New developments in the TSD-analysis of electrets

Modifications of thermally stimulated discharge (TSD) measurements for electrets have been developed to resolve the spatial distribution of the trapped charges. They invoke the use of thermal or pressure waves in order to deform the charged dielectric locally. It is often illuminating to backup TSD with dielectric relaxation spectroscopy (DRS), since TSD is related to DRS in several ways. So we can often borrow from DRS and TDS (time domain spectroscopy) to advance the analysis of TSD. This allows one to broaden the TSD modelling to other functions than KWW, which only relies on one shape parameter. We can also extent the analysis by invoking special distribution functions taken in part from statistics.