An invar-based fabry-perot cavity refractometer with a gallium fixed-point cell for assessment of pressure

Authors

  • I. Silander Department of Physics Umea University SE-901 87 Umea
  • C. Forssén Department of Physics Umea University SE-901 87 Umea and Measurement Technology RISE Research Institutes of Sweden SE-501 15 Boras
  • J. Zakrisson Department of Physics Umea University SE-901 87 Umea
  • M. Zelan Measurement Technology RISE Research Institutes of Sweden SE-501 15 Boras
  • O. Axner Department of Physics Umea University SE-901 87 Umea

DOI:

https://doi.org/10.21014/acta_imeko.v9i5.987

Abstract

An Invar-based Fabry-Perot cavity refractometer equipped with an automated, miniaturized gallium fixed-point cell for assessment of pressure is presented. The use of an Invar cavity spacer has previously demonstrated pressure assessments with sub-0.1 ppm precision. The fixed-point cell, whose design and implementation are presented here, provides a reference for temperature assessment of the gas inside the cavity with an uncertainty of 4 ppm. This opens up for a self-contained system for realization of the Pascal with an accuracy in the low ppm range. This is an important step towards disseminating the Pascal through fundamental principles.

Downloads

Published

2020-12-31

Issue

Vol. 9 No. 5 (2020): Special issue for TC3, TC5, TC16 and TC22

Section

Conference Submissions

License

Authors who publish with this journal agree to the following terms:

  • Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
  • Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
  • Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).