THE SWISS WATT BALANCE: FIRST MEASUREMENTS |
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| W. Beer, A. L. Eichenberger, B. Jeanneret, B. Jeckelmann, A. R. Pourzand, P. Richard, H. Schneiter, J. Schwarz |
- Abstract:
- The Swiss Watt Balance is a new type of moving-coil experiment with a very compact design. The aim of the experiment is to link the unit of mass to fundamental constants with a view to a future redefinition of the kilogram. That means to express the kilogram in terms of the meter, the second and the Planck's constant, by equating electrical and mechanical power, with a relative uncertainty of ≤ 10–8. The main features of the Swiss design are a very compact construction and a strict separation between the moving and weighing parts of the experiment. In order to optimize all the key components of the set-up, they were separately tested and accurately characterized. An update on the optical velocity measurement and regulation system, on the permanent magnet and coil assembly assessment, and on the automation of the programmable Josephson voltage standard is given first. In addition, the mass comparator, the characterization of the 100 g gold mass standards, and the absolute gravity measurements are presented. In a second part, the description of a complete sequence of data acquisition is explained in details.
- Download:
- IMEKO-TC3-2001-033.pdf
- DOI:
- -
- Event details
- IMEKO TC:
- TC3
- Event name:
- TC3 Conference 2001
- Title:
17th Conference on Force, Mass and Torque
- Place:
- Istanbul, TURKEY
- Time:
- 17 September 2001 - 21 September 2001