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The short-term performances of two independent gas modulated refractometers for pressure assessments
RISE Research Institutes of Sweden. Umeå University, Sweden.
Umeå University, Sweden.
Umeå University, Sweden.
Umeå University, Sweden.
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2021 (Engelska)Ingår i: Sensors, E-ISSN 1424-8220, Vol. 21, nr 18, artikel-id 6272Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Refractometry is a powerful technique for pressure assessments that, due to the recent redefinition of the SI system, also offers a new route to realizing the SI unit of pressure, the Pascal. Gas modulation refractometry (GAMOR) is a methodology that has demonstrated an outstanding ability to mitigate the influences of drifts and fluctuations, leading to long-term precision in the 10−7 region. However, its short-term performance, which is of importance for a variety of applications, has not yet been scrutinized. To assess this, we investigated the short-term performance (in terms of precision) of two similar, but independent, dual Fabry–Perot cavity refractometers utilizing the GAMOR methodology. Both systems assessed the same pressure produced by a dead weight piston gauge. That way, their short-term responses were assessed without being compromised by any pressure fluctuations produced by the piston gauge or the gas delivery system. We found that the two refractometer systems have a significantly higher degree of concordance (in the 10−8 range at 1 s) than what either of them has with the piston gauge. This shows that the refractometry systems under scrutiny are capable of assessing rapidly varying pressures (with bandwidths up to 2 Hz) with precision in the 10−8 range. © 2021 by the authors.

Ort, förlag, år, upplaga, sidor
MDPI , 2021. Vol. 21, nr 18, artikel-id 6272
Nyckelord [en]
Fabry–Perot cavity, Gas modulation, Metrology, Modulation techniques, Pressure, Refractometry, Short-term performance, Gages, Pistons, Dead weights, Gas delivery system, Piston gauges, Pressure fluctuation, Short term, Refractometers
Nationell ämneskategori
Annan elektroteknik och elektronik
Identifikatorer
URN: urn:nbn:se:ri:diva-56688DOI: 10.3390/s21186272Scopus ID: 2-s2.0-85115079918OAI: oai:DiVA.org:ri-56688DiVA, id: diva2:1604053
Anmärkning

Funding details: 2017-05013, 2018-04570, 2019-05029; Funding details: Horizon 2020 Framework Programme, H2020, 621-2015-04374, 621-2020-05105; Funding details: European Metrology Programme for Innovation and Research, EMPIR; Funding details: Kempestiftelserna, 1823, U12; Funding text 1: This project (QuantumPascal, 18SIB04) has received funding from the EMPIR programme co-financed by the Participating States and from the European Union?s Horizon 2020 research and innovation programme; Vetenskapsr?det (VR) (621-2015-04374 and 621-2020-05105); the Ume?University Industrial doctoral school (IDS-18); the Vinnova Metrology Programme (2017-05013, 2018-04570, and 2019-05029); the Kempe Foundations (1823.U12).

Tillgänglig från: 2021-10-18 Skapad: 2021-10-18 Senast uppdaterad: 2023-05-25Bibliografiskt granskad

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Zelan, Martin

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