Abstract

The complexity of the equations describing the transport phenomena in Tokamaks requires the use of numerical codes for simulation. These codes assume that the plasma is a multifluid medium. They involve equations for the evolution of electrons, light ions and current density, equations for heavy ions (impurities) and elaborate models for the evolution of the neutrals of light atoms. These codes allow testing of the existing theories and deduction of empirical rules and coefficients. After we have presented in more detail the Fontenay-aux-Roses code, we give examples of a few applications of this code.

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