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Author: douglas olson
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1. Metrology for comparison of displacements at the picometer level
Published: 7/31/2014
Authors: Jack A Stone Jr, Patrick F Egan, Jay H Hendricks, Gregory F Strouse, Douglas A Olson, Jacob E Ricker, Gregory E Scace, Donavon Gerty
Abstract: An apparatus capable of comparing displacements with picometer accuracy is currently being designed at NIST. In principle, we wish to compare one displacement in vacuum to a second, equal displacement in gas, in order to determine gas refractive inde ...

2. Hybrid Miniature Fabry-Perot Sensor with Dual Optical Cavities for Simultaneous Pressure and Temperature Measurements
Published: 4/15/2014
Authors: Hyungdae Bae, Yun David, Haijun Liu, Douglas A Olson, Miao Yu
Abstract: We present a miniature dual-cavity Fabry-Perot sensor fabricated at the tip of an optical fiber for simultaneous pressure and temperature measurements. The pressure sensing cavity is an extrinsic air cavity created on a polymer housing by using an op ...

3. Picometer Metrology for Precise Measurement of Refractive Index, Pressure, and Temperature
Published: 12/18/2013
Authors: Jack A Stone Jr, Patrick F Egan, Donavon Gerty, Jay H Hendricks, Douglas A Olson, Jacob E Ricker, Gregory E Scace, Gregory F Strouse
Abstract: Fabry-Perot interferometers can be used for very precise measurement of the refractive index of gasses. This can enable increased accuracy of interferometer-based length measurement. In addition, because the refractive index of a gas depends on its ...

4. Proficiency Testing for Pressure Calibration at the National Voluntary Laboratory Accreditation Program (NVLAP)
Published: 12/3/2013
Authors: Douglas A Olson, Thomas R Hettenhouser, Robert G Driver
Abstract: The National Voluntary Laboratory Accreditation Program (NVLAP) has initiated a proficiency testing program for calibration laboratories accredited for pressure, designated as NVLAP code 20/T05. This program involves measurements by the laboratory o ...

5. Picometer metrology for precise measurement of refractive index, pressure, and temperature
Published: 7/14/2013
Authors: Jack A Stone Jr, Patrick F Egan, Jay H Hendricks, Gregory F Strouse, Douglas A Olson, Jacob E Ricker, Gregory E Scace
Abstract: For several years we have been studying the use of Fabry-Perot interferometers for precise measurement of the refractive index of gasses, where the primary motivation has been to improve interferometer-based length measurement. Because the refractiv ...

6. Use of higher order Heydemann-Welch model to characterize a controlled clearance piston gauge
Published: 10/17/2012
Authors: Douglas A Olson, Shaker A Gelany, Alaaeldin A Eltawil
Abstract: We present measurements on characterizing a new controlled-clearance piston gauge made by Ruska (Fluke Calibration) which has a 290 MPa maximum pressure and a nominal piston diameter of 3.27 mm. We tested the piston gauge to jacket pressures of over ...

7. Faster, Better, Cheaper: New Automated Vacuum Calibration Service at NIST
Published: 10/1/2012
Authors: Jacob E Ricker, Jay H Hendricks, Douglas A Olson, Gregory F Strouse
Abstract: In today‰s fast-paced world and ever expanding quality assurance requirements, the National Institute of Standards and Technology (NIST) has developed a system to fill the need for faster, better, and cheaper low pressure calibrations (0.65 Pa to 130 ...

8. Results of a hydraulic pressure comparison in the range from 25 MPa to 200 MPa between NIS-Egypt and NIST-USA
Published: 2/28/2012
Authors: Douglas A Olson, Alaaeldin A Eltawil, Shaker A Gelany
Abstract: The results of an informal pressure comparison between the National Institute of Standards and Technology (NIST), USA, and the National Institute of Standards (NIS), Egypt, are presented. The comparison was aimed to determine degree of equivalence be ...

9. A gas pressure scale based on primary standard piston gauges
Published: 12/6/2010
Authors: Douglas A Olson, Robert G Driver, Walter J. Bowers Jr.
Abstract: The National Institute of Standards and Technology has redefined its gas pressure scale, up to 17 MPa, based on two primary standard piston gauges. The primary standard piston gauges are 35.8 mm in diameter and operate from 20 kPa to 1 MPa. Ten sec ...

10. Final report of key comparison CCM.P-K3 absolute pressure measurements in gas from 3E-6 Pa to 9E-4 Pa
Published: 3/31/2010
Authors: Douglas A Olson, Patrick J Abbott, Karl Jousten, Fiona J Redgrave, Pardeep Mohan, S S Hong
Abstract: This report describes a CCM key comparison of absolute pressure at five National Metrology Institutes (NMIs) that was carried out from August 1998 to May 2002. The goal of the key comparison was to determine the degree of equivalence at pressures in ...

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