DocumentCode :
955011
Title :
A reliable DC squid made with tunnel junctions
Author :
Clarke, John ; Goubau, Wolfgang M. ; Ketchen, Mark B.
Author_Institution :
Univ. of Calif., Berkeley
Volume :
11
Issue :
2
fYear :
1975
fDate :
3/1/1975 12:00:00 AM
Firstpage :
724
Lastpage :
727
Abstract :
D.C. SQUIDS of cylindrical geometry have been fabricated using Nb-NbOx -Pb tunnel junctions. The SQUIDs can be thermally cycled repeatedly and cooled in the earth\´s magnetic field without significant loss of performance. Flux resolution of 
above a frequency of 1 Hz has been achieved through optimization of electronic circuitry and careful shielding. Fluctuations and drift in the temperature of the helium bath are found to be the major source of long-term SQUID noise. With a simple temperature stabilizer, drift has been reduced to less than 
/hr over a three hour period.
above a frequency of 1 Hz has been achieved through optimization of electronic circuitry and careful shielding. Fluctuations and drift in the temperature of the helium bath are found to be the major source of long-term SQUID noise. With a simple temperature stabilizer, drift has been reduced to less than /hr over a three hour period.Keywords :
Magnetometers, superconducting; Circuits; Earth; Fluctuations; Frequency; Geometry; Helium; Magnetic shielding; Performance loss; SQUIDs; Temperature;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.1975.1058697
Filename :
1058697
Link To Document :
