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Uncertainty budget for the NIST electron counting capacitance standard, ECCS-1

FEATURED ARTICLE

Mark W Keller1, Neil M Zimmerman2 and Ali L Eichenberger1,3

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We measure a cryogenic, vacuum-gap capacitor by two methods: (1) charging it with a known number of electrons and measuring the resulting voltage, and (2) using a capacitance bridge traceable to the SI farad. We report a detailed uncertainty budget for the comparison of the two methods and find that they agree within a relative standard uncertainty of 9.2 × 10−7. This comparison closes the quantum metrology triangle with the same uncertainty.


PACS

06.20.fb Standards and calibration

73.23.Hk Coulomb blockade; single-electron tunneling

84.37.+q Electric variable measurements (including voltage, current, resistance, capacitance, inductance, impedance, and admittance, etc.)

07.20.Mc Cryogenics; refrigerators, low-temperature equipment

Subjects

Electronics and devices

Instrumentation and measurement

Surfaces, interfaces and thin films

Dates

Issue 6 (December 2007)

Received 19 September 2007

Published 21 November 2007



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