B6.4 - A Vertically Positionable Permanent Magnet System for the Planck-Balance
- Event
- SMSI 2023
2023-05-08 - 2023-05-11
Nürnberg - Band
- Lectures
- Chapter
- B6 - Kibble and Planck balances I
- Author(s)
- J. Konrad, J. Kloß, C. Rothleitner - Physikalisch-Technische Bundesanstalt, Braunschweig (Germany), T. Fröhlich - Technische Universität Ilmenau, Ilmenau (Germany)
- Pages
- 131 - 132
- DOI
- 10.5162/SMSI2023/B6.4
- ISBN
- 978-3-9819376-8-8
- Price
- free
Abstract
The Planck-Balance is a compact version of a Kibble balance, allowing a direct measurement of mass by means of electromagnetic force compensation (EMFC). This means that the effects of deformation have to be considered. The vertical position adjustment of the coil, which is discussed in this article, can reduce many errors, such as errors due to deformations during weighing, which lead to a non-proportional correlation between the current in the compensation coil and the compensated mass. In our setup, these errors can be up to about 8 ppm in the maximum case. In addition, there are other problems such as higher order harmonics in the velocity mode, which can be reduced.