Modelling of turbulent impurity transport in fusion edge plasmas using measured and calculated ionization cross sections

TL;DR

This paper models turbulent impurity transport in fusion edge plasmas using gyrofluid simulations that incorporate measured and calculated ionization cross sections, revealing impurity dynamics influenced by filamentary structures.

Contribution

It introduces a gyrofluid modeling approach that dynamically includes ionization cross sections to simulate impurity transport in tokamak edge plasmas.

Findings

Impurities are passively advected by turbulent structures.

Filamentary blobs significantly influence impurity transport.

Ionization data impacts impurity source modeling.

Abstract

Turbulent transport of trace impurities impurities in the edge and scrape-off-layer of tokamak fusion plasmas is modelled by three dimensional electromagnetic gyrofluid computations including evolution of plasma profile gradients. The source function of impurity ions is dynamically computed from pre-determined measured and calculated electron impact ionization cross section data. The simulations describe the generation and further passive turbulent E-cross-B advection of the impurities by intermittent fluctuations and coherent filamentary structures (blobs) across the scrape-off-layer.