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

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4 Author(s)
Tanaka, Y. ; Electron. Meas. Lab., Musashi Inst. of Technol., Tokyo, Japan ; Kitajima, H. ; Kodaka, M. ; Takada, T.

A new analysis of conduction current distributed in dielectrics based on simultaneous measurements of thermally stimulated current (TSC) and time dependent space charge distribution is proposed. A new system pulsed electro-acoustic (PEA) method has been developed to enable simultaneous measurement of the TSC and the dynamic space charge and electric field distributions as a function of temperature within insulators. With the new system, the relationship between the TSC and the time dependent electric field distribution in electron beam (e-beam) irradiated PMMA has been investigated. From the time dependent electric field, the displacement current in dielectrics is obtained. The TSC is a typical external current which is represented as an addition of the displacement current and a conduction current in dielectrics. This paper 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

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Dielectrics and Electrical Insulation, IEEE Transactions on  (Volume:5 ,  Issue: 6 )