Title :
High-precision measurement of 2e/hthat uses cryogenic electronic components
Author :
Gallop, J.C. ; Petley, B.W.
Author_Institution :
National Physical Laboratory, Division of Quantum Metrology, Teddington, UK
Abstract :
A new determination of 2e/h is described, in which not only the Josephson junction but also the current-null detector and 100:1 ratio voltage divider are operated at 4.2 K. The results obtained with this new system are compared with previous data obtained with room-temperature components, and the agreement is found to be 0.02 (±0.05) parts in 106.
Keywords :
Josephson junctions; constants; cryogenics; measurement systems; Josephson junction; constants; cryogenics; current null detector; high precision measurement; voltage divider;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19730359
