Space charge distribution synthesis by multiphysics simulation: Application to the PWP techniques

Initially we have implemented a model based on the finite element method (FEM). This model consist in simulate experiments of space charge measurement: the principle of the various experiments consists in forcing the displacement of space charge by a pressure wave, temperature gradient or an electric excitation, and measuring the transitory current thus created at the boundaries of material or the sound emission associated to the generated movement. In this article, we propose an alternative to the traditional exploitation of the Pressure Wave Propagation techniques, based on a quasi-random approach of the space charge distribution by bringing together of the electric answers (experimented and simulated). Adopted methodology consists has to seek a space charge distribution, such as the simulated electric answer reaches a certain similarity with the experimentation. One shows as well as the space charge distribution can be obtained in a completely reversed way. Indeed this new methodology consists in finding the space charge distribution which gives a simulated electric answer nearest to that measured.