The paper describes an optical interferometer realized at INRiM, which works as pressure standard based on a well-known phenomenon of light-matter interaction: the dependence of refractive index with pressure (density) of a gas. The realization of a pressure standard via optical method requires a combined approach of high accurate refractive index measurements (sub-nanometer and sub-millikelvin metrology) with ab-initio quantum calculation of molar refractivity, paving the way for a quantum-based standard. The paper reports recent development concerning a new layout of the system, currently focused to improve the temperature measurement and stability. The developed system is a preliminary achievement towards a quantum-based pressure standard in the range between 100 Pa and 150 kPa.

An optical interferometer for pressure measurement / Mari, D; Pisani, M; Zucco, M. - In: JOURNAL OF PHYSICS. CONFERENCE SERIES. - ISSN 1742-6588. - 1065(2018), p. 162007. [10.1088/1742-6596/1065/16/162007]

An optical interferometer for pressure measurement

Mari, D;Pisani, M;Zucco, M
2018

Abstract

The paper describes an optical interferometer realized at INRiM, which works as pressure standard based on a well-known phenomenon of light-matter interaction: the dependence of refractive index with pressure (density) of a gas. The realization of a pressure standard via optical method requires a combined approach of high accurate refractive index measurements (sub-nanometer and sub-millikelvin metrology) with ab-initio quantum calculation of molar refractivity, paving the way for a quantum-based standard. The paper reports recent development concerning a new layout of the system, currently focused to improve the temperature measurement and stability. The developed system is a preliminary achievement towards a quantum-based pressure standard in the range between 100 Pa and 150 kPa.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11696/59658
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