Analysis and discussion on conduction current based on simultaneous measurement of TSC and space charge distribution

A new analysis of conduction current distributed in dielectrics based on si multaneous measurements of thermally stimulated current (Tsr) and time depe ndent space charge distribution is proposed. A new system pulsed electro-ac oustic (FEA) has been developed to enable simultaneous measurement of the T SC and the dynamic space charge and electric field distributions as a funct ion of temperature within insulators. With the new system, the relationship between the TSC and the time dependent electric field distribution in elec tron beam (e-beam) irradiated PMMA has been investigated. From the time dep endent electric field, the displacement current in dielectrics is obtained. The TSC is typical external current which is represented as an addition of the displacement current and a conduction current in dielectrics. This pap er makes it clear that the conduction current as a function of position is determined by the simultaneous measurement of the external current and the dynamic space charge distribution.