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Author: weston tew

Displaying records 21 to 30 of 52 records.
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21. Comment on Freezing Point Mixtures of H^d2^^u16^O With H^d2^^u17^O and Those of Aqueous CD^d3^CH^d2^OH and CH^d3^^u13^CH^d2^OH Solutions
Published: 10/1/2005
Authors: Weston Leo Tew, D. R White
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830914

22. Isotopic and Other Influences of the Realization of the Triple Point of Hydrogen
Published: 8/1/2005
Authors: B Fellmuth, L Wolber, Y Hermier, F Pavese, PPM Steur, I Peroni, A Szmyrka-Grzebyk, L Lipinski, Weston Leo Tew, H Nakano, H Sakurai, O Tamura, D I Head, K D Hill, A G Steele
Abstract: Within an international collaboration of the eight metrological institutes represented by the authors, the dependence of the triple-point tmeperature of equilibrium, hydrogen on the deuterium content at low concentrations has been precisely determine ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830949

23. Progress on Johnson Noise Thermometry using a Quantum Voltage Noise Source for Calibration
Published: 4/1/2005
Authors: Sae Woo Nam, Samuel Paul Benz, Paul David Dresselhaus, Charles J Burroughs, Weston Leo Tew, D. R White, John M. Martinis
Abstract: We describe our progress towards a high-precision measurement of temperature using Johnson noise. Using a Quantized Voltage Noise Source (QVNS) based on the Josephson effect as a calculable noise source, we have been able to measure the ratio of the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=31750

24. Double Anomalous Peak in the Heat Capacity Just Below the Triple Point of Staurated e-H^d2^ With FeO(OH)^u1
Published: 1/1/2005
Authors: T Nakano, Weston Leo Tew, O Tamura, H Sakurai
Abstract: The heat capacity of e-Hd2 with powder ofFeO(OH) used as a catalyst for ortho-para equilibration has been investigated using sealed cells fabricated at the National Institute of Standards and Technology and at the National Metrology Institute of Japa ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830908

25. CCT Key Comparison No 1 (CCT-K1): Realisations of the ITS-90, 0.65 K to 24.5561 K, Using Rhodium-Iron Resistance Thermometers
Published: 6/1/2004
Authors: R L Rusby, Christopher W Meyer, Weston Leo Tew, D I Head, K D Hill, O Tamura, P A. de Groot, B Fellmuth, A Storm, A Peruzzi, J Engert, D N Astrov, Y Dedikov, G A Kytin
Abstract: At its meeting in 1996 the CCT initiated five Key Comparisons to test the equivalence of realisations of the ITS-90 between National Measurement Institutes. CCT-K1 covers the temperature range from 0.65 K to 24.5561 K, in which the ITS-90 is defined ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830884

26. Johnson Noise Thermometry Using a Quantum Voltage Noise Source for Calibration
Published: 6/1/2004
Authors: Sae Woo Nam, Samuel Paul Benz, Paul David Dresselhaus, Weston Leo Tew, D. R White, John M. Martinis
Abstract: We describe our progress towards a high-precision measurement of temperature using Johnson noise. Using a Quantized Voltage Noise Source (QVNS) based on the Josephson effect as a calibrated noise source, we have been able to measure the gallium and w ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=31626

27. Johnson Noise Thermometry Measurements Using a Quantized Voltage Noise Source for Calibration
Published: 4/1/2003
Authors: Sae Woo Nam, Samuel Paul Benz, Paul David Dresselhaus, Weston Leo Tew, D. R White, John M. Martinis
Abstract: We describe a new approach to Johnson Noise Thermometry(JNT) that takes advantage of recent advances in Josephson voltage standards and digital signal processing techniques. Currently, high-precision thermometry using Johnson noise is limited by the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=30118

28. A ratiometric method for Johnson noise thermometry using a quantized voltage noise source
Published: 1/1/2003
Authors: Sae Woo Nam, Samuel Paul Benz, John M. Martinis, Paul David Dresselhaus, Weston Leo Tew, D. R White
Abstract: Johnson Noise Thermometry (JNT) involves the measurement of the statistical variance of a fluctuating voltage across a resistor in thermal equilibrium. Modern digital techniques make it now possible to perform many functions required for JNT in highl ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=30325

29. Recent Results of NIST Realizations of the ITS-90 Below 84 K
Published: 1/1/2003
Authors: Weston Leo Tew, Christopher W Meyer
Abstract: The results at NIST of realizations and comparisons of the ITS-90 below 84 K are presented. The 3He and 4He vapor pressure scales (0.65 K to 5.0 K), and the interpolating constant volume gas thermometer (ICVGT) scale (5.0 K to 24.556 K) as realized f ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830804

30. The NIST Low Temperature ITS-90 Realization and Calibration Facilities
Published: 10/1/2002
Authors: Christopher W Meyer, Weston Leo Tew
Abstract: Two facilities have been constructed at NIST for realizing and maintaining the ITS-90 below 84 K. The first facility is an integrated low temperature realization system that realizes the ITS-90 below 84 K in its entirety and which we refer to as the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830798



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