Title :
Development of an electromagnetic microscope using HTS SQUIDs
Author_Institution :
SQM Technol. Inc., La Jolla, CA, USA
fDate :
6/1/1999 12:00:00 AM
Abstract :
Superconductive quantum interference devices (SQUIDS) offer new technology for eddy current evaluation of materials. Their high resolution at low frequencies enables arrays of small pickup loops that can give images of millimeter fatigue cracks, corrosion, and inclusions deep inside materials and structures, nondestructively. High temperature superconductors can bring the arrays into common use. They enable packaging them in a hand-held, refrigerated instrument, without cryogenic encumbrances. The instrument would be a hand held, electromagnetic microscope for eddy current evaluation of materials.
Keywords :
SQUIDs; eddy current testing; electromagnetic devices; high-temperature superconductors; microscopes; HTS SQUID; corrosion; eddy current testing; electromagnetic microscope; fatigue crack; hand-held instrument; high temperature superconductor; inclusion; nondestructive evaluation; pickup loop array; Eddy currents; Frequency; High temperature superconductors; Image resolution; Instruments; Interference; Microscopy; SQUIDs; Superconducting materials; Superconductivity;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
