Hv Charging Technique and TSD Studies of Polyethylene Thermo-Electrets

Specially-shaped PE samples as thin as 200 , um in their middle part and becoming thicker toward the edges have been machined from 3 cm thick slabs. Such samples have been charged under high dc voltage in the range of 20 kV, without any corona leakage. TSD studies have been carried out using both the common method and a new differential technique. The interpretation, involving the assumption of a floating space charge according to Leal Ferreira´s model, agrees with our experimental results.