A diffusion model for light scattering in ejecta
Abstract
We derive a diffusion equation for light scattering from ejecta produced by extreme shocks on metallic samples. This model is easier to handle than a more conventional model based on the Radiative Transfer Equation (RTE) and is a relevant tool to analyze spectrograms obtained from Photon Doppler Velocimetry measurements in the deep multiple scattering regime. We also determine the limits of validity of the diffusive model compared to the RTE, based on a detailed analysis of various ejecta properties in configurations with increasing complexity.
Article Details
Journal Info
Journal of Applied Physics
American Institute of Physics
Authors (5)
J. A. Don Jayamanne
CEA DIF, Bruyères-le-Châtel 1 , 91297 Arpajon Cedex,
J.-R. Burie
CEA DIF, Bruyères-le-Châtel 1 , 91297 Arpajon Cedex,
O. Durand
CEA DIF, Bruyères-le-Châtel 1 , 91297 Arpajon Cedex,
R. Pierrat
Institut Langevin, ESPCI Paris, PSL University, CNRS 2 , 75005 Paris,
R. Carminati
Institut Langevin, ESPCI Paris, PSL University, CNRS 2 , 75005 Paris,