Electricity: measuring and testing – Magnetic – Susceptibility
Patent
1991-05-17
1995-04-18
Snow, Walter E.
Electricity: measuring and testing
Magnetic
Susceptibility
324226, G01N 2776, G01R 3316
Patent
active
054081785
ABSTRACT:
The surface or internal structure of diamagnetic and paramagnetic materials is imaged by measuring, preferably with a superconducting quantum interference device (SQUID) magnetometer, perturbations to an applied magnetic field resulting from variations in magnetic susceptibility at an array of locations across the object. The array of perturbation measurements is processed to generate a map of local susceptiblities. For implementation of susceptibility tomography, multiple arrays of perturbation signals for a plurality of relative orientations between the object, the field, and the measurement locations are processed to generate values for local susceptibility at selected sites within the object, such as along a selected sectional plane.
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Lauder Alan
Wikswo, Jr. John P.
E.I. Du Pont de Nemours and Company
Snow Walter E.
Vanderbilt University
Westerhoff Richard V.
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