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

Show simple item record Keder, David A. Prescott, David W. Conovaloff, Adam W. Sauer, Karen L. 2015-09-10T18:08:58Z 2015-09-10T18:08:58Z 2014-12-31
dc.identifier.citation Keder, 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. en_US
dc.description.abstract We 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.sponsorship This 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. en_US
dc.language.iso en_US en_US
dc.publisher AIP Publishing LLC en_US
dc.rights Attribution 3.0 United States *
dc.rights.uri *
dc.subject calibration en_US
dc.subject environmental noise en_US
dc.subject magnetic resonance en_US
dc.subject static magnetic fields en_US
dc.subject coils en_US
dc.title An unshielded radio-frequency atomic magnetometer with sub-femtoTesla sensitivity en_US
dc.type Article en_US

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