Egan, P.
, Stone Jr., J.
, Ricker, J.
and Hendricks, J.
(2016),
Laser Refractometer as a Transfer Standard of the Pascal, CPEM 2016 Digest, Ottawa, CA, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=920182
(Accessed November 21, 2024)
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Laser Refractometer as a Transfer Standard of the Pascal
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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, CA
Conference Title
Conference on Precision Electromagnetic Measurements (CPEM) 2016
Pub Type
Conferences
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Created July 9, 2016, Updated April 1, 2022