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You searched on: Author: weston tew

Displaying records 31 to 40 of 55 records.
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31. 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

32. 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

33. 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

34. A New Approach to Johnson Noise Thermometry Using a Quantum Voltage Noise Source for Calibration
Published: 6/1/2002
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 addresses certain limitations found in the conventional approach. The concept takes advantage of recent advances in digital synthesis and signal processing techniques together with ad ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=1083

35. A New Approach to Johnson Noise Thermometry Using a Josephson Quantized Voltage Source for Calibration
Published: 4/1/2002
Authors: Samuel Paul Benz, John M Martinis, Sae Woo Nam, Weston Leo Tew, Douglas R White
Abstract: We describe a new approach to Johnson Noise Thermometry (JNT) that addresses certain limitations found in the conventional approach. The concept takes advantage of recent advances in digital synthesis and signal processing techniques together with a ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830743

36. A New Approach to Johnson Noise Thermometry using a Josephson Quantized Voltage Source
Published: 4/1/2002
Authors: Samuel Paul Benz, John M. Martinis, Sae Woo Nam, Weston Leo Tew, D. R White
Abstract: We describe a new approach to Johnson Noise Thermometry (JNT) that addresses certain limitations found in the conventional approach. The concept takes advantage of recent advances in digital synthesis and signal processing techniques together with ad ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=30773

37. Standard Reference Material 1750: Standard Platinum Resistance Thermometers, 13.8033 K to 429.7485 K
Series: Special Publication (NIST SP)
Report Number: 260-139
Published: 11/1/2001
Authors: Weston Leo Tew, Gregory F Strouse
Abstract: The Standard Platinum Resistance Thermometer (SPRT) is defined by the International Temperature Scale of 1990 (ITS-90) as the interpolating instrument for temperatures between 13.8033 K and 1234.93 K. This SRM concerns the calibration properties of a ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830653

38. The Role of High-purity Noble Metals in Precision Thermometry
Published: 11/1/2001
Authors: Dean C Ripple, Gregory F Strouse, Weston Leo Tew
Abstract: A variety of alternate calibration schemes which approximate the ITS-90 are possible when using high-purity noble metals. The high purity of the sensor materials allows the use of correlations that exist between the measured properties at fixed point ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830763

39. Archival and Theoretical Considerations for Isotopic Dependence in the e-H^d2^ Fixed Points
Published: 6/1/2001
Authors: F Pavese, Weston Leo Tew, A G Steele
Abstract: We examine these isotopic dependence for the case of the e-H2 triple point (TP), and the two vapor pressure (VP) points of the ITS-90 defined near 33 kPa and 101 kPa. The archival experimental data allows predictions to be made for the shift in the T ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830740

40. Special Problems When Realising the Triple Point of Hydrogen as a Defining Fixed Point of the ITS-90
Published: 6/1/2001
Authors: B Fellmuth, D I Head, F Pavese, A Szmyrka-Grzebyk, Weston Leo Tew
Abstract: The two special problems, which appear when realising the triple point of hydrogen as a temperature fixed point due to the influences of the deuterium content and the catalyst, have been investigated by filling a large number of sealed triple-point c ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830758



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