Uncertainty in mechanical deformation of a Fabry-Perot cavity due to pressure: towards best mechanical configuration

Authors

  • Sergio Molto Centro Español de Metrología (CEM)
  • María Ana Saenz-Nuño Instituto de Investigación Tecnológica, Escuela Técnica Superior de Ingeniería-ICAI, Universidad Pontificia Comillas
  • Eusebio Bernabeu Universidad Complutense de Madrid
  • María Nieves Medina Formerly Centro Español de Metrología

DOI:

https://doi.org/10.21014/acta_imeko.v11i3.1189

Abstract

In this paper, a study of the deformation of a refractometer use to achieve a quantum realization of the Pascal is made. First, the propagation of the uncertainty in the measure of pressure due to mechanical deformation was made. Then deformation simulations were made with a cavity designed by the CNAM and whose results are reported in the 18SIB04 Quantumpascal EMPIR project. This step aims to corroborate the methodology used in the simulations. The pressure-normalized relative deformation of this design obtained in 18SIB04 is (-6.390 ± 0.015) × 10-12 Pa-1, the result obtained with our method is (-6.384 ± 0.032) × 10-12 Pa-1, which differs 0.001 times from the value obtained in 18SIB04. Finally, a cylindrical cavity design is presented and simulated obtaining a pressure-normalized relative deformation of (-5.758584 ± 0.00000047) × 10-12 Pa-1, which deforms 0.1 times less.

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Published

2022-09-30

Issue

Vol. 11 No. 3 (2022)

Section

Research Papers

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