Discharge velocity effects across charged insulator surfaces

Abstract

Surface discharge velocity measurements are reported. An aluminium strip fixed on the underside of a polyester film trapped corona charge on the surface and guided the discharge initiated by a 100 ns voltage pulse of between 10 to 30 kV. The surface charge was of opposite polarity to the voltage pulse. Results for the discharge velocity under various conditions are presented and indicate that both surface charge and the voltage pulse are responsible for driving the discharge across the length of the polyeste

Plasma-surface interaction: dielectric and metallic targets and their influence on the electric field profile in a kHz AC-driven He plasma jet

“…In this way it causes a 'memory effect' on the surface. It has been shown, for example, that the speed of surface discharges on low-permittivity dielectrics is the biggest for pre-deposited charge of the opposite polarity [65][66][67][68]. The charge can be emitted from the surface by photoemission of electrons [51][52][53][69][70][71] or negative ion detachment [54,72].…”