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Inductive Imaging of the Concealed Defects with Radio-Frequency Atomic Magnetometers

Bevington, P.; Gartman, R.; Chalupczak, W. (2020) Inductive Imaging of the Concealed Defects with Radio-Frequency Atomic Magnetometers. Applied Sciences, 10 (19). 6871 ISSN 2076-3417

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We explore the capabilities of the radio-frequency atomic magnetometers in the non-destructive detection of concealed defects. We present results from the systematic magnetic inductive measurement of various defect types in an electrically conductive object at different rf field frequencies (0.4-12 kHz) that indicate the presence of an optimum operational frequency of the sensor. The optimum in the frequency dependence of the amplitude/phase contrast for defects under a 0.5-1.5 mm conductive barrier was observed within the 1-2 kHz frequency range. The experiments are performed in the self-compensated configuration that automatically removes the background signal created by the rf field producing object response.

Item Type: Article
Keywords: non-destructive testing; magnetic induction tomography; atomic magnetometer
Subjects: Time and Frequency > Time
Identification number/DOI: 10.3390/app10196871
Last Modified: 23 Feb 2021 14:55
URI: http://eprintspublications.npl.co.uk/id/eprint/9054

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