Preliminary measurements on dielectric materials by the pulsed electro-acoustic method using a ring electrode

In the last past thirteen years many Pulsed Electro Acoustic (PEA) set-ups have been developed to study space charge behavior in irradiated material mainly used for space applications. In this paper we will present our first measurements with a ring electrode. In these preliminary studies measurements are realized in the air. A dielectric film is polarized under a positive or a negative voltage then PEA measurements are realized using the open PEA set up and the new Open Ring Electrode (ORE). After the record of a reference signal and a deconvolution process, the space charge profile is obtained. We will compare and discuss the results recorded from both configurations and will explain which improvement still need to be brought.