INTEGRATED NIOBIUM DC SQUID GRADIOMETERS FOR NONDESTRUCTIVE EVALUATION AND BIOMAGNETISM

Authors
PEGRUM CM WALKER ME LANG G SHAHANI U PEDERSEN JR NAKANE H
Citation
Cm. Pegrum et al., INTEGRATED NIOBIUM DC SQUID GRADIOMETERS FOR NONDESTRUCTIVE EVALUATION AND BIOMAGNETISM, Journal of low temperature physics, 106(3-4), 1997, pp. 493-502
Citations number
16
Categorie Soggetti
Physics, Applied
Journal title
Journal of low temperature physics → ACNP
ISSN journal
00222291
Volume
106
Issue
3-4
Year of publication
1997
Pages
493 - 502
Database
ISI
SICI code
0022-2291(1997)106:3-4<493:INDSGF>2.0.ZU;2-#
Abstract
We describe the design and fabrication of thin-film Nb gradiometers wi th integrated DC SQUIDs for use in non-destructive evaluation (NDE) an d biomagnetism. Issues of sensitivity, imbalance and field response ar e considered. Results are presented from eddy-current NDE in an unshie lded environment of aluminium plates with sub-surface flaws, and from biomagnetic measurements of spinal and peripheral nerve evoked fields.