CTMC study of collisions of carbon ions with H and He, relevant to magnetically confined fusion plasmas

At the beginning of the last decennium it was well understood that the balance of the impurity content of a magnetically confined plasma is dominated by interaction between plasma particles and the material walls. Accordingly, a systematic effort was oriented towards the study of the plasma-surface interaction and of the relevant atomic processes of ion-atom collisions. Atomic processes involving hydrogen, helium, carbon, oxygen and metallic impurities were of first priority in this domain. Systematic evaluation and compilation of cross sections relevant to fusion was already initiated by C.F. Barnett, founder of the ORNL Controlled Fusion Atomic Data Centre. The status of the atomic data base for reactions occurring mostly in the plasma core or concerning mainly the plasma heating by energetic ion beams has been reviewed elsewhere. Studies of H and He collisions involving metallic impurities or oxygen have been recently made available. The status of such data was recently reviewed. Here we concentrate to our calculations in progress of collision cross sections for the carbon ions colliding with hydrogen and helium. The CTMC method was used for calculating total ionisation and one electron capture cross sections for H-Cq+ collisions in the energy region of 10 to 5000 and of 1 to 1000 keV/u correspondingly. (author) 15 refs., 6 figs