Neoclassical bootstrap current and transport in optimized stellarator configurations

Abstract

The neoclassical bootstrap current properties of optimized stellarators are analyzed in the relevant mean‐free‐path regimes and compared with the neoclassical transport properties. Two methods—global Monte Carlo simulation [Phys. Fluids 31, 2984 (1988)], and local analysis with the drift kinetic equation solver code [Phys. Fluids B 1, 563 (1989)]—are employed and good agreement is obtained. Full consistency with the elimination of the bootstrap current and favorable neoclassical transport are found.