TITLE

A stabilizer for superconducting quantum interference device gradiometers for operation in lightly shielded environments

AUTHOR(S)
Yokosawa, Koichi; Kandori, Akihiko; Miyashita, Tsuyoshi; Suzuki, Daisuke; Tsukada, Keiji; Tsukamoto, Akira
PUB. DATE
May 2003
SOURCE
Applied Physics Letters;5/5/2003, Vol. 82 Issue 18, p3059
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A stabilizer for superconducting quantum interference device (SQUID) magnetometers operating in lightly shielded environments is proposed. When the stabilizer is applied in an electrical gradiometer, which operates by obtaining differences between the outputs of the two SQUID magnetometers, the intrinsic noise of the stabilizer can be neglected. The operation of an electrical gradiometer where the SQUID magnetometers are of the high-critical-temperature (high-T[sub c]) type is shown to be substantially more stable in a lightly magnetically shielding cylinder with the addition of the stabilizer function. Very clear magnetocardiograms were obtained by a gradiometer of this type.
ACCESSION #
9630219

 

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