Spectroscopically Characterizing Radiation Flow in Stochastic Media*

Precise characterization of radiation flow experiments is required to distinguish among transport models. Cassio radiation-hydrodynamics simulations are used to design experimental platforms at the OMEGA Laser Facility that can measure the radiation flow using the spatially-resolved COAX absorption spectroscopy diagnostic. The simulations model radiation flow through stochastic media foam configurations containing optically thick clumps that are heterogeneously dispersed within an optically thin background aerogel. The radiation flow can be characterized within inhomogeneous configurations (specific initial conditions of a stochastic media), within homogeneous foams containing the same amount of component particles as the inhomogeneous configurations, and within the background-only material. Spectroscopy measurements are obtained of both the optically thick clumps and optically thin background, simultaneously.