Line Broadening Analysis of Argon X-Ray Emission from Z-Driven Implosions Cores

We disucss the line broadening analysis of argon‐doped deuterium‐filled implosion cores driven by a dynamic hohlraum z‐pinch. The observed line spectra include emissions from the Lyα, Lyβ, Lyγ, Heα, Heβ, Heγ and Heδ lines in H‐ and He‐like argon ions, respectively. The data recorded using a crystal spectrometer with space‐resolving slits and coupled to a framing camera yields time‐ and spatially‐resolved argon line spectra in the implosion core. The analysis accounts for opacity and Stark line broadening to determine electron density, Ne, and areal‐density, NΔR, values for the ground state populations of H‐ and He‐like argon ions. In this connection, a set of Stark‐broadened line shapes was computed considering the effect of differing ion and electron temperatures, which impacts the calculation of the ion microfield distribution function, the Doppler broadening, and the ion dynamic’s effect. Analysis results will be discussed emphasizing the relevance of using these detailed Stark‐broadened line shapes.