Eddy current imaging with an atomic radio-frequency magnetometer
Instrumentation and Detectors
2016-05-25 v1 Atomic Physics
Abstract
We use a radio-frequency Rb alkali-vapor cell magnetometer based on a paraffin-coated cell with long spin-coherence time and a small, low-inductance driving coil to create highly resolved conductivity maps of different objects. We resolve sub-mm features in conductive objects, we characterize the frequency response of our technique, and by operating at frequencies up to 250 kHz we are able to discriminate between differently conductive materials based on the induced response. The method is suited to cover a wide range of driving frequencies and can potentially be used for detecting non-metallic objects with low DC conductivity.
Cite
@article{arxiv.1603.05067,
title = {Eddy current imaging with an atomic radio-frequency magnetometer},
author = {Arne Wickenbrock and Nathan Leefer and John W. Blanchard and Dmitry Budker},
journal= {arXiv preprint arXiv:1603.05067},
year = {2016}
}
Comments
6 pages, 4 figures