Numerical Study on the Two-Dimensional Temperature Fields of Titanium/Aluminum Double-Layer Target Irradiated by High-Intensity Pulsed Ion Beam

摘要

Interaction between high-intensity pulsed ion beam (HIPIB) and a double-layer targetwith titanium film on top of aluminum substrate was simulated. The two-dimensional nonlinearthermal conduction equations, with the deposited energy in the target taken as source term, werederived and solved by finite differential method. As a result, the two-dimensional spatial andtemporal evolution profiles of temperature were obtained for a titanium/aluminum double-layertarget irradiated by a pulse of HIPIB. The effects of ion beam current density on the phase stateof the target materials near the film and substrate interface were analyzed. Both titanium andaluminum were melted near the interface aRer a shot when the ion beam current density fell inthe range of 100 A/cm^2 to 200 A/cm^2.