Equation of state of classical Coulomb plasma mixtures

Details Equation of state of classical Coulomb plasma mixtures Equation of state of classical Coulomb plasma mixtures

2008-12-23

arxiv.org/abs/0812.4344v2

Phys. Rev. E 79, 016411 (2009)

Physics

Plasma Physics

6 pages, 7 figures; Phys. Rev. E. In v.2 after proofreading, minor typos are fixed

Scientific paper

10.1103/PhysRevE.79.016411

We develop analytic approximations of thermodynamic functions of fully ionized nonideal electron-ion plasma mixtures. In the regime of strong Coulomb coupling, we use our previously developed analytic approximations for the free energy of one-component plasmas with rigid and polarizable electron background and apply the linear mixing rule (LMR). Other thermodynamic functions are obtained through analytic derivation of this free energy. In order to obtain an analytic approximation for the intermediate coupling and transition to the Debye-Hueckel limit, we perform hypernetted-chain calculations of the free energy, internal energy, and pressure for mixtures of different ion species and introduce a correction to the LMR, which allows a smooth transition from strong to weak Coulomb coupling in agreement with the numerical results.

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