The influence of metal surface topography on ablation behavior during intense pulsed ion beam irradiation

As a flash heat source, intense pulse ion beam (IPIB) has extensive applications in material surface modification. The ablation effect during IPIB irradiation on target can impact the results of material modification. Therefore, the understanding of ablation mechanism is of great significance for IPIB application. In this work, to investigate the influence mechanism of surface topography on ablation behavior, pure zinc targets with different surface roughness were bombarded by IPIB with various energy densities at TEMP-4M accelerator. The experiments results showed that the ablation mass increased with the surface roughness increasing. Combining Monte Carlo method and finite element method, a heat conduction model was constructed to describe the ablation process of zinc target with different surface roughness. The simulation results agreed with the experiments, and the mechanism of ablation influenced by the surface topography was proposed.