Work

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

Year: 2020

Type: article

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.

Source: ACTA IMEKO

DOI: 10.21014/acta_imeko.v9i5.987

Authors: I. Silander, C. Forssén, J. Zakrisson, M. Zelan, O. Axner

Institutions: Umeå University, RISE Research Institutes of Sweden

Language: English

Topic: Scientific Measurement and Uncertainty Evaluation

Subfield: Statistics, Probability and Uncertainty

Field: Decision Sciences

Domain: Social Sciences

Open Access status: diamond