Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With voltage or current conversion
Patent
1988-03-28
1989-02-14
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With voltage or current conversion
324122, 324123R, 324 714, G01R 1918, G01R 130, G01N 2700
Patent
active
048049093
ABSTRACT:
An atto amperemeter includes a shop tip (1) correctable to a voltage source (18) providing a known potential (U') via a sample conductor measured, the tip (1) faces a particle detector such as an electron multiplier (4). The count of the free electrons being emitted from the tip (1), multiplied by the electron multiplier (4) and counted by an electronic current (i) passing through the sample conductor (17). Calibration of the arrangement is performed by temporarily connecting the tip (1) to ground and applying a calibration potential (U cal) to a calibrated electrode (3) aligned with the tip (1) and the channel electron multiplier (4).
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H. Hubner, "First Results of a Microwave Field Emission Cathode", Optik, vol. 64, No. 2, May 1983, pp. 113-123.
Fink, H., "Mono-Atomic Tips for Scanning Tunneling Microscopy," IBM Journal of Research and Development, vol. 30, No. 5, pp. 460-465 (Sep. 1986).
Kurz, E. A., "Channel Electron Multipliers," American Laboratory (Mar. 1979).
Eisenzopf Reinhard J.
International Business Machines - Corporation
Nguyen Vinh P.
Schechter Marc D.
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