ION-TRANSPORT IN A PARTIALLY-IONIZED IMPURE EDGE PLASMA

The kinetic theory of transport in an impure, partially ionized, edge plasma is developed. It is found that the thermal force between bulk i ons and impurities is enhanced by the presence of neutral atoms, but t he dynamical friction is not affected by the neutrals. When the neutra l viscosity is large, an additional force on the impurities also arise s. This force is parallel to the magnetic field, and is proportional t o the shear of the parallel plasma velocity and the perpendicular ion density and temperature gradients.