Fusion related experiments with medium-Z multiply charged ions

An overview is given on spectroscopic investigations of keV/amu collisions between medium-Z multiply charged ions and Li and He targets, which have been performed at the KVI during the last years. Line emission cross sections relevant for fusion plasma diagnostics have been experimentally determined and are compared with theoretical predictions based on CTMC, Close-Coupling and Landau-Zener calculations. It is found that for Li-targets the large cross sections for visible light emission are practically independent of the projectiles' core structure and that these cross sections are reliably predicted by close coupling and CTMC calculations. For He targets very low cross sections for visible light emission are found, related theoretical data are not yet available; here also the dominant rection channels - giving rise to VUV light emission - have been investigated, and it is found that there is still unsatisfactory agreement between experimental and theoretical data