Simulation of Kinetic Electron Emission from Beryllium by keV Ion Impacts

概要

論文の詳細を見る
A Monte Carlo simulation model of ion-induced kinetic secondary electron emission from beryllium, a candidate material for plasma-facing components in thermonuclear fusion devices, is developed. In the model, the conduction electron excitation by a projectile ion and the cascade multiplication process of the excited electrons are involved in production of secondary electrons in the solid. Due to increase in the excitation probability, the secondary electron yield increases with increasing impact energy and initial charge state of the projectile, and decreasing mass of the projectile. Nevertheless, the majority of secondary electrons are produced through the cascade process, so that the peak of the energy distribution of secondary electrons depends little on the impact energy and the species of the projectile. Due to increase in the energy transferred from the projectile to the electrons, however, the distribution progressively broadens towards the high-energy side as the impact energy is increased or as the mass of the projectile is reduced.
社団法人応用物理学会の論文
1995-09-15