Study of EUV Spectra from Al X-pinch and Wire Array Implosions Produced on the 1 MA Zebra at UNR

Summary form only given. It is well known that implosions of X-pinches and wire arrays produce the powerful laboratory X-ray sources. X-ray spectroscopy is a very useful tool for diagnostics of X-and Z-pinch plasmas at stagnation while EUV spectroscopy seems to be an appropriate tool of diagnosing the plasma before and after the stagnation. Though X-ray spectra that characterize the stagnating plasmas are intensively used for X-and Z-pinch plasma diagnostics the EUV spectra are not vet studied in detail. In the present work a collection of EUV spectra from implosions of very different X-and Z-pinch loads on the 1 MA Zebra generator at UNR is presented for the first time. Specifically, the loads were Al X-pinches with 2 and 4 wires, cylindrical wire arrays (with and without a small portion of NaF coating), and planar wire arrays. The Al wires were from Al 5056 (95% Al and 5% Mg) and Al 1100 (99% Al) alloys. Non-LTE kinetic models of Al as well as Mg that were recently used to model X-ray K-shell Al and Mg spectra from the same loads were applied here to calibrate and identity the EUV spectra. Preliminary plasma parameters were computed. Similar and different features of the EUV spectra as well as corresponding plasma parameters from the above-mentioned loads were identified and analyzed. Modification of the existing models for the best fit of EUV spectra is discussed.