Dielectronic satellite spectrum of heliumlike argon: A contribution to the physics of highly charged ions and plasma impurity transport

Wavelengths and atomic parameters for the satellite spectrum of the 1$s^2$-1s2p parent lines of ${\mathrm{Ar}}^{16+}$ have been calculated using a multiconfiguration intermediate-coupling scheme with a statistical Thomas-Fermi potential. These data, together with radial charge-state distributions given by an impurity transport code, are used to calculate theoretical spectra. The comparison with experimental x-ray spectra from the TFR tokamak plasma shows good agreement between calculated and observed wavelengths. The fitting of relative line intensities in the synthetic spectra to observed values improves the understanding of plasma impurity transport.