Progress on vacuum-to-air mass calibration system using magnetic suspension to disseminate the Planck-constant realized kilogram

Authors

  • Eric Carl Benck National Institute of Standards and Technology
  • Corey Stambaugh National Institute of Standards and Technology
  • Edward Mulhern National Institute of Standards and Technology
  • Patrick Abbott National Institute of Standards and Technology
  • Zeina Kubarych National Institute of Standards and Technology

DOI:

https://doi.org/10.21014/acta_imeko.v6i2.406

Abstract

The kilogram is the unit of mass in the International System of units (SI) and has been defined as the mass of the International Prototype Kilogram (IPK) since 1889.  In the future, a new definition of the kilogram will be realized by fixing the value of the Planck constant.  The new definition of the unit of mass will occur in a vacuum environment by necessity, so the National Institute of Standards and Technology (NIST) is developing a mass calibration system in which a kilogram artefact in air can be directly compared with a kilogram realized in a vacuum environment.  This apparatus uses magnetic suspension to couple the kilogram in air to a high accuracy mass balance in vacuum. 

 

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Published

2017-07-21

Issue

Vol. 6 No. 2 (2017)

Section

Research Papers

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