Integrated analysis and consistency measurement of bremsstrahlung and charge exchange spectroscopy data for the determination of the ion effective charge.

In the context of Bayesian probability theory, we discuss a model for estimating the plasma ion effective charge Z(eff), integrating data from both bremsstrahlung spectroscopy and individual impurity concentrations obtained via charge exchange spectroscopy (CXS). The validity of the model, taking into account statistical as well as systematic uncertainties, is shown via the deviance information criterion. The consistency of the continuum and CXS data regarding Z(eff) is improved, as measured by the symmetrized Kullback-Leibler divergence and the geodesic distance between the respective Z(eff) marginal posterior densities.