[statistical physics -- AG
		Prof. Dr. Ronald Redmer --]

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University of Rostock Institute of Physics / Statistical Physics Group

COMPTRA04 - a program package to calculate composition and transport coefficients in dense plasmas

COMPTRA04 is a Fortran 90 program package developed for the calculation of composition and transport coefficients within the partially ionized plasma model.

For details and a manual, see:
S. Kuhlbrodt et. al., Contributions to Plasma Physics, Volume 45, Issue 2 , Pages 73 - 88 (2005)

For downloading the package use the following link:
comptra04.tar.gz   (version 040726, 350kB)


Transport Coefficients and Composition of Dense Plasmas

This site contains data files for the composition of various metal and noble gas plasmas as well as for the transport coefficients electrical conductivity (sigma), thermal conductivity (lambda), thermopower (kappa), and Lorentz number (L) for given densities and temperatures. Basis for the calculation of the composition is the partially ionized plasma (PIP) model: Free electrons, various ion species, and neutral atoms are treated in a chemical picture. For the calculation of the transport coefficients, the linear response theory (LRT) in the formulation of Zubarev was used which is valid for arbitrary degeneracy.

For details of these models and the respective calculations, see:

S. Kuhlbrodt, PhD thesis, Universität Rostock 2003 . (in german)

S. Kuhlbrodt et. al., Contributions to Plasma Physics, Volume 45, Issue 1 , Pages 61 - 69 (2005)

Here, only the most important approximations are mentioned:

Calculation of composition:
  • Padé approximations of Ebeling et al. for the contributions of charged particles to the free energy
  • 2nd virial coefficient for the polarization contribution of charged-neutral interactions to the free energy
  • neglect of contributions to the free energy due to particle volumina (excluded volume)
Calculation of the transport coefficients:
  • three-moment approximation
  • transport cross sections in T-matrix approximation for e-i and e-e scattering
  • transport cross sections in Born approximation for e-atom scattering
  • neglect of ion-ion structure factor effects
The files given below are named due to there content. For example, files fe10-30K_* contain data for iron (fe) between 10000 K and 30000 K. The prefix *_comp stands for a composition file, *_trans are files that include data for the transport coefficients, *_sesa contains electrical conductivity, thermal conductivity, and thermopower in the usual SESAME format for the same temperatures and densities as the *_trans files. (see more information about formats )


Metal Plasmas

beryllium: be10-30K_comp be10-30K_trans be10-30K_sesa
aluminium: al10-30K_comp al10-30K_trans al10-30K_sesa
iron: fe10-30K_comp fe10-30K_trans fe10-30K_sesa
nickel: ni10-30K_comp ni10-30K_trans ni10-30K_sesa
copper: cu10-30K_comp cu10-30K_trans cu10-30K_sesa
zinc: zn8K_comp zn8K_trans zn8K_sesa
  zn10-30K_comp zn10-30K_trans zn10-30K_sesa
tungsten: w10-30K_comp w10-30K_trans w10-30K_sesa

Noble Gas Plasmas

helium: he15-25K_comp he15-25K_trans he15-25K_sesa
neon: ne15-25K_comp ne15-25K_trans ne15-25K_sesa
argon: ar10-25K_comp ar10-25K_trans ar10-25K_sesa
krypton: kr10-20K_comp kr10-20K_trans kr10-20K_sesa
xenon: xe10-30K_comp xe10-30K_trans xe10-30K_sesa


Last modified: Wed Apr 6 10:35:35 MEST 2005