Study of dynamic behavior of trapped charge in the insulating materials by using a new experimental approach

A new experimental procedure is proposed which uses the Scanning Electron Microscope Mirror Effect (SEMME) for the dynamic investigation of charge trapping in insulating materials. This experimental procedure allows to the mirror method which is usually described as static to be considered as dynamic. The dynamic trapping properties of the polymethyl-methacrylate (PMMA) polymer material are investigated and the time constants of charge processes are evaluated for various accelerating voltages. The experimental results reveal that the values of trapped charge at steady state obtained by the proposed procedure are in good agreement with these obtained using the electrostatic influence method (EIM) under the identical experimental conditions of electron irradiation.