Study of the charge build up and transport in electron beam irradiated dielectric films

The Pulsed Electro Acoustic– PEA –method is used to perform space charge measurements in organic dielectrics subjected to electron beam irradiation as also during relaxation, under short-circuit and open-circuit conditions. A model based on GEANT 4 libraries for electron transport analysis has been developed in order to understand the behavior of space charge in space environment. Examples of measurements recorded on Polyimide films using various configurations are analyzed in the paper. A comparison between experimental data and simulated results shows that various complex phenomena are occurring simultaneously.