Community Research and Development Information Service - CORDIS

Abstract

The moment method is used to treat the trace impurity transport problem in tokamaks. This solves the kinetic equation and the corresponding boundary conditions by introducing a truncation when expanding the distribution function into basis functions with expansion coefficients subject to moment (transport) equations. This method has special merit when dealing with collision dominated transport phenomena since the convergence of the series expansion improves with increasing collisionality. The moment method is used to describe the classical and anomalous impurity ion transport in a high density, low temperature edge plasma in contact with a limiter. A closed system of equations is derived for the calculation of impurity ion density and line radiation profiles, assuming Corona equilibrium among the excitation levels of the various ionisation states, provided the hydrogen plasma parameters are known.

Additional information

Authors: CLAASSEN H A, Institut für Plasmaphysik, Kernforschungsanlage Jülich GmbH, Jülich (DE);GERHAUSER H, Institut für Plasmaphysik, Kernforschungsanlage Jülich GmbH, Jülich (DE);REITER D, Institut für Plasmaphysik, Kernforschungsanlage Jülich GmbH, Jülich (DE)
Bibliographic Reference: Article: Contributions to Plasma Physics, Vol. 30 (1990) No. 1, pp. 83-88
Record Number: 199011077 / Last updated on: 1994-12-01
Category: PUBLICATION
Original language: en
Available languages: en