6533b82dfe1ef96bd1290b99
RESEARCH PRODUCT
Eddy current imaging with an atomic radio-frequency magnetometer
John W. BlanchardArne WickenbrockDmitry BudkerNathan Leefersubject
Frequency responseTechnologyMaterials sciencePhysics - Instrumentation and DetectorsPhysics and Astronomy (miscellaneous)Atomic Physics (physics.atom-ph)MagnetometerAcousticsFOS: Physical sciences02 engineering and technology01 natural sciencesphysics.atom-phlaw.inventionPhysics - Atomic PhysicsEngineeringlaw0103 physical sciencesEddy currentInductive sensorElectrical conductorphysics.ins-detApplied Physics010302 applied physicsInstrumentation and Detectors (physics.ins-det)021001 nanoscience & nanotechnologyElectromagnetic coilPhysical SciencesRadio frequencyElectric current0210 nano-technologydescription
We use a radio-frequency $^{85}$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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-05-02 |