|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Late News Poster Session
||N-41: Effect of the Surface Roughness of Tungsten on the Sputtering Yield Under Helium Irradiation: A Molecular Dynamics Study
||Hyeonho Kim, Kunok Chang
|On-Site Speaker (Planned)
The divertor is one of the armor materials in the nuclear fusion reactor that keeps plasma purity and temperature. Sputtering is a phenomenon in which components of the divertor are bounced off when helium ions are irradiated to the divertor. Research has been conducted to reduce sputtering because sputtering reduces the purity and temperature of the plasma. Previous experiment studies have been regulated sputtering yields by controlling the roughness of the divertor surface. In this study, we used molecular dynamics to simulate the sputtering of tungsten-based divertors. We quantitatively evaluated the effect of surface roughness on sputtering phenomena, compared the simulation results, and discussed differences from experimental results.
||Modeling and Simulation, Other, Nuclear Materials