Enhanced material defects imaging with a radio-frequency atomic magnetometer
arXiv:1811.11061 · doi:10.1063/1.5083039
Abstract
Imaging of structural defects in a material can be realized with a radio-frequency atomic magnetometer by monitoring the material's response to a radio-frequency excitation field. We demonstrate two measurement configurations that enable the increase of the amplitude and phase contrast in images that represent a structural defect in highly electrically conductive and high magnetic permeability samples. Both concepts involve the elimination of the excitation field component, orthogonal to the sample surface, from the atomic magnetometer signal. The first method relies on the implementation of a set of coils that directly compensates the excitation field component in the magnetometer signal. The second takes advantage of the fact that the radio-frequency magnetometer is not sensitive to the magnetic field oscillating along one of its axes. Results from simple modelling confirm the experimental observation and are discussed in detail.
References in corpus (8)
- Detection of NMR signals with a radio-frequency atomic magnetometer
- An ultra-sensitive and wideband magnetometer based on a superconducting quantum interference device
- Electromagnetic induction imaging with a radio-frequency atomic magnetometer
- Eddy current imaging with an atomic radio-frequency magnetometer
- Magnetic induction tomography using an all-optical Rb atomic magnetometer
- Multichannel optical atomic magnetometer operating in unshielded environment
- Non-destructive structural imaging of steelwork with atomic magnetometers
- Nonlinear magneto-optical rotation in the presence of radio-frequency field
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