Abstract
Abstract Transport and relaxation phenomena far away from local thermodynamic equilibrium are studied in the very long mean-free-path regime. A multiple timescale analysis of plasma kinetic equations with an extended Landau collision operator is performed up to third order in a small Larmor radius expansion. Coulomb collisions are shown to cause transient processes such as anisotropy and energy relaxations in second order and cross-field transport in third order of the smallness parameter. Examples of anisotropic screw-pinch equilibria and of relaxation processes in a deuterium plasma with hot minority ions are presented. The radial particle flux subjected to the constraint of ambipolarity is calculated and shown to be substantially modified in size and direction by transient relaxation processes and anisotropy effects.
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