Title :
Absolute determination of the magnetic flux quantum using superconducting magnetic levitation
Author :
Shiota, F. ; Miki, Y. ; Namba, A. ; Nezu, Y. ; Sakamoto, Y. ; Morokuma, T. ; Hara, K.
Author_Institution :
Nat. Res. Lab. of Metrol., Ibaraki, Japan
fDate :
4/1/1995 12:00:00 AM
Abstract :
The current status of our superconducting magnetic levitation experiment for determining the magnetic flux quantum is described. The flux-up system has been improved significantly by using a Josephson voltage standard. Studies are also in progress to improve the mechanical measurement relevant to the floating body with the goal of reducing the uncertainty to less than 1 ppm
Keywords :
constants; magnetic flux; magnetic levitation; measurement errors; Josephson voltage standard; absolute determination; coil current measurement; displacement measurement; floating body; flux-up system; magnetic flux quantum; measurement uncertainty; mechanical measurement; superconducting magnetic levitation; Current measurement; Helium; Josephson junctions; Laboratories; Magnetic flux; Magnetic levitation; Mechanical variables measurement; Superconducting coils; Uncertainty; Voltage;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
