DocumentCode :
955029
Title :
Cryogenic direct current comparators and their applications
Author :
Dziuba, R.F. ; Sullivan, D.B.
Author_Institution :
National Bureau of Standards, Washington, D.C.
Volume :
11
Issue :
2
fYear :
1975
fDate :
3/1/1975 12:00:00 AM
Firstpage :
716
Lastpage :
719
Abstract :
Cryogenic direct current comparators, utilizing superconducting shields and Superconducting Quantum Interference Devices (SQUIDs), provide current ratios of up to 100/1 or higher with accuracies of 
and current resolutions of 
A. Two types of comparators differing in the shielding arrangement of the ratio windings are described. One type consists of unit windings inside a seamless Pb tube; the other consists of multi-turn ratio windings within an overlapping toroidal superconducting shield. For both shielding configurations, SQUIDs serve as flux sensors for the comparators. The application of these comparators to the measurment of resistance ratios is described.
and current resolutions of A. Two types of comparators differing in the shielding arrangement of the ratio windings are described. One type consists of unit windings inside a seamless Pb tube; the other consists of multi-turn ratio windings within an overlapping toroidal superconducting shield. For both shielding configurations, SQUIDs serve as flux sensors for the comparators. The application of these comparators to the measurment of resistance ratios is described.Keywords :
Current comparators; Magnetometers, superconducting; Resistance measurements; Superconducting devices; Cryogenics; Detectors; Electric resistance; Electrical resistance measurement; Magnetic flux; Magnetic shielding; SQUIDs; Superconducting magnets; Temperature sensors; Toroidal magnetic fields;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.1975.1058699
Filename :
1058699
Link To Document :
