TITLE

Unlocked detection of SQUID signals: Theory and design

AUTHOR(S)
Dubuc, C.; Benhida, K.; Bloyet, D.
PUB. DATE
May 1991
SOURCE
Review of Scientific Instruments;May91, Vol. 62 Issue 5, p1333
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We describe the principle and implementation of a new unlocked processing of SQUID signals. A digital interpolation is achieved by using the periodicity of the voltage-flux transfer characteristic. The method is analyzed and the choice of the main parameters is discussed. A practical implementation under CPU control with its self-calibrating procedure is described and the main performances are reported. The magnetometer particularly exhibits an improved ruggedness against some forms of spurious noise as compared to standard servomagnetometers. This method can be easily extended to optical interferometry. The use of this detection scheme is suggested as an example for Mach–Zehnder interferometers.
ACCESSION #
9785687

 

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