Yield enhancements in and spectral measurements of Al-Mg-KCl mixture arrays on the 7-MA Saturn generator

Summary form only given, as follows. Based on previous near-Z mixture calculations and experiments, a set of experiments have been performed on the 7-MA Saturn generator. Arrays of 30 wires on a 24 mm diameter were imploded in 55 ns. These arrays were composed of Al-Mg alloys (1% and 6%), Al-Mg coatings (19 or 36% Mg) and Al-Mg 1% alloy with 19 or 36% KCI coating. The 6% Mg alloys and the Mg-coatings gave more kilovolt yield than the 1% alloy as has been seen in other experiments. The addition of KCl did not enhance the yield significantly but this appears to be due to the presence of a significant aluminum free-bound continuum that already produces tens of kilojoules of X-rays. We will also report on the spectral analyses of temperature from seven different line ratios and the slope of the free-bound continuum plus density estimates based on Stark broadening of hydrogen-like aluminum lines and by matching the observed radiated powers.