Use of MERL for Stark-broadening Analysis on Opacity-on-NIF

The Opacity-on-NIF campaign^1,2 measures transmission to provide opacity data for Fe and other elements to help address the discrepancy between theory and Opacity-on-Z data³. The Opacity-on-NIF experiments have worked to improve reproducibility and correct for backgrounds, and have reached the point where comparison to Stark broadened line shapes⁴ (using MERL) can become reliable for extracting areal density. This can be compared to areal density from sample expansion measurements^5,6,7. While an initial analysis has been previously shown, comparison to data at different stages of corrections will illustrate improved accuracy.

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   Y. P. Opachich, R. F. Heeter, H. M. Johns, submitted to RSI for HTPD (2022)