Fractality of Electrostatic Microdischarges on the Surface of Polymers

T. Ficker, V. Kapička, J. Macur, P. Slavíček, P. Benešovský

Abstract


Ramified Lichtenberg figures caused by electrostatic microdischarges on the surface of polymeric polyethylene terephthalate have been studied. They occurred in consequence of the previous electret forming of the polymeric sheets and were initiated in the air gap between the grounded electrode and the polymeric sheets. Multifractal image analysis was used to determine the fractal dimensions of the Lichtenberg patterns in dependence on the loading voltages used for electret forming.

Keywords


Electrostatic microdischarges; Lichtenberg figures; multifractal formalism; fractal dimension; electret saturated states

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ISSN 1210-2709 (Print)
ISSN 1805-2363 (Online)
Published by the Czech Technical University in Prague