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Polyimide is photoconductive under visible light, whose blue component is strongly absorbed. A consequence of this absorption is to induce a heterogeneous conductivity within the film. We present space charge and surface potential measurements which provide evidence for a progressive motion of the charge distribution towards the back electrode, in good accordance with a simple model, assuming stability...
Spacecraft are sometimes seriously damaged by electrostatic discharge in polymeric materials. Various polymeric materials are used for the surface materials of spacecraft, such as a MultiLayer Insulator (MLI) or an Optical Solar Reflector (OSR). They are charged up by irradiation of solar particles and high-energy charged particles, particularly those such as charged particles like electrons and protons...
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...
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