A methodology to constrain continuum lowering models at high energy densities

Continuum lowering models describe the response of an ion to the high-density environments typical of astrophysical objects and fusion plasmas. Recent measurements have challenged these traditional models, signaling the need for modern descriptions of dense plasmas. Future experiments must discriminate between competing models to guide the development of theory. In this talk, a methodology is developed to constrain continuum lowering models. Synthetic Cr K-shell spectra are generated and analyzed with a parametrized solution to the equation of radiative transfer. Different continuum lowering models are used to analyze the synthetic spectra. The geometric and thermodynamic parameters most consistent with the synthetic spectra are used to define the required accuracy of experimental measurements. This quantitative methodology is guiding the design of thick-shell implosion experiments hosting a Cr layer to study atomic physics at high energy densities.