DocumentCode
236298
Title
Construction and performance of the NIST-4 magnet system
Author
Seifert, Frank ; Panna, Alireza ; Li, Sinan ; Han, Bo ; Chao, Leon S. ; Cao, Austin ; Haddad, Darine ; Choi, Hyo-Sang ; Haley, Lori ; Schlamminger, Stephan ; Pratt, Jon R.
Author_Institution
Joint Quantum Inst., Univ. of Maryland, Gaithersburg, MD, USA
fYear
2014
fDate
24-29 Aug. 2014
Firstpage
370
Lastpage
371
Abstract
A watt balance is a promising instrument to realize the unit of mass at the kilogram level. The magnet system is one of the key elements of such an instrument. For the new watt balance currently under construction at the National Institute of Standards and Technology, a permanent magnet system was chosen. We describe the construction of the magnet system, first measurements of the field profile, and techniques that were used to achieve an ideal field profile.
Keywords
balances; mass measurement; permanent magnets; NIST-4 magnet system; field profile; mass unit; permanent magnet system; watt balance; Coils; Iron; Magnetic noise; Magnetic separation; Magnetic shielding; NIST; Superconducting magnets; Planck constant; mass; mass metrology; permanent magnet; watt balance;
fLanguage
English
Publisher
ieee
Conference_Titel
Precision Electromagnetic Measurements (CPEM 2014), 2014 Conference on
Conference_Location
Rio de Janeiro
ISSN
0589-1485
Print_ISBN
978-1-4799-5205-2
Type
conf
DOI
10.1109/CPEM.2014.6898413
Filename
6898413
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