Simulation Of Hydrogen Ion Beam Bombardment On Target Material

High-energy Ion Beam has been widely used in recent 20 years, and is becoming more and more important for material science. We analyze High-energy ion beam bombardment on the first wall material of tokamak, which is based on the background of nuclear fusion reactor design. With the social development, fusion energy as a new type of energy has attracted the attention of people. The international Thermonuclear Experimental Reactor(ITER) was established in France in 2006, including China,the United States,European Unio,Japan and other countries. Tremendous progress has been made in experimental engineering and theoretical research, but in several key technical issues, it still needs work hard to breakthrough. The problem discussed in the paper is one of the key issues to be resolved in ITER program.There are three major methods for studying the energetic particle beam interaction with the target materials. Molecular dynamic and quantum theory can be used to deal with particles with low energy on a microscopic scale; For a macroscopic scale, fluid theory can be considered; In this project, PSI (Plasma-surface Interaction) is studied by Monte-Carlo method, which is based on two-body collision theory.SDtrimSP derived from German is mainly used to simulate hydrogen ions interaction with different target materials in the paper. Physical quantities such as penetration depths sputtering coefficient,particle reflection coefficient,energy distributions of hydrogen ion backscattering and energy distribution of backward sputtered atoms can be obtained. In the meantime, hydrogen ions interaction with nickel at different angles is also considered in this paper. For the suitability of a new-designed wall material, i.e. a thin layer tungsten coating on graphite substrate, we also make similar investigation and compare the simulation results on the new wall material with those on graphite and tungsten.