A database for equations of state and resistivities measurements in the warm dense matter regime

Abstract

The aim of this paper is to provide experimental data on various expanded elements in the warm dense matter regime. The experiments were done on the experimental facility “enceinte à plasma isochore” and are evaluated through a thorough comparison with ab initio calculations, average-atom codes, and chemical models. This comparison allows for the evaluation of the experimental temperatures that are not accessible to the measurements and permits the building of useful data tables gathering energy, pressure, conductivity, and temperatures. We summarize experiments performed on aluminum (0.1 and 0.3 g/cm3), nickel (0.2 g/cm3), titanium (0.1 g/cm3), copper (0.3 and 0.5 g/cm3), silver (0.43 g/cm3), gold (0.5 g/cm3), boron (0.094 g/cm3), and silicon (0.21 g/cm3) for temperatures ranging from 0.5 eV to 3-4 eV.

The Thermophysical Properties of Iron Plasma

“…In particular the shock wave compression was applied to obtain the thermodynamical values under study along Hugoniot adiabat for Cu, Ni and Fe [3][4][5]. Another one experimental approach is based on the explosions of the metallic conductors (foils or wires) due to the applied high currents [6][7][8][9][10][11]. Besides the thermodynamical values the electrical conductivity has been measured by this technique.…”

“…Each approach supposes some model of a substance (plasma) itself. The most rigorous and advanced approaches, possibly, are so-called ab initio methods [11,13,14]. They treat a substance as two-component medium, consisting of classical nuclei and degenerate electrons.…”

“…In this case it is enough to know the atomic number of an element, which is equal to the nucleus charge (for Iron it is 26). The wide-used implementation of these methods is, for instance, Quantum Molecular Dynamics (QMD) [11]. In the case of Average Atom Models (AAM) the plasma is divided into a mixture of non-overlapping neutral spherical cell of Wigner-Seitz radius [15][16][17].…”

Free-Electron X-Ray Laser Measurements of Collisional-Damped Plasmons in Isochorically Heated Warm Dense Matter

“…Previous measurements of the electrical conductivity especially the static conductivity were performed on compressed [11][12][13][14] and uncompressed matter [15][16][17][18][19][20][21][22][23]. In these studies, the lack of accurate plasma characterization techniques in the transient WDM regime have made comparisons and critical experimental tests of conductivity calculations challenging.…”

Thermoelectric transport properties of molybdenum fromabinitiosimulations

“…It has been successfully applied for various materials, mostly with focus on the electrical conductivity. 23,[36][37][38][39][40][41] In this paper, in addition to conductivity, we also calculate the thermal transport properties, thus making full use of the theoretical approach. The Vienna ab initio simulation package (VASP) 5.3.2, [42][43][44][45][46] which is a plane-wave pseudopotential code, is used for both the MD simulations and transport calculations.…”