An improved technique for space charge distribution measurements in solid dielectrics

A newly developed numerical analysis technique based on inverse matrix calculations is described. It is used to de-convolute electric current waveforms into the space charge and electric field distributions after subjecting solid dielectric samples to a thermal step and measuring the current induced in the external circuit by the perturbation of space charges in the material due to the heat flow. The technique gives significantly lower errors and requires less computation time than commonly used Fourier analysis.