Burning Plasma – Wall Interactions

Abstract

We have studied chemical sputtering, hydrogen retention and other products of particle-surface interactions in the least known, intermediate-to-low range of impact energies (1-30 eV/D), with atomic and molecular projectiles of deuterated amorphous carbon surfaces. Results from atomistic, molecular dynamics (MD) modeling using massive computation have been benchmarked against �in house� particle beam experiments, enhancing its predictive capabilities. We have extended previous MD simulations for well defined ion beam experiments to plasma-bombardment environments using predefined distributions of impact particles in energy, angle, and angular momentum. Initial comparison with available plasma-irradiation experimental data is encouraging. The quality of the existing interatomic potentials and research opportunities in the development of new potentials for mixed fusion materials are discussed.