the hydrodynamics DUED code, [8][9][10] which includes radiative transfer, flux-limited electron conduction, atomic physics, realmatter equation of state, 22 and diffusion of fusion alphaparticles. The initial conditions for the 2D calculations were extracted from 1D data given by FCI2 simulations.…”

A method for the automatic rezoning of 2-D Lagrangian codes for ICF implosions

“…While prior to the introduction of the rezoning our studies were limited to the processes occurring before shell collapse (Atzeni 1990a), for not too large laser perturbations we can now follow the entire target story, including the phases of collapse and reflection, maintaining interface discrimination, as is shown in figure 5 (after Atzeni & Guerrieri 1989).…”

“…(a) Mesh before rezoning; (b) mesh after rezoning. For the meaning of the arrows and the thicker curves, see the text.zone is computed from the zone density and the temperature by using the equation of state already contained, in tabular form, in the code(Atzeni, Caruso & Pais 1986). With suitable interpolations we get, in each zone, i?^,/) = ^/}(P(*,/)> 7/3(*,o)> w ' t n obvious meanings of the symbols.…”

“…'/',/'Collapse and reflection of a very thin shell imploded by a centrally focused, nonuniform laser pulse [with mode number 1 = 4; seeAtzeni & Guerrieri (1989) for details]. Velocity vectors on the mesh points are shown at three time levels.…”

Magnetic field generation and diffusion by a laser-produced blast wave propagating in non-homogenous plasma

“…Tabulated opacities are provided by an upgraded version of the SNOP code [33], which computes steady-state-non-localthermal-equilibrium opacities using an average-atom model. Material properties are described by a tabulated equation of state [34] accounting for several non-ideal effects, including partial ionization (of particular relevance for the present study).…”