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Progress in relating the kilogram to Planck's constant with the NPL watt balance.

Robinson, I A; Kibble, B P (2002) Progress in relating the kilogram to Planck's constant with the NPL watt balance. In: 2002 Conference on Precision Electromagnetic Measurements (CPEM), 16-21 June 2002, Ottawa, Canada.

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Abstract

The NPL moving-coil Watt balance has been operated regularly for the last two years. The result exhibits good short-term noise and stability but show two significant drifts over periods of 1 to 4 months. The long-term nature of the drifts has hindered the search for their cause which is now thought to be due to interacting mechanical distortions which alter the alignment of the apparatus after evacuation. Modifications are in hand to eliminate the effects of these distortions.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Keywords: Watt balance, kilogram, Planck's constant
Subjects: Electromagnetics
Electromagnetics > Electrical Quantum Standards
Last Modified: 02 Feb 2018 13:17
URI: http://eprintspublications.npl.co.uk/id/eprint/2728

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