Using the λ function to evaluate probe measurements ofcharged dielectric surfaces |
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Authors: | Rerup TO Crichton GC McAllister IW |
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Affiliation: | Dept. of Electr. Power Eng., Tech. Univ., Lyngby ; |
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Abstract: | The use of Pedersen's λ function to evaluate electrostatic probe measurements of charged dielectric surfaces is demonstrated. With a knowledge of the probe λ function, the procedure by which this function is employed is developed, and thereafter applied to a set of experimental measurements available in the literature. The values of surface charge density derived are in good agreement with the published data. Through this field-theoretical approach, it is readily shown that areas of charge remote from the probe location can produce a major part of the probe signal. If a circuit-theory approach were adopted to analyze such probe measurements, then as the held features of the probe response cannot be taken into account, a serious misinterpretation of the measurements could arise |
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