PSpice modeling of the acoustic detector for a pulsed electro-acoustic cell

This study aims at improving the spatial resolution for the pulsed electro-acoustic method - PEA. Indeed, the actual spatial resolution of this method is in order of ten μm while dielectric films used as thermal regulators in the structures of the satellites and analyzed by the PEA method are around 50-μm-thick. Also a better resolution is expected to provide a better description of charges in these materials. Previous studies have shown that the spatial resolution is strongly linked to the acoustic waves' propagation in the PEA measurement cell. In this respect, the acoustic detector, which is the key of the PEA method, must be optimized in order to improve the performance of this method. This work is focused on the model of the acoustic detector created with the commercial software PSpice and based on the Mason-Redwood model. It permits analysis of the influence of the piezoelectric transducer's losses and of the nature of the absorber on the output voltage signal.