Experimental determination of molar polarizability of nitrogen by a multi-reflection inteferometric technique |
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| D. Mari, S. Pasqualin, M. Zucco |
- Abstract:
- A novel optical pressure standard, based on a multi-reflection interferometric technique, has been recently developed. It is based on the measurement of the refractive index of a gas through an unbalanced homodyne interferometer (UINT) and is able to measure pressure with a relative standard uncertainty of 10 ppm at 100 kPa [1]. In this work, the interferometer was used to measure the molar polarizability of nitrogen, which resulted in agreement with recent previous determinations, paving the way for using photonic pressure standards as accurate and fast transfer standards of the pascal.
- Keywords:
- molar polarizability; nitrogen; laser interferometry; optical pressure standard
- Download:
- IMEKO-TC16-2023-05.pdf
- DOI:
- 10.21014/tc16-2023.05
- Event details
- IMEKO TC:
- TC16
- Event name:
- TC16 Conference 2023
- Title:
7th Conference on Pressure and Vacuum Measurement (together with the CCM - the Consultative Committee for Mass and Related Quantities of the BIPM)
- Place:
- Washington DC, UNITED STATES
- Time:
- 15 May 2023 - 19 May 2023