The development of a dynamic radiation-surface interaction simulation code

Development of the dynamic binary collision approximation code SIBIDET (Simulation of Ion Beam Implantation in Dynamically Evolving Targets) has been continued under a new codename DYNAMIX (DYNamic transport of multi-Atom material MIXing). The code is capable of statically and dynamically simulating ion surface interactions, especially sputtering and ion mixing. A number of new features, including parallel computation capability, were incorporated into the code. A serial of benchmarking tests have been performed, and the results have been compared with available experiment measurements. The results indicate that static sputtering yields could be well predicted for incident energy from few hundreds eV to 25 keV/amu, with errors within 50%. Benchmarking of dynamic mode simulation has been limited by availability of experiment data with time variable. Yet the tested cases have shown good agreements with experiment data. The deposition of boron on molybdenum target and carbon on lithium target were studied as example of the use of the code. Both of these two cases are practical problems in the study of plasma facing component materials in fusion research. The simulations gave out the partial sputtering yields change and surface depth profile evolution as function of time, which is important for the study of the life time and the change of material performance.