Magnetocardiography with a modular spin-exchange relaxation free atomic magnetometer array
Abstract
We present a portable four-channel atomic magnetometer array operating in the spin exchange relaxation-free regime. The magnetometer array has several design features intended to maximize its suitability for biomagnetic measurement, specifically foetal magnetocardiography, such as a compact modular design, and fibre coupled lasers. The modular design allows the independent positioning and orientation of each magnetometer, in principle allowing for non-planar array geometries. Using this array in a magnetically shielded room, we acquire adult magnetocadiograms. These measurements were taken with a 6-11 fT Hz^(-1/2) single-channel baseline sensitivity that is consistent with the independently measured noise level of the magnetically shielded room.
Keywords
Cite
@article{arxiv.1106.4779,
title = {Magnetocardiography with a modular spin-exchange relaxation free atomic magnetometer array},
author = {R Wyllie and M Kauer and G Smetana and R Wakai and T Walker},
journal= {arXiv preprint arXiv:1106.4779},
year = {2012}
}
Comments
15 pages, 5 figures