DocumentCode :
961965
Title :
Limit characteristics of two-junction magnetic flux detector
Author :
Danilov, V.V. ; Likharev, K.K. ; Sniguiriev, O.V. ; Soldatov, E.S.
Author_Institution :
IEEE TMAG
Volume :
13
Issue :
1
fYear :
1977
fDate :
1/1/1977 12:00:00 AM
Firstpage :
240
Lastpage :
241
Abstract :
The sensitivity of a two-Josephson-junction interferometer as a magnetic flux detector (dc SQUID) is estimated. The minimum value of the basic SQUID characteristic-noise equivalent temperature δT = (δΦ)2/kB L appears to be as low as for the best rf SQUID mode: 
. Here 
is an operating temperature, fo is a characteristic frequency of the Josephson junctions and 
is a post-detector bandwidth. For a typical value of SQUID inductance L this limit corresponds to flux sensitivity of the order of 10-7Φo /Hz1/2.
. Here is an operating temperature, f is a post-detector bandwidth. For a typical value of SQUID inductance L this limit corresponds to flux sensitivity of the order of 10-7ΦKeywords :
Josephson device measurement applications; Magnetic measurements; Circuit noise; Differential amplifiers; Frequency; Josephson junctions; Magnetic flux; Noise reduction; Radiofrequency amplifiers; SQUIDs; Temperature; Voltage;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.1977.1059413
Filename :
1059413
Link To Document :
