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Thermodynamic effec...
Thermodynamic effects in a gas modulated Invar-based dual Fabry-Pérot cavity refractometer
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- Rubin, T. (författare)
- Physikalisch-Technische Bundesanstalt (PTB), Berlin, Germany
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- Silander, Isak, 1980- (författare)
- Umeå universitet,Institutionen för fysik,Umeå University, Sweden
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- Zakrisson, Johan (författare)
- Umeå universitet,Institutionen för fysik,Umeå University, Sweden
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- Hao, M. (författare)
- School of Mechanical Engineering and Automation, Northeastern University, Shenyang, China
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- Forssén, Clayton (författare)
- Umeå universitet,RISE,Umeå University, Sweden,Institutionen för fysik,Measurement Science and Technology, RISE Research Institutes of Sweden, Borås, Sweden
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- Asbahr, P. (författare)
- Physikalisch-Technische Bundesanstalt (PTB), Berlin, Germany
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- Bernien, M. (författare)
- Physikalisch-Technische Bundesanstalt (PTB), Berlin, Germany
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- Kussicke, A. (författare)
- Physikalisch-Technische Bundesanstalt (PTB), Berlin, Germany
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- Liu, K. (författare)
- School of Mechanical Engineering and Automation, Northeastern University, Shenyang, China
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- Zelan, Martin (författare)
- RISE,Mätteknik,Measurement Science and Technology, RISE Research Institutes of Sweden, Borås, Sweden
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- Axner, Ove (författare)
- Umeå universitet,Institutionen för fysik,Umeå University, Sweden
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(creator_code:org_t)
- 2022-04-14
- 2022
- Engelska.
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Ingår i: Metrologia. - : IOP Publishing Ltd. - 0026-1394 .- 1681-7575. ; 59:3
- Relaterad länk:
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https://doi.org/10.1...
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https://umu.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- By measuring the refractivity and the temperature of a gas, its pressure can be assessed from fundamental principles. The highest performing instruments are based on Fabry-Perot cavities (FPC). Gas modulation refractometry (GAMOR) is a methodology that has the ability to reduce the influence of disturbances to such an extent that high-precision (sub-parts-per-million) assessments of pressure can be made by the use of FPCs of Invar. To allow for high accuracy assessments, it is of importance to assess the uncertainty contribution from the thermodynamic effects that are associated with the gas filling and emptying of the cavity (pV-work). This paper presents a detailed scrutiny of the influence of the gas exchange process on the assessment of gas temperature on an Invar-based dual-FPC (DFPC) instrumentation. It is shown that by virtue of a combination of a number of carefully selected design entities (a small cavity volume with a bore radius of 3 mm, a spacer material with high heat capacitance, large thermal conductivity, and no regions that are connected with low thermal conductance, i.e. no heat islands, and a continuous assessment of temperature of the cavity spacer) the system is not significantly affected by pV-work. Simulations show that 10 s after the filling all temperature gradients in the system are well into the sub-mK range. Experiments support that refractivity assessments initiated after 40 s are not significantly affected by the pV-work. The analysis given in this work indicates that an upper limit for the influence of pV-work on the Invar-based DFPC system using 100 s long gas modulation cycles is 0.5 mK/100 kPa (or 1.8 ppm/100 kPa). Consequently, thermodynamic effects will not be a limiting factor when the Invar-based DFPC GAMOR system is used for assessments of pressure or as a primary pressure standard up to atmospheric pressures.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Annan elektroteknik och elektronik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Other Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)
Nyckelord
- Gamor
- Gas refractometry
- Invar-based
- Optical pressure standard
- Pv-work
- Quantumpascal
- Atmospheric pressure
- Cavity resonators
- Fabry-Perot interferometers
- Modulation
- Refraction
- Refractive index
- Temperature
- Thermal conductivity
- Uncertainty analysis
- Optical pressure
- Pressure standards
- Refractometry
- Thermodynamic effect
- Gases
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas
- Av författaren/redakt...
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Rubin, T.
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Silander, Isak, ...
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Zakrisson, Johan
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Hao, M.
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Forssén, Clayton
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Asbahr, P.
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visa fler...
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Bernien, M.
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Kussicke, A.
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Liu, K.
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Zelan, Martin
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Axner, Ove
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visa färre...
- Om ämnet
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- NATURVETENSKAP
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NATURVETENSKAP
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och Fysik
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- TEKNIK OCH TEKNOLOGIER
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TEKNIK OCH TEKNO ...
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och Elektroteknik oc ...
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och Annan elektrotek ...
- Artiklar i publikationen
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Metrologia
- Av lärosätet
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RISE
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Umeå universitet