Rayleigh scattering for pressure assessment

Mari, D.; Pisani, Marco; Francese, Claudio

doi:10.1016/j.measen.2021.100253

Cited by 4 publications

(4 citation statements)

References 25 publications

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“…The UINT recently demonstrated an ability of assessing barometric pressure with an uncertainty of 10 ppm, improved by an order of magnitude as compared to previous achievements [23], [24], [25]. The UINT pressure standard has been also compared to a reference pressure standard, a barometer, in the 70-100 kPa range: the show a relative difference of ± 20 ppm for N2, fully covered by the related uncertainties.…”

Section: Wp2: Alternative Non Fabry-pérot Basedmentioning

confidence: 99%

“…A custom software, written in Python, has been developed to analyse the acquired images from the camera detector, with the dual purpose of detecting and correcting effects caused by eventual spurious scattering centres and calculating the intensity of scattered light. The realized software and the design of the RAY system were presented in [23].…”

Section: Wp2: Alternative Non Fabry-pérot Basedmentioning

confidence: 99%

See 1 more Smart Citation

‘Quantum-Based Realizations of the Pascal’: Status and Progress of the Empir-Project: Quantumpascal

Rubin¹,

Silander²,

Forssén³

et al. 2023

Proceedings of the 6th IMEKO TC16 Conference on Pressure and Vacuum Measurement

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Section: Wp2: Alternative Non Fabry-pérot Basedmentioning

confidence: 99%

Section: Wp2: Alternative Non Fabry-pérot Basedmentioning

confidence: 99%

‘Quantum-Based Realizations of the Pascal’: Status and Progress of the Empir-Project: Quantumpascal

Rubin¹,

Silander²,

Forssén³

et al. 2023

Proceedings of the 6th IMEKO TC16 Conference on Pressure and Vacuum Measurement

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“…In the new SI, the uncertainty of the Boltzmann constant kB was eliminated, making advantageous to realise the pascal through number density measurements via optical methods, resulting in significant progress achieved in recent years at various metrological institutes and universities all around the world [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. In this contest, a novel optical pressure standard, named UINT and alternative to Fabry-Perot cavity-based realizations, has recently developed [1].…”

Section: Introductionmentioning

confidence: 99%

Experimental determination of molar polarizability of nitrogen by a multi-reflection inteferometric technique

Mari,

Pasqualin,

Zucco

2024

Proceedings of the 7th IMEKO TC16 Conference on Pressure and Vacuum Measurement

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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.

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“…A possible means to remedy such shortcomings is to employ quantum-based instrumentation that does not rely on any moving parts, and instead assesses pressure by utilizing knowledge of some fundamental properties of the gas [ 6 ]. Such instrumentation has over the last few decades experienced a significant development [ 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ]. The interest in this type of techniques was further enhanced by the 2019 redefinition of the SI, in which the Boltzmann constant received an exact value [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

Demonstration of a Transportable Fabry–Pérot Refractometer by a Ring-Type Comparison of Dead-Weight Pressure Balances at Four European National Metrology Institutes

Forssén,

Silander,

Zakrisson

et al. 2023

Sensors

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Fabry–Pérot-based refractometry has demonstrated the ability to assess gas pressure with high accuracy and has been prophesized to be able to realize the SI unit for pressure, the pascal, based on quantum calculations of the molar polarizabilities of gases. So far, the technology has mostly been limited to well-controlled laboratories. However, recently, an easy-to-use transportable refractometer has been constructed. Although its performance has previously been assessed under well-controlled laboratory conditions, to assess its ability to serve as an actually transportable system, a ring-type comparison addressing various well-characterized pressure balances in the 10–90 kPa range at several European national metrology institutes is presented in this work. It was found that the transportable refractometer is capable of being transported and swiftly set up to be operational with retained performance in a variety of environments. The system could also verify that the pressure balances used within the ring-type comparison agree with each other. These results constitute an important step toward broadening the application areas of FP-based refractometry technology and bringing it within reach of various types of stakeholders, not least within industry.

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Rayleigh scattering for pressure assessment

Cited by 4 publications

References 25 publications

‘Quantum-Based Realizations of the Pascal’: Status and Progress of the Empir-Project: Quantumpascal

‘Quantum-Based Realizations of the Pascal’: Status and Progress of the Empir-Project: Quantumpascal

Experimental determination of molar polarizability of nitrogen by a multi-reflection inteferometric technique

Demonstration of a Transportable Fabry–Pérot Refractometer by a Ring-Type Comparison of Dead-Weight Pressure Balances at Four European National Metrology Institutes

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