DocumentCode
1549200
Title
The ratio error of the overlapped-tube cryogenic current comparator
Author
Seppa, Heikki
Author_Institution
Metrol. Res. Inst., Tech. Res. Centre of Finland, Espoo, Finland
Volume
39
Issue
5
fYear
1990
fDate
10/1/1990 12:00:00 AM
Firstpage
689
Lastpage
697
Abstract
Analytic expressions for the ratio uncertainty of the overlapped-tube cryogenic current comparator are derived for dimensioning the overlapped-tube comparator. Theoretical predictions agree reasonably well with experimental observations by H. Ramin (Arch. Elektrotech., vol.58, p.53, 1976). The construction of a very sensitive cryogenic current comparator and the possibility of minimizing the ratio uncertainty by reducing the size of the detection coil are also discussed
Keywords
SQUIDs; electric current measurement; electric resistance measurement; low-temperature techniques; SQUID magnetometer; dimensioning; electric current measurement; overlapped-tube cryogenic current comparator; ratio error; Cryogenics; Detectors; High temperature superconductors; Magnetic shielding; Resistors; SQUID magnetometers; Superconducting cables; Superconducting coils; Temperature sensors; Uncertainty;
fLanguage
English
Journal_Title
Instrumentation and Measurement, IEEE Transactions on
Publisher
ieee
ISSN
0018-9456
Type
jour
DOI
10.1109/19.58609
Filename
58609
Link To Document