Principles of superconductor imaging surface gradiometry

Magnetic sources in the vicinity of superconducting surfaces produce images in such a way that a single pick-up coil parallel to the surface acts as a first order gradiometer. The principles will be described, together with specific discussions of the imaging by planar and spherical surfaces. The fa...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 1990-08, Vol.165-166, p.89-90
Main Author: van Hulsteyn, D
Format: Article
Language:English
Subjects:
656100 - Condensed Matter Physics- Superconductivity
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
CURRENTS
DIRECT CURRENT
ELECTRIC CHARGES
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
MAGNETIC FIELDS
PHYSICAL PROPERTIES
POINT CHARGE
SUPERCONDUCTING DEVICES
SUPERCONDUCTIVITY
SURFACES
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Description
Summary:Magnetic sources in the vicinity of superconducting surfaces produce images in such a way that a single pick-up coil parallel to the surface acts as a first order gradiometer. The principles will be described, together with specific discussions of the imaging by planar and spherical surfaces. The fact that these surfaces also deflect noise due to remote sources make this concept particularly appealing as a method for detecting extremely weak sources in a hostile environment. Possible applications to neuromagnetometry, corrosion detection and non-destructive evaluation will be discussed. 2 refs., 2 figs.
ISSN:0921-4526
1873-2135
DOI:10.1016/0921-4526(90)90436-X