Analysis of EUV data from implosions of aluminum wire arrays on 1 MA university-scale generators

Summary form only given. EUV spectroscopy is a feasible tool for diagnosing of Z-pinch plasma before and after stagnation in complement to X-ray spectroscopy, which is conventionally used in studying of the stagnating hot dense plasmas. A collection of aluminum EUV spectra from implosions of traditional cylindrical wire arrays and new planar wire arrays (PWA) on the 1 MA Zebra generator at UNR are being analyzed in this work. Al PWA loads were uniform and combined with Mo wires. Also, the EUV spectra and images from experiments with combined aluminum and stainless steel alloy 304, nested wire arrays from the IMA COBRA generator at Cornell University are presented. The loads consisted of 8 or 16 wires of different materials in outer and inner arrays: stainless steel or aluminum. Non-LTE Al model was used to identify EUV spectra and to estimate plasma parameters. The special emphasis was made on study of dependence of Al EUV spectra on the type and composition of the load. WADM and radiation MHD simulations have been performed to model the load implosion, analyze the EUV images and calculate the bulk temperature of the precursor plasma column. In addition, we study the aluminum EUV spectra, recorded at the laser plasma facility "Sparky" at UNR. These spectra help to benchmark our spectroscopic models and identify the Z-pinch spectra.