NDLI: HTS SQUID NDE of Curved Surfaces Using Background Field Cancellation Techniques

Content Provider	IEEE Xplore Digital Library
Author	Keenan, S. Romans, E.J. Donaldson, G.B.
Copyright Year	2002
Abstract	Single-layer high-temperature superconducting SQUID gradiometers are well established for measuring small localized magnetic fields in the presence of much larger background interference. Such sensors have proved extremely useful for eddy-current nondestructive evaluation (NDE) of aircraft and other metallic structures. Most applications to date have involved either the sensor remaining stationary or being moved in a straight line in an unshielded environment. However it is desirable for many field mapping applications for the sensor to be rotated or tilted in the Earth's field whilst retaining full device sensitivity. We report on the development and performance of a portable NDE scanning system which uses background field cancellation techniques to allow the device orientation to change whilst mapping the surface of a curved wing structure.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	784
Ending Page	787
Page Count	4
File Size	2003548
File Format	PDF
ISSN	10518223
Volume Number	17
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	High temperature superconductors SQUIDs Magnetic field measurement Magnetic sensors Geophysical measurements Interference Magnetic flux Aircraft Superconducting magnets Geophysics superconducting devices Nondestructive evaluation
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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