Numerical Study on the Ablation Effects of Tungsten Irradiated by High-intensity Pulsed Ion Beam

Based on the ion current density model of TEMP type ion beam accelerator, and utilizing the deposited energy of the high-intensity pulsed ion beam (HIPIB) in tungsten by Monte Carlo method as source term, a two-dimensional thermal conduction model controlling the irradiation process was built. The evolution of tungsten temperature during the irradiation period was obtained and analyzed. The results show that the melted thickness of tungsten surface is about 0.3 μm at shooting center of target irradiated by HIPIB at the end of a pulse under the ion peak current density of 100 A/cm2, the materials of tungsten surface in thickness of about 0.2 μm reach boiling point; and among the ion peak current density of 50-200 A/cm2, the melting ablation depth is less than 1 μm according to the calculation. While the ion peak current density increased to about 330 A/cm2, the vaporizing ablation phenomenon appeared on the shooting center of tungsten surface.