Nondestructive evaluation of flaws using SQUIDs

Citation
Jt. Jeng et al., Nondestructive evaluation of flaws using SQUIDs, PHYSICA C, 341, 2000, pp. 2637-2638
Citations number
4
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA C
ISSN journal
0921-4534 → ACNP
Volume
341
Year of publication
2000
Part
4
Pages
2637 - 2638
Database
ISI
SICI code
0921-4534(200011)341:<2637:NEOFUS>2.0.ZU;2-9
Abstract
Using high-T-c SQUIDs, we have designed a nondestructive evaluation system to probe buried flaws. The frequency of the excitation magnetic fields was varied from 10 to 800 Hz and the magnetic fields generated from the eddy cu rrent was lock-in detected. The SQUIDs output data revealed the most effect ive excitation frequencies for the flaws with different depths and widths. The signal-to-noise ratio of the deep flaws can be further enhanced either by using higher excitation fields or using the SQUIDs with higher low-frequ ency sensitivity.