THERMODYNAMIC EFFECTS IN A GAS MODULATED INVAR-BASED DUAL FABRY-PÉROT CAVITY REFRACTOMETER ADDRESSING 100 KPA OF NITROGEN |
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| T. Rubin, I. Silander, J. Zakrisson, M. Hao, C. Forssén, P. Asbahr, M. Bernien, A. Kussicke, K. Liu, M. Zelan, O. Axner |
- Abstract:
- An Invar-based dual Fabry-Pérot cavity refractometer used for assessments of pressure by the gas modulation refractometry (GAMOR) methodology has been scrutinized with respect to the influence of thermodynamic effects (pV-work) that originates from the gas exchange process when 100 kPa of nitrogen is addressed. It is shown that the actual temperature variation of the cavity spacer solely is a fraction of the previously assessed upper limits (0.5 mK/100 kPa), limited to sub-parts-per-million (ppm) levels. This finding additionally supports the conclusion that the thermodynamic effects will not be a limiting factor when the system is used for assessments of pressure.
- Keywords:
- pressure; pV-work; refractometry; gas modulation; Fabry-Perot cavity
- Download:
- IMEKO-TC16-2022-117.pdf
- DOI:
- 10.21014/tc16-2022.117
- Event details
- IMEKO TC:
- TC16
- Event name:
- TC16 Conference 2022
- Title:
6th Conference on Pressure and Vacuum Measurement (together with the 24th TC3 Conference on the Measurement of Force, Mass and Torque, the 14th TC5 Conference on the Measurement of Hardness, and the 5th TC22 Conference on Vibration Measurement)
- Place:
- Cavtat-Dubrovnik, CROATIA
- Time:
- 11 October 2022 - 13 October 2022