Abstract
Simulations for low-energy irradiation of nuclear Fusion plasma’s ion species on several plasma-facing materials were performed. This study is devoted to determining the minimum incident ion energy to cause sputtering or what is known as the “sputtering energy threshold” Eth. The simulations have been performed on various materials such as tungsten, graphite, and beryllium irradiated with various light ionic species such as helium, deuterium, and tritium. Two different Monte-Carlo-based simulation programs were used to perform this task. One of the latest versions of the state-of-the-art SDTrimSP simulation program was used in this study and complemented by the RDS-BASIC simulation program which was specifically designed to perform reasonably accurate and detailed calculations for the low–energy ions irradiation. The later simulation program also adopts a special and more realistic treatment accounting for the reduction in the atomic displacement threshold in the top surface monolayer. The simulation results were also compared with experimental data and theoretical data fittings.
Published Version
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