Material Temperature Dependence of the Retention and Sputtering Yield of Single-Crystal Graphite under Hydrogen Plasma Irradiation

Seiki SAITO, Masayuki TOKITANI, Hiroaki NAKAMURA
2015 Plasma and Fusion Research  
Carbon is a candidate material for divertor plates in nuclear fusion devices. To investigate the erosion and hydrogen retention in carbon at the atomic scale, we performed molecular simulations of hydrogen injection into single-crystal graphite considering the thermal vibration of the target atoms, the diffusion of incident atoms in the target material, and the structural relaxation of the target material. Then, the dependence of hydrogen retention and sputtering yield on material temperature was investigated in detail.
doi:10.1585/pfr.10.3403075 fatcat:63bpg5ovcfeqrd4ms7hohfazoe