Mix Effects in Opacity-on-NIF Samples

Opacity-on-NIF uses layered targets to measure the x-ray transmission opacity on National Ignition Facility (NIF). Mix between different layers can alter target's opacity by increasing the width of the foil thus decreasing its density. Several mix models of the target foil and tamping material are considered alongside an unmixed and a homogeneously mixed case. The ability of the target to reach sufficient temperatures and densities and remain uniform and in local thermal equilibrium is evaluated. The effects of mix on the transmission opacity are quantified as a function of mix width and compared with experimental observations.