An unshielded radio-frequency atomic magnetometer with sub-femtoTesla sensitivity

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dc.contributor.authorKeder, David A.
dc.contributor.authorPrescott, David W.
dc.contributor.authorConovaloff, Adam W.
dc.contributor.authorSauer, Karen L.
dc.date.accessioned2015-09-10T18:08:58Z
dc.date.available2015-09-10T18:08:58Z
dc.date.issued2014-12-31
dc.description.abstractWe demonstrate a radio-frequency potassium-vapor magnetometer operating with sensitivities of 0.3 fT/√Hz at 0.5 MHz and 0.9 fT/ √Hz at 1.31 MHz in the absence of radio-frequency and mu-metal or magnetic shielding. The use of spatially separated magnetometers, two voxels within the same cell, permits for the subtraction of common mode noise and the retention of a gradient signal, as from a local source. At 0.5 MHz the common mode noise was white and measured to be 3.4 fT/ √Hz; upon subtraction the noise returned to the values observed when the magnetometer was shielded. At 1.31 MHz, the common mode noise was from a nearby radio station and was reduced by a factor of 33 upon subtraction, limited only by the radio signal picked up by receiver electronics. Potential applications include in-the-field low-field magnetic resonance, such as the use of nuclear quadrupole resonance for the detection of explosives.
dc.description.sponsorshipThis work was supported by NIITEK Inc., DARPA Contract No. HR0011-13-C-0058, and NSF Grant No. 0730473. A.C. would like to acknowledge support from George Mason University’s Presidential Fellowship and D.K. would like to acknowledge support from the Undergraduate Research Scholars Program at Mason. Publication of this article was funded in part by the George Mason University Libraries Open Access Publishing Fund.
dc.identifier.citationKeder, David A., David W. Prescott, Adam W. Conovaloff, and Karen L. Sauer. “An Unshielded Radio-Frequency Atomic Magnetometer with Sub-femtoTesla Sensitivity.” AIP Advances 4, no. 12 (December 1, 2014): 127159. doi:10.1063/1.4905449.
dc.identifier.doihttp://dx.doi.org/10.1063/1.4905449
dc.identifier.urihttps://hdl.handle.net/1920/9830
dc.language.isoen_US
dc.publisherAIP Publishing LLC
dc.rightsAttribution 3.0 United States
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/us/
dc.subjectCalibration
dc.subjectEnvironmental noise
dc.subjectMagnetic resonance
dc.subjectStatic magnetic fields
dc.subjectCoils
dc.titleAn unshielded radio-frequency atomic magnetometer with sub-femtoTesla sensitivity
dc.typeArticle

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