Magnetic induction imaging with a cold-atom radio frequency magnetometer

Year: 2020

Authors: Fregosi A., Gabbanini C., Gozzini S., Lenci L., Marinelli C., Fioretti A.

Autors Affiliation: Istituto Nazionale di Ottica, CNR-INO, via Moruzzi 1, 56124 Pisa, Italy; Department of Physical Sciences, Earth and Environment, University of Siena, via Roma 56, 53100 Siena, Italy; Facultad de Ingenierıa, Instituto de Fısica, Universidad de la Republica, J. Herrera y Reissig 565, 11300 Montevideo, Uruguay

Abstract: The sensitive detection of either static or radio frequency (RF) magnetic fields is essential to many fundamental studies and applications. Here, we demonstrate the operation of a cold-atom-based RF magnetometer in performing 1D and 2D imaging of small metallic objects. It is based on a cold 85Rb atomic sample and operates in an unshielded environment with no active field stabilization. It shows a sensitivity up to 200 pT / Hz in the 5-35 kHz bandwidth range and can resolve a 0.4mm wide cut in a 0.8mm thick metallic foil. The characteristics of our system make it a good candidate for applications in civil and industrial surveillance.

Journal/Review: APPLIED PHYSICS LETTERS

Volume: 117 (14)      Pages from: 144102-1  to: 144102-5

More Information: We are indebted to L. Marmugi and F. Renzoni for enlightening discussions about the OAM operation and acknowledge technical assistance from A. Barbini, F. Pardini, M. Tagliaferri, and M. Voliani. This work was partially funded by the ERA-NET Cofund Transnational Call PhotonicSensing-H2020, Grant Agreement No. 688735, project “Magnetic Induction Tomography with Optical Sensors” (MITOS)/Regione Toscana.
KeyWords: TOMOGRAPHY; ARRAY
DOI: 10.1063/5.0020415

Citations: 6
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