Simulation of defects on micro-shells surface affecting power spectrum

In ICF experiment, the defects on micro-shells surface will affect the capsule implosion hydrodynamic instabitiy seriously. The relationship between the defects on micro-shell surface and power spectrum was analyzed theoretically and simulated. The results show that the root mean square roughness(RMS) of power spectrum increased with the increases of height and the rand noise, and decreased with the decrease of daimeter of defects. At the same time, the effect of defect’s height on power spectrum was more serious than that of defect’s diameter. And the RMS of power spectrum increased with the increase of defect’s quantity, and resulted in some periodic characteristic in power spectrum curve.