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1-dimensional (1D) and time-dependent multi-fluid plasma models are derived from multi-fluid magnetohydrodynamic (MHD) equations. Including neutral particles and their ionization stages as fluids increases the number of equations to be solved and the indeterminacy of the results considerably. For this reason, especially for the case of high-Z materials, the impurities are described by distinct approaches without restricting the impurity densities to be small compared with the hydrogen plasma density. A three-fluid description was derived and used to analyze wave front solution of the self-consistent system of equations obtained. This system is reduced to a two-fluid description assuming the flow velocities of the electrons and ions to be equal. This model can be reduced further to a currentless, modified one-fluid approach if the impurity density in dependence on the model functions is known.

Additional information

Authors: BACHMANN P, Max-Planck-Institut für Plasmaphysik, Berlin (DE);SÜNDER D, Max-Planck-Institut für Plasmaphysik, Berlin (DE);SUNDER D, Max-Planck-Institut fur Plasmaphysik, Berlin (DE)
Bibliographic Reference: Report: IPP 8/13 EN (1998) 42pp., FS
Availability: Available from the Max-Planck-Institut für Plasmaphysik, 85748 Garching bei München (DE)
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