Mobile magnetic anomaly detection using a field-compensated high-T-c single layer SQUID gradiometer
Keenan, S. T. and Blay, K. R. and Romans, E. J. (2011) Mobile magnetic anomaly detection using a field-compensated high-T-c single layer SQUID gradiometer. Superconductor Science and Technology, 24 (8). 085019. ISSN 0953-2048 (https://doi.org/10.1088/0953-2048/24/8/085019)
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High-Tc single layer SQUID gradiometers are useful for measuring small localized magnetic fields in the presence of much larger background interference. Such sensors have been used extensively for eddy-current non-destructive evaluation and biomagnetic measurements, where the sensor is stationary or scanned in a straight line. However for magnetic anomaly detection (MAD) and geophysical exploration it is necessary that gradiometers can undergo rotation and vibration in the Earth's magnetic field without degrading their sensitivity. We describe a portable system that uses background field cancellation techniques to allow a gradiometer's orientation to change during magnetic mapping applications without compromising its sensitivity. We describe the system setup and demonstrate its capability to detect a magnetic target whilst undergoing random motion in a laboratory environment.
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Item type: Article ID code: 40818 Dates: DateEvent2011PublishedSubjects: Science > Physics Department: Faculty of Science > Physics Depositing user: Pure Administrator Date deposited: 09 Aug 2012 09:00 Last modified: 11 Nov 2024 10:12 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/40818