Effect of polycrystalline structure on helium plasma irradiation of tungsten materials

Abstract

Binary-collision-approximation-based (BCA-based) simulation is performed for the investigation of the effect of a polycrystalline structure on the penetration depth, absorption rate, and sputtering yield of tungsten materials irradiated by helium plasma. To clarify the possibility of suppressing the generation of helium bubbles in tungsten materials by designing the properties of the polycrystalline structure, such as grain size, the effect of the polycrystalline structure on helium bubble formation is also investigated.

Modelling the impact of argon atoms on a tungsten surface

“…To obtain atomic scale information about PFMs under irradiation, computational methods such as Monte Carlo (mostly based on the binary collision approximation, BCA) and molecular dynamics (MD) are used. BCA simulations very efficiently provide information at the microscopic level [17][18][19] but do not cover chemical effects [20]. Chemical bonding and reaction processes are especially important at lower impact energies [21].…”