Neoclassical transport of a multispecies toroidal plasma in various collisionality regimes

Abstract

Continuously valid expressions for the neoclassical transport coefficients are analytically calculated for a multispecies plasma in the low to intermediate collision frequency regimes. The modification of the transport problem which results when a single heavy impurity ion species is in the collisional regime is presented. Consistent with the detailed balancing principle, a qualitative change in the magnitude of the long mean-free-path particle flux is shown to arise whenever there is more than a single collisionless species. A novel calculation of the bootstrap current permits the computation of a complete set of transport coefficients throughout the various collisionality regimes.