Simultaneous time-gated measurements of K- and L-shell radiation from brass wire array implosions on Zebra
POSTER
Abstract
New experiments have simultaneously measured both the copper and zinc K- and L-shell radiation with two time-gated spectrometers on the 1 MA Zebra generator at the University of Nevada, Reno. This work extends the previous brass wire implosions which only used one time-gated spectrometer [Ouart \textit{et al.}, IEEE Trans. Plasma Sci. \textbf{38}, 631 (2010) and Ouart \textit{et al.}, HEDP \textbf{8}, 247 (2012)]. The diagnostic suite also includes time-integrated spatially resolved spectrometers, time-integrated and time-gated pinhole imaging, various x-ray diodes, Ni bolometers, a Faraday cup, and laser shadowgraphy. The L-shell radiation comes from ionization stages around the Ne-like charge state that is largely populated by a thermal electron energy distribution function, while the K-shell radiation is subsequently produced by electron beams removing an inner-shell electron. A multi-zone non-LTE copper and zinc pinch model will be used to model the radiation from experiments. Diagnostic analysis will be presented using contours of line ratios and powers.
*Work supported by DOE/NNSA. This research was performed while N. Ouart held a National Research Council Research Associateship Award at NRL.