An Estimation Method of Surface Defects of LMJ Microshells

This paper presents the development of a radiographic characterization method for microshells. In Laser MegaJoule (LMJ) framework, microshells are tiny plastic spheres used in inertial fusion laser experiments. For this work, these were characterized using low-energy radiography. microshell radiographs, phase contrast was noted at edges The origin phenomenon has been identified as sharp variation gray-scale amplitude due to refraction. Our theoretical model links pixel information with geometry and is contour detection characterization. Finally, an estimation surface defects described by spherical harmonics calculated.