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Author: dana defibaugh
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1. Long-term stability of metal-envelope enclosed ionization gauges
Published: 12/1/2012
Authors: James A Fedchak, Dana R Defibaugh
Abstract: Ionization vacuum gauges are used as secondary standards by calibration laboratories and as transfer standards in intercomparisons among metrology laboratories. A quantitative measurement of gauge stability with respect to the gauge calibration fact ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911249

2. Precise conductance measurements of a pinhole orifice using a constant-pressure flowmeter
Published: 12/1/2012
Authors: James A Fedchak, Dana R Defibaugh
Abstract: A pinhole orifice with a known conductance can be used as the basis of a flowmeter. Commercially available laser-drilled pinhole orifices with diameters ranging from 1.0 μm to 50 μm can have conductances ranging from about 0.1 μL/s to ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908391

3. Interlaboratory comparison of Helium Low Gas Flow Measurements in the range 10-13 to 10-11 mol/s (10-9 to 10-7 cm3/s)
Published: 3/1/2010
Authors: Dana R Defibaugh, Patrick J Abbott, James A Fedchak
Abstract: An interlaboratory comparison (ILC) of helium low flow measurement capability was recently completed. The comparison was piloted by The National Institute of Standards and Technology (NIST); the majority of the data was taken over a period of approx ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902575

4. Progress in Primary Acoustic Thermometry at NIST: 273 K to 505 K
Published: 9/1/2003
Authors: Gregory F Strouse, Dana R Defibaugh, Michael R Moldover, Dean C Ripple
Abstract: The NIST Acoustic Thermometer determines the thermodynamic temperature by measuring the speed of sound of argon in a spherical cavity. We obtained the thermodynamic temperature of three fixed points on the Interna-tionalTemperature Scale of 1990: the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830838

5. Techniques for Primary Acoustic Thermometry to 800 K
Published: 9/1/2003
Authors: Dean C Ripple, Dana R Defibaugh, Michael R Moldover, Gregory F Strouse
Abstract: The NIST Primary Acoustic Thermometer will measure the difference between the International TemperatureScale of 1990 and the Kelvin Thermodynamic Scale throughout the range 273 K to 800 K with uncertainties of only afew millikelvins. The acoustic the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830839

6. Thermodynamic Properties of Sulfur Hexafluoride
Published: 5/1/2000
Authors: John J. Hurly, Dana R Defibaugh, Michael R Moldover
Abstract: We present new vapor phase speed-of-sound data u(P,T), new Burnett density-pressure-temperature data {rho}(P,T), and a few vapor pressure measurements for sulfur hexafluoride (SF^d6^). The speed-of-sound data spanned the temperature range 230 K {le ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=831562

7. Primary Acoustic Thermometry for Use Up to 800 K
Published: 12/1/1999
Authors: Dean C Ripple, Dana R Defibaugh, Keith A Gillis, Michael R Moldover
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=100632

8. Primary Acoustic Thermometer for Use Up to 800 K
Published: 4/1/1999
Authors: Dean C Ripple, Dana R Defibaugh, Keith A Gillis, Michael R Moldover
Abstract: Primary acoustic thermometers determine the thermodynamic temperature of a monatomic gas from measurements of the speed of sound in the gas. Here, we describe the design and construction of an acoustic thermometer designed to operate at temperatures ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830628

9. Vapor Pressure of 2-(Difluoromethoxy)-1,1,1-trifluoroethane CHF^d2^OCH^d2^CF^d3^ (HFE-245)
Published: 8/5/1998
Authors: A R. Goodwin, Dana R Defibaugh, L A. Weber
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901929

10. Compressed and Saturated Liquid Densities for 18 Halogenated Organic Compounds
Published: 12/1/1997
Authors: Dana R Defibaugh, Michael R Moldover
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=100411



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