WFRF:(Silander Isak)
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An invar-based fabry-perot cavity refractometer with a gallium fixed-point cell for assessment of pressure
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- Silander, Isak, 1980- (author)
- Umeå universitet,Institutionen för fysik
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- Forssén, Clayton (author)
- Umeå universitet,Institutionen för fysik
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- Zakrisson, Johan (author)
- Umeå universitet,Institutionen för fysik
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- (creator_code:org_t)
- International Measurement Confederation (IMEKO), 2020
- 2020
- English.
- In: Acta IMEKO. - : International Measurement Confederation (IMEKO). - 0237-028X .- 2221-870X. ; 9:5, s. 293-298
- Journal article (peer-reviewed)
Abstract
Subject headings
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- 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.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Keyword
- Fabry-Perot cavity
- Gallium
- Refractometry
- Temperature
Publication and Content Type
- ref (subject category)
- art (subject category)
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