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Macroscopic variations of surface potentials of conductors (1991)

Camp, J. B. ; Darling, T. W. ; Brown, Ronald E.

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 69 (1991), S. 7126-7129

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ISSN: 1089-7550

Source: AIP Digital Archive

Topics: Physics

Notes: The surface potential variations of the following conductors have been measured over a 0.7 cm2 area: bronze, NiP, conducting polymer (polyaniline), Al, Cu, Au, and graphite. The measurements were performed with a Kelvin probe of spatial and potential resolution of 1.5 mm and 1 mV, respectively. Subjecting the surfaces to no cleaning procedure other than a low temperature ultrahigh vacuum bake, we find a wide spectrum of variation in surface potential uniformity, with alloys typically the least uniform and nonreactive surfaces such as gold and graphite the most uniform (no fluctuations above the 1 mV probe sensitivity). Application of these results to the Los Alamos antiproton gravity experiment is discussed.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.347601

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