NIST logo

Publications Portal

You searched on: Author: Keith Gillis

Displaying records 1 to 10 of 30 records.
Resort by: Date / Title


1. "Weighing" a Gas With Microwave and Acoustic Resonances
Published: 3/24/2015
Authors: Keith A Gillis, James B. Mehl, James W Schmidt, Michael R Moldover
Abstract: With calibrations of large flow meters in mind, we established the feasibility of determining the mass {I}M{/I}of argon gas contained within a 0.3 m^u3^ commercially manufactured pressure vessel ("tank") with a relative uncertainty of {I}u{/I}^dr^({I ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=917698

2. Microwave Determination of the Volume of a Pressure Vessel
Published: 12/9/2014
Authors: Michael R Moldover, James W Schmidt, Keith A Gillis, James B. Mehl, John D Wright
Abstract: Using microwave techniques that are scalable to very large volumes, we measured the interior volume of a 0.3 m^u3^, commercially-manufactured, pressure vessel with an uncertainty of 0.05 %, as confirmed by independent, more-accurate, gas-expansion me ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=917302

3. Improved Determination of the Boltzmann Constant using a Single, Fixed-Length Cylindrical Cavity
Published: 8/27/2013
Authors: Hong Lin, Keith A Gillis, XiaoJuan Feng, Michael R Moldover, J.P. Sun, J.T. Zhang, Y.Y. Duan
Abstract: We report improvements to our previous [Zhang et al., Intl. J. Thermophysics, 32, 1297 (2011)] determination of the Boltzmann constant kB using a single 80 mm-long cylindrical cavity. In this work, the shape of the gas-filled resonant cavity is clos ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913803

4. Calibration of a Long-Wavelength Acoustic Flowmeter Using a Lumped Impedance Acoustic Model
Published: 8/26/2013
Authors: Lee James Gorny, Keith A Gillis, Michael R Moldover
Abstract: As a part of NIST‰s program to standardize measurements of greenhouse gas emissions, we are developing long-wavelength acoustic flowmeter (LWAF) for accurate, economical measurement of flue gas flows, for example, from coal-burning power plants. A L ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914137

5. Determination of mass-specific optical cross sections of multicomponent aerosols by combining electrical mobility and mass separation with laser absorption and extinction spectroscopy
Published: 7/22/2013
Authors: James G Radney, Xiaofei Ma, Keith A Gillis, Michael Russel Zachariah, Joseph Terence Hodges, Christopher D Zangmeister
Abstract: The optical properties of atmospheric aerosols vary widely, being dependent upon particle composition, morphology and mixing state. This diversity and complexity of aerosols motivates measurement techniques that can discriminate and quantify a variet ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913977

6. Microwave measurements for gas thermometry up to the copper point
Published: 5/13/2013
Authors: XiaoJuan Feng, Keith A Gillis, Michael R Moldover, James B Mehl
Abstract: We measured 5 microwave resonance frequencies {I}f{/I}^dN^ of an argon-filled cylindrical cavity at temperatures up to 1349 K. The repeatability of both the measured frequencies {I}u{/I}({I}f{/I}^dN^) and the scaled half-widths {I}u{/I}({I}g{/I}^dN^ ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913447

7. Second-order boundary corrections to the radial acoustic eigenvalues for a spherical cavity
Published: 8/17/2012
Author: Keith A Gillis
Abstract: We calculated the eigenvalues of the radially-symmetric acoustic modes of a gas-filled, spherical cavity to order ({delta}^dT^/{I}a{/I})^u2^, where {delta}^dT^ is the thickness of the thermal boundary layer and {I}a{/I} is the radius of the cavity. O ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911620

8. Room Temperature Acoustic Transducers for High-Temperature Thermometry
Published: 7/9/2012
Authors: Dean C Ripple, William E. Murdock, Gregory F Strouse, Keith A Gillis, Michael R Moldover
Abstract: We have successfully conducted highly-accurate, primary acoustic thermometry at 600 K using a sound source and a sound detector at room temperature. We describe the source, the detector, and the ducts that connected them to our cavity resonator. Thi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910927

9. TESTING LONG-WAVELENGTH ACOUSTIC FLOWMETER CONCEPTS FOR FLUE GAS FLOWS
Published: 6/22/2012
Authors: Lee James Gorny, Keith A Gillis, Michael R Moldover
Abstract: As a part of NIST‰s program to standardize measurements of greenhouse gas emissions, we are developing a long-wavelength acoustic flowmeter (LWAF) for accurate, economical measurements of exhaust flows from coal-burning power plants. Measurements of ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911460

10. Progress toward redetermining the Boltzmann constant with a fixed-path-length cylindrical resonator
Published: 5/21/2011
Authors: Jintao Zhang, H. Lin, X.J. Feng, J.P. Sun, Keith A Gillis, Michael R Moldover, Y.Y. Duan
Abstract: We used a single, fixed-path-length cylindrical-cavity resonator to measure {I}c{/I}^d0^ = (307.8252 {+ or -} 0.0012) m{bullet}s^u−1^, the zero-density limit of the speed of sound in pure argon at the temperature of the triple point of water. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907610



Search NIST-wide:


(Search abstract and keywords)


Last Name:
First Name:







Special Publications:

Looking for a NIST Special Publication (NIST SP Series)? Place the series number and dash in the report number field (Example: 800-) and begin your search.

  • SP 250-XX: Calibration Services
  • SP 260-XX: Standard Reference Materials
  • SP 300-XX: Precision Measurement and Calibration
  • SP 400-XX: Semiconductor Measurement Technology
  • SP 480-XX: Law Enforcement Technology
  • SP 500-XX: Computer Systems Technology
  • SP 700-XX: Industrial Measurement Series
  • SP 800-XX: Computer Security Series
  • SP 823-XX: Integrated Services Digital Network Series