Bases for Transport Analysis of Troidal Plasmas 4.Particle Transport Analyses

Abstract

Methods for particle transport analysis in toroidal plasmas are summarized on the basis of particle balance equation. The particle transport model, where the particle flux is expressed as a sum of a diffusion term and a convection term, is introduced. Estimation of the charged particle source due to the ionization of neutral particles is briefly explained for the quantitative analysis of the particle balance based on measurements of neutral particle density and a Monte-Carlo simulation of neutral particle behavior. Several examples for the evaluation of the particle diffusivity and the convection velocity are presented.