Effect of Magnetized Collisions on Classical and Neoclassical Transport

摘要

In current tokamak experiments the electron Larmor radius rho/sub e/ is of the order or smaller than the Debye screening length lambda/sub D/. Therefore the Larmor trajectories should lead to significant changes of the collision contribution to the transport coefficients. These changes can be understood as the balance between two opposite effects, with on one hand an enhancement due to increased interaction times (confinement effect) and on the other hand an inhibition of transverse exchanges since the magnetic momentum is constant for magnetized collisions (the interaction scale is larger than the Larmor radius. As a consequence a precise and detailed study is necessary to obtain the exact magnetic dependence induced by the Larmor trajectories effects. (ERA citation 13:038775)