DocumentCode
3444269
Title
Progress on the NPL Watt Balance: Alignment and Measurements
Author
Robinson, Ian A. ; Kibble, Bryan P.
Author_Institution
National Phys. Lab.
fYear
2004
fDate
38139
Firstpage
54
Lastpage
55
Abstract
After modifications to the balance support structure, the apparatus was run for a short time in July 2003 and showed agreement with the data presented at CPEM 2002 within existing alignment limitations. The balance is presently being modified to allow accurate alignment of the coil in vacuum and further measurements are carried out in 2004 with the aim of determining the alignment uncertainties and producing a value for Planck´s constant
Keywords
constants; measurement standards; measurement uncertainty; NPL watt balance; Planck´s constant; alignment uncertainties; balance support structure; Coils; Current measurement; Density measurement; Electrical resistance measurement; Force measurement; Laser beams; Mirrors; Position measurement; Velocity measurement; Voltage;
fLanguage
English
Publisher
ieee
Conference_Titel
Precision Electromagnetic Measurements Digest, 2004 Conference on
Conference_Location
London
Print_ISBN
0-7803-8494-6
Electronic_ISBN
0-7803-8494-6
Type
conf
DOI
10.1109/CPEM.2004.305417
Filename
4097111
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