Determination of the time-dependence of. Omega. /sub NBS/ using the quantized Hall resistance

Journal Article · Fri Mar 31 23:00:00 EST 1989 · IEEE (Institute of Electrical and Electronics Engineers) Transactions on Instrumentation and Measurement; (USA)

DOI:https://doi.org/10.1109/19.192285· OSTI ID:5147614

Cage, M E; Dziuba, R F; VanDegrift, C T; Yu, D ^[1]

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1. National Inst. of Standards and Technology, Gaithersburg, MD (USA)

The authors discuss the quantum Hall effect being used to monitor the U.S. legal representation of the ohm, or as-maintained ohm, {Omega}/sub NBS/. Measurements have been made on a regular basis since August 1983. Individual transfers between the quantized Hall resistance R/sub H/ and the five 1-{Omega} resistors which comprise {Omega}/sub NBS/ can now be made with a total one standard deviation (1{sigma}) uncertainty of +-0.014 ppm. This uncertainty is the root-sum-square of 32 individual components.

• OSTI ID: 5147614
• Journal Information: IEEE (Institute of Electrical and Electronics Engineers) Transactions on Instrumentation and Measurement; (USA), Journal Name: IEEE (Institute of Electrical and Electronics Engineers) Transactions on Instrumentation and Measurement; (USA) Vol. 38:2; ISSN IEIMA; ISSN 0018-9456
• Country of Publication: United States
• Language: English

Related Subjects

656100* -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
EFFICIENCY
ELECTRIC CONDUCTIVITY
ELECTRICAL EQUIPMENT
ELECTRICAL PROPERTIES
EQUIPMENT
HALL EFFECT
MEASURING METHODS
PHYSICAL PROPERTIES
QUANTIZATION
QUANTUM EFFICIENCY
RESISTORS
SUPERCONDUCTIVITY
TIME DEPENDENCE