Rusby, R; De Podesta, M; Williams, J M (2005) Review of methods for a redetermination of the Boltzmann constant. NPL Report. DEPC-TH 006

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Abstract

The Boltzmann constant, k, is the fundamental constant of thermal metrology, which links temperature and thermal quantities with quantities in other branches of physics. As part of a wider move to define the units of the SI in terms of fundamental constants, it is now proposed that the unit of temperature, the kelvin, should be defined not by reference to a particular state of matter, but by specifying the value for the Boltzmann constant. This report reviews methods for the determination of k with high accuracy and considers the options for NPL to carry out such a determination and so contribute to the derivation of the best value. Following this, NPL will be well placed to undertake thermodynamic measurements based on the new definition.

Item Type:	Report/Guide (NPL Report)
NPL Report No.:	DEPC-TH 006
Keywords:	gas thermometer, acoustic thermometer, noise thermometer
Subjects:	Engineering Measurements Engineering Measurements > Thermal
Last Modified:	02 Feb 2018 13:16
URI:	http://eprintspublications.npl.co.uk/id/eprint/3329

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