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3. The BNM Watt Balance Project.

Author

Genevès, Gerard, Gournay, Pierre, Gosset, A., Lecollinet, M., Villar, François, Pinot, Patrick, Juncar, P., Clairon, A., Landragin, A., Holleville, D., dos Santos, Franck Pereira, David, J., Besbes, Mondher, Alves, Francisco, Chassagne, Luc, and Topçu, Suat

Subjects
*STANDARDS of mass, *CONFIGURATIONS (Geometry), *MASS (Physics), *PROPERTIES of matter
Abstract

A new watt balance project is now in progress at the Bureau National de Métrologle (BNM), Paris, France. In this paper, the general configuration and the main parts of the experimental setup currently in development are presented. The aim is to contribute to the international effort in monitoring the kilogram toward a new definition of the mass unit with a relative accuracy of 10-8 or better. [ABSTRACT FROM AUTHOR]

Published
2005
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4. Magnetic Circuit Design for the BNM Watt Balance Experiment.

Author

Gournay, Pierre, Genevès, Gerard, Alves, Francisco, Besbes, Mondher, Villar, François, and David, J.

Subjects
*MAGNETIC circuits, *MAGNETOSTRICTION, *ELECTRIC circuits, *GEOMETRY, *TEMPERATURE, *MAGNETISM
Abstract

The Bureau National de Métrologie (BNM) has started since 2001 the development of a watt balance experiment. We first remind the reader the basic principles of that experiment before describing in detail the design of the magnetic circuit which is a principal component of it. Several aspects of the design are described, in particular the circuit geometry, the materials, the influence of magnetostriction, the compensation of the magnet temperature coefficient, and the mounting. [ABSTRACT FROM AUTHOR]

Published
2005
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