Measurements of the magnetic flux quantum, Planck constant, and elementary charge at VNIIM

Author

Frantsuz, E.T. ; Gorchakov, Yu D. ; Khavinson, V.M.

Author_Institution

D.I. Mendeleyev Res. Inst. of Metrol., St. Petersburg, USSR

Volume

41

Issue

4

fYear

1992

fDate

8/1/1992 12:00:00 AM

Firstpage

482

Lastpage

485

Abstract

Tests of an electromechanical system developed for measurements of the magnetic flux quantum, Planck´s constant, and the elementary charge in SI units by a procedure based on a superconducting levitated mass have shown a precision of several parts in 10⁶. When a special cryogenic measuring device is introduced into the system, the precision will increase to several parts in 10⁷. Further improvements in the measuring setup should result in an uncertainty below 1 part in 10⁷

Keywords

Meissner effect; SQUIDs; constants; magnetic flux; magnetic levitation; magnetic variables measurement; units (measurement); Planck constant; SI units; VNIIM; ampere; cryogenic measuring device; electromechanical system; elementary charge; magnetic flux quantum; measurement uncertainty; superconducting levitated mass; Charge measurement; Current measurement; Electric variables measurement; Electromechanical systems; Force measurement; Magnetic field measurement; Magnetic flux; Magnetic levitation; Mechanical variables measurement; Superconducting coils;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.155911

Filename

155911