H+–He(1s2) collisions: CTMC calculations of single ionisation and excitation cross sections

Abstract

The processes of helium single ionisation and excitation by proton impact are reviewed for the collision energy region relevant to He beam fusion edge plasma diagnostics (proton energy 10<E<50keV). Classical trajectory Monte Carlo (CTMC) calculations have been performed and compared with the existing data. Obtained results for single ionisation are close to available experimental data, while for excitation they are larger by up to a factor of two. For excitation into high quantum numbers, the n−3 scaling law is verified by our CTMC calculations.