Radial Transport in ELMO Bumpy Torus with Constant Edge Neutral Flux

Abstract

One-dimensional radial transport equations for the ELMO bumpy torus are solved numerically assuming a constant flux of cold neutrals at the plasma edge. With this boundary condition, thermal stability of numerical solutions is achieved, for the first time, in the collisionless electron regime using a fully classical transport model. Results show a parametric dependence on edge neutral pressure in the collisionless regime which is similar to that observed in experiments.