Thermally Stimulated Current Due to Dipolar Depolarization under a Temperature Gradient

Abstract
A thermally stimulated current measurement using a temperature gradient (TG–TSC measurement) has been applied to the study of dipolar depolarization in polymers. TG–TSC in the initial rise region has been theoretically analyzed and the effect of a temperature gradient has been clarified. The theoretical relation between TSC and TG–TSC is considered and a formula for TG–TSC is presented. We conclude that the experimental results on a cross-linked polyethylene (XLPE) film can be explained using the above relation and that the characteristics obtained from the above theoretical analysis can be used for ascertaining the presence of a constant temperature gradient in a film.