In-Situ Polymerization of Foam Filled Laser Targets with Two Regions of Different Densities, Separated by a Thin Film

A method for the production of a foam filled target with two regions of different densities is described in this paper. These two different density regions are separated by a 1 μm thick film, with a roughness of 5 μm rms peak to valley. The two regions are filled with a homogeneous, different density foams. These targets were designed to investigate the Richtmyer-Meshkov instability in the plasma region. The production of these targets using the in-situ polymerization technique is described. Several approaches for the production of these targets are examined. Triacrylate foams with densities of 40 mg cm⁻³ and 200 mg cm⁻³ were used in the targets.