Four-channel optically pumped atomic magnetometer for magnetoencephalography

Colombo, Anthony P.; Carter, Tony R.; Borna, Amir; Jau, Yuan -Yu; Johnson, Cort N.; Dagel, Amber L.; Schwindt, Peter D. D.

doi:10.1364/OE.24.015403

Four-channel optically pumped atomic magnetometer for magnetoencephalography

Journal Article · Wed Jun 29 00:00:00 EDT 2016 · Optics Express

DOI:https://doi.org/10.1364/OE.24.015403· OSTI ID:1325716

Colombo, Anthony P. ^[1]; Carter, Tony R. ^[1]; Borna, Amir ^[1]; Jau, Yuan -Yu ^[1]; Johnson, Cort N. ^[2]; Dagel, Amber L. ^[1]; Schwindt, Peter D. D. ^[1]

Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Charles Stark Draper Lab., Cambridge, MA (United States)

We have developed a four-channel optically pumped atomic magnetometer for magnetoencephalography (MEG) that incorporates a passive diffractive optical element (DOE). The DOE allows us to achieve a long, 18-mm gradiometer baseline in a compact footprint on the head. Using gradiometry, the sensitivities of the channels are < 5 fT/Hz^1/2, and the 3-dB bandwidths are approximately 90 Hz, which are both sufficient to perform MEG. Additionally, the channels are highly uniform, which offers the possibility of employing standard MEG post-processing techniques. As a result, this module will serve as a building block of an array for magnetic source localization.

View Accepted Manuscript (DOE)

Research Organization:: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: NIH; USDOE

Grant/Contract Number:: AC04-94AL85000

OSTI ID:: 1325716

Report Number(s):: SAND--2016-5979J; 642490

Journal Information:: Optics Express, Journal Name: Optics Express Journal Issue: 14 Vol. 24; ISSN 1094-4087; ISSN OPEXFF

Publisher:: Optical Society of America (OSA)Copyright Statement

Country of Publication:: United States

Language:: English

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Characterizing atomic magnetic gradiometers for fetal magnetocardiography Sulai, I. A.; DeLand, Z. J.; Bulatowicz, M. D. Review of Scientific Instruments, Vol. 90, Issue 8 https://doi.org/10.1063/1.5091007	journal	August 2019
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