Equation of state and sound velocity of a helium plasma by Thomas-Fermi-Dirac molecular dynamics

Journal Article · Fri Sep 15 00:00:00 EDT 2006 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.2345181· OSTI ID:20860254

Danel, J -F; Kazandjian, L; Zerah, G ^[1]

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1. Commissariat a l'Energie Atomique, Centre CEA/DIF, B.P. 12, 91680 Bruyeres-le-Chatel (France)

A method combining classical molecular dynamics applied to nuclei and Thomas-Fermi-Dirac theory applied to electrons is used to calculate the thermodynamic properties of an helium plasma. Two densities, corresponding to average electronic radii of 1 and 2 Bohr radii, and several temperatures, corresponding to coupling parameters between 0.1 and 100, are considered. Both pressure and internal energy (with a correction for the regularization of the potential) are obtained. Some derivative quantities and sound velocity are computed by numerical differentiation with a careful evaluation of the truncation error and of the statistical error. Pressure and sound velocity are obtained with relative standard deviations, respectively, of less than 0.3% and 2.5%.

• OSTI ID: 20860254
• Journal Information: Physics of Plasmas, Vol. 13, Issue 9; Other Information: DOI: 10.1063/1.2345181; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CORRECTIONS
COUPLING
ELECTRON TEMPERATURE
ELECTRONS
EQUATIONS OF STATE
ERRORS
HELIUM
ION TEMPERATURE
MOLECULAR DYNAMICS METHOD
PLASMA
PLASMA DENSITY
PLASMA SIMULATION
POTENTIALS
SOUND WAVES
THERMODYNAMIC PROPERTIES
THERMODYNAMICS
THOMAS-FERMI MODEL
VELOCITY