Ablation of tungsten surfaces in collisions with Ar+, He+ and N2+ cation projectiles in the presence of D2

Surface ablation of tungsten, known as a plasma-facing material in fusion devices, was investigated mass-spectrometrically in ion beam-type experiments by exposing a tungsten surface in the presence of H2/D2 to fast atomic and molecular projectile ions with high electron-recombination energies (Ar+, He+ and N2+). The sputtered product ions were monitored by high resolution mass spectrometry, in the case of Ar+, at various beam energies, surface...