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Laser Refractometer as a Transfer Standard of the Pascal

Published

Author(s)

Patrick F. Egan, Jack A. Stone Jr., Jacob E. Ricker, Jay H. Hendricks

Abstract

We have developed a new low pressure sensor which is based on the measurement of (nitrogen) gas refractivity inside a Fabry-Perot (FP) cavity. We compare pressure determinations via this laser refractometer to that of well-established ultrasonic manometers throughout the range 100} Pa to 100,000 Pa. The refractometer demonstrates 10^{-6} precision for p > 50 kPa;---as good or better than the manometer---we argue that a laser refractometer represents a state-of-the-art transfer standard of the pascal. We also claim the refractometer has an accuracy of U(p_FP) = [ (16 mPa)^2 + (11.9 x 10^{-6} * p)^2]^1⁄2, as realized through the properties of nitrogen gas.
Proceedings Title
CPEM 2016 Digest
Conference Dates
July 10-15, 2016
Conference Location
Ottawa
Conference Title
Conference on Precision Electromagnetic Measurements (CPEM) 2016

Citation

Egan, P. , Stone, J. , Ricker, J. and Hendricks, J. (2016), Laser Refractometer as a Transfer Standard of the Pascal, CPEM 2016 Digest, Ottawa, -1, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=920182 (Accessed December 1, 2021)
Created July 10, 2016, Updated February 19, 2017