| Zugriffsnummer | 40747 |
| Dokumenttyp | Konferenzartikel |
| Peer Review | unbekannt |
| Sprache | Englisch |
| Titel | Development of a specialized hydrostatic comparator for the accurate density determination of natural silicon spheres: a novel method for a primary realization of the unit kilogram |
| Autor(in); Institution |
Wegge, Robin; 1.8, Masse - Darstellung der Einheit, PTB-Braunschweig
Bettin, Horst; 1.8, Masse - Darstellung der Einheit, PTB-Braunschweig
|
| Quelle/Jahr | 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018), Full Digest:(2018), 627 - 628 |
| ISSN | 2160-0171 (ELECTRONIC) ; 0589-1485 (POD) |
| ISBN | 978-1-5386-0974-3 ; 978-1-5386-0973-6 (USB) |
| DOI | |
| Verlag | Piscataway, NJ: IEEE |
| Konferenzangaben | Conference on Precision Electromagnetic Measurements - CPEM 2018, Paris, 08-13, July, 2018, France |
| Freie Schlagworte | Avogadro constant ; dissermination ; hydrostatic weighing ; kilogram ; magnetic suspension coupling ; Planck constant ; silicon spheres |
| Zusammenfassung | A novel method for a primary realization of the soon-to-be redefined unit of mass, kilogram, is presented. The new approach will accurately relate the Planck constant to spheres manufactured from natural silicon. Therefore, the precisely known isotopical composition of a Si sphere will be transferred to a sphere made of natural silicon with a relative uncertainty of 3 × 10-8. To achieve this ambitious objective, the concept of a newly developed hydrostatic comparator, which combines the well-known Archimedes principle with a magnetic suspension coupling, is discussed. This combination allows to improve the major uncertainty contribution of this type of instrument - the temperature stability. |
Zitierung
Wegge, R. & Bettin, H. (2018). Development of a specialized hydrostatic comparator for the accurate density determination of natural silicon spheres: a novel method for a primary realization of the unit kilogram. Conference on Precision Electromagnetic Measurements - CPEM 2018, Paris, 08-13, July, 2018, France. https://doi.org/10.1109/cpem.2018.8501184