Upgrading the NIST electronic kilogram system

Author

Steiner, R. ; Haddad, D. ; Liu, R. ; Perl, E.

Author_Institution

Nat. Inst. of Stand. & Technol. (NIST), Gaithersburg, MD, USA

fYear

2010

fDate

13-18 June 2010

Firstpage

32

Lastpage

33

Abstract

The electronic kilogram project at the National Institute of Standards and Technology is upgrading several major subsystems to improve the operational reliability of the watt balance system and lower the uncertainty of results for the Planck constant, h. These include a picosecond time interval analyzer, piezo motor coil tilt control, lock-in AC signal coil transverse-position detection, fiber-optic standard frequency distribution, and a dry vacuum pumping system.

Keywords

balances; coils; constants; mass measurement; measurement uncertainty; units (measurement); vacuum pumps; NIST; National Institute of Standards and Technology; Planck constant; dry vacuum pumping system; electronic kilogram system; fiber-optic standard frequency distribution; lock-in AC signal coil transverse-position detection; measurement uncertainty; operational reliability; picosecond time interval analyzer; piezomotor coil tilt control; watt balance system; Coils; Control systems; Equations; Instruments; Magnetic fields; NIST; Steel; System testing; Vacuum systems; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Precision Electromagnetic Measurements (CPEM), 2010 Conference on

Conference_Location

Daejeon

Print_ISBN

978-1-4244-6795-2

Type

conf

DOI

10.1109/CPEM.2010.5543359

Filename

5543359