THEORETICAL STUDY OF THE SECONDARY ELECTRON EMISSION OF INSULATING TARGETS

摘要

We study the electron-induced secondary electron emission of insulating targets by a Monte-Carlo simulation method. The most important collision mechanisms in the energy domain considered are investigated. The usual approximations apparently overestimate the elastic collision rate and empirical corrections are proposed. The self-trapping of the charges is explained by the polarization of the surrounding medium. The role of the polaronic effects in the secondary emission as well as the sensibility of the results to the choice of the different parameters are analyzed. The influence of an internal electric field caused by a ''frozen'' charge distribution is also investigated. References: 53