Abstract

A numerical simulation allows a quantitative interpretation of spatially and time resolved X-ray diagnostics relative to highly ionized impurities in Tokamaks. These impurities are injected during the plateau of the discharge in such a small quantity that the electron density ne as well as the electron temperature Te can be considered to be constant. It is shown that, for argon at Te>or approximately=2 keV, a precision better than 10% can theoretically be obtained for the determination of the local diffusion time constant.

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