Abstract
Using the detailed configuration accounting with the term structures treated by the unresolved transition array model, we present a method to calculate the transmission spectra for high-power laser-produced plasmas. Due to our fully relativistic treatment, incorporated with the quantum defect theory to handle the huge number of transition arrays from many configurations with high principal quantum number, we can calculate the opacities for any middle- and high-Z plasmas with little computational effort. We can also conveniently identify the dominant configurations and the detailed features of transition arrays, which are very helpful for the diagnostics of plasma conditions. The accuracy of our theoretical method is tested by comparing the calculated transmission spectra of Nb and Fe plasmas with benchmark experimental data.
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