In situ characterization technique of fuel ice layer for ICF cryotargets

Backlit shadowgraphy is an effective method for characterizing fuel ice in ICF cryotargets. Based on backlit shadowgraphy, the ice layer in situ characterization system can monitor the phase transformation and ice layering process of fuel in real-time as well as provide thickness and roughness of fuel ice before target shooting for physical experiments. In the experiments of cryotarget preparation, the thickness and inner roughness of fuel ice layer were calculated by the ray tracing simulation of backlit shadowgraphy and the position of bright ring in shadowgraph.