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Search Publications by: Richard L. Steiner ()

Displaying 26 - 50 of 100

Comparison of Two Josephson Array Voltage Standard Systems Using a Set of Zener References

April 1, 1999

Author(s)

Yi-hua D. Tang, Richard L. Steiner, June E. Sims

Two Josephson Array Voltage Standard Systems using different calibration algorithms are operated at the National Institute of Standards and Technology (NIST). A manual switch system is designed to make system comparisons by measuring against the 1.018 V of

Comparison of Two Josephson Array Voltage Standard Systems Using a Set of Zener References

April 1, 1999

Author(s)

Yi-hua Tang, Richard L. Steiner, June E. Sims

It is possible to compare Josephson-array voltage systems to parts in 10 9 via multi-Zener reference interchanges and ultra-low thermal-emf switching. These techniques were used to achieve a Type A uncertainty of 6 nV/V (k=2) at the 1/-19 V level, and to

The NIST Watt Balance: Recent Results and Future Plans

March 1, 1999

Author(s)

David B. Newell, Richard L. Steiner, Edwin R. Williams

The last remaining SI base unit defined by an artifact is the kilogram. The NIST watt balance has been designed to measure the ratio of mechanical to electrical power, linking the artifact kilogram, the meter, and the second to the practical realizations

An Accurate Measurement of the Planck Constant

September 1, 1998

Author(s)

Edwin R. Williams, Richard L. Steiner, David B. Newell

An Indirect Comparison Between Two Josephson Voltage Standard Systems With Different Algorithms

August 25, 1998

Author(s)

Yi-hua D. Tang, Richard L. Steiner, June E. Sims

Two Josephson Array Voltage Standard Systems using different calibration algorithms are operated at the National Institute of Standards and Technology. A manual system is designed to make comparisons by measuring against the 1.018 V of the three Zener

The Next Generation of the NIST Watt Balance

August 1, 1998

Author(s)

David B. Newell, Richard L. Steiner, Edwin R. Williams, Alain Picard

Reduction in the total uncertainty of the NIST Watt Balance is limited by the present configuration of the experiment. Most of the major relative uncertainty components arise from the fact that the experiment is performed in air. To reduce the contribution

An Accurate Measurement of Planck's Constant

July 1, 1998

Author(s)

Edwin R. Williams, Richard L. Steiner, David B. Newell

Using a moving coil watt balance, electric power measured in terms of the Josephson and quantum Hall effects is compared with mechanical power measured in terms of the meter, kilogram and second, we find the Planck constant h = 6.62606891(58) x 10 -34 Js

Experimental Noise Sources in the NIST Watt Balance

July 1, 1998

Author(s)

Richard L. Steiner, David B. Newell, Edwin R. Williams

The present NIST Watt Balance has a relative combined standard uncertainty of about 145 nW/W. The final results of this phase of the experiment are presented. Improvements in the Type B (nonstatistical) uncertainty contributions, along with several

Uncertainty Analysis of Josephson Voltage Standard System and Inter-Laboratory Comparison Experiment

July 1, 1998

Author(s)

Richard L. Steiner, Yi-hua D. Tang, June E. Sims, Alan F. Clark

High precision voltage calibrations are now regularly performed in industrial calibration laboratories with Josephson array voltage standard systems. A full uncertainty characterization cannot guarantee that the lowest possible uncertainty has been