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You searched on: Author: Patrick Abbott

Displaying records 1 to 10 of 16 records.
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1. The dissemination of mass in the United States: Results and implications of recent BIPM calibrations of US National Prototype Kilograms
Series: Journal of Research (NIST JRES)
Report Number: 119.001
Published: 3/12/2014
Authors: Zeina Jabbour Kubarych, Patrick J Abbott
Abstract: The National Institute of Standards and Technology (NIST) is responsible for the dissemination of the unit of mass within the United States of America through the national prototype kilogram K20 and its check standard K4. These platinum-iridium ...

2. Vacuum technology considerations for mass metrology
Published: 7/1/2011
Authors: Patrick J Abbott, Zeina Jabbour Kubarych
Abstract: Vacuum weighing of mass artifacts eliminates the necessity of air buoyancy correction and its contribution to the measurement uncertainty. Vacuum weighing is also an important process in the experiments currently underway for the redefinition of th ...

3. Safely mounting glass viewports to elastomer sealed vacuum flanges
Published: 6/17/2010
Authors: Patrick J Abbott, Brian R Scace
Abstract: Elastomer sealed vacuum flanges rely on specially sized elastomer O-rings and corresponding grooves to make an air-tight seal. Depending on the materials being sealed to one another, the O-ring/groove sealing mechanism may be designed for a specific ...

4. 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 ...

5. 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 ...

6. Linking Air and Vacuum Mass Measurement by Magnetic Levitation
Published: 5/12/2009
Authors: Zeina Jabbour Kubarych, Patrick J Abbott, Edwin Ross Williams, Ruimin Liu, Vincent J Lee, Hung-Kung Liu
Abstract: This paper describes a new approach to directly link air and vacuum mass measurements using magnetic levitation techniques. This procedure provides direct traceability to national standards, presently defined in air, without requiring the estimate o ...

7. A magnetic levitation technique for the simultaneous comparison of mass artifacts in air and vacuum.
Published: 4/1/2009
Authors: Patrick J Abbott, Zeina Jabbour Kubarych, Ruimin Liu, Edwin Ross Williams, Joe Chalfoun
Abstract: We describe a mass comparison system in which a test mass artifact in air can be directly compared to a standard mass artifact in vacuum using the same high precision comparator balance. The system uses a magnetic levitation technique to couple the ...

8. Quantitative Measurement of Outgas Products From EUV Photoresists
Published: 3/14/2008
Authors: Charles S Tarrio, Bruce A Benner Jr, Robert Edward Vest, Steven E Grantham, Shannon Bradley Hill, Thomas B Lucatorto, Jay H Hendricks, Patrick J Abbott, Greg Denbeaux, Alin Antohe, Chimaobi Mbanaso, Kevin Orbek
Abstract: The photon-stimulated emission of organic molecules from the photoresist during exposure is a serious problem for extreme- ultraviolet lithography (EUVL) because the adsorption of the outgassing products on the EUV optics can lead to carbonization an ...

9. Magnetic Levitation System for the Dissemination of a Non-Artifact Based Kilogram
Published: 11/27/2007
Authors: Zeina Jabbour Kubarych, Patrick J Abbott, Edwin Ross Williams, Ruimin Liu, Vincent J Lee
Abstract: We describe a new approach to directly link air and vacuum mass measurements. This approach uses magnetic levitation along with vacuum and balance technology to realize vacuum mass measurements. It provides direct traceability to the International Pr ...

10. Anomalous Behavior of Teflon-Based Helium Permeation Flow Standards
Published: 6/1/2007
Authors: Patrick J Abbott, Justin H Chow
Abstract: Helium leak testing is a vital step in assuring product reliability for anything that must be packaged in a sealed container. Examples abound from blister packaging for pharmaceuticals to aluminum wheel rims for automobiles. In order to quantify de ...

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  • SP 250-XX: Calibration Services
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