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Performances of compact integrated superconducting magnetometers for biomagnetic imaging
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View: Figures


Image of FIG. 1.
FIG. 1.

Flux gain and the magnetic field noise referred to the pickup coil as a function of the pickup coil length for and .

Image of FIG. 2.
FIG. 2.

Magnetic flux at the detection coil and output flux signal corresponding to a uniform field of 1 pT threading the magnetometer detection coil as a function of the pickup coil side length for .

Image of FIG. 3.
FIG. 3.

Magnetic flux noise of an integrated magnetometer as a function of the of pickup coil side length calculated for and .

Image of FIG. 4.
FIG. 4.

SQUID Magnetometer having an area of and a compact fully integrated magnetometer including an Additional Positive Feedback (APF) circuit and a bipolar feedback coil for low cross-talk operations.

Image of FIG. 5.
FIG. 5.

Scheme of a conducting half space with a current dipole lying at a depth below the surface and parallel to the -plane. The magnetometer is located at a distance from the source.

Image of FIG. 6.
FIG. 6.

Magnetometer output flux as function of the off-axis position for two distances from the dipolar source. The current dipole strength is . The solid, dotted, and dashed curves are referred to the magnetometers MA, MB, and MC, respectively. The inset of Fig. 6 shows the maximum as a function of distance .

Image of FIG. 7.
FIG. 7.

Minimum detectable current dipole as a function of for two values of distance from the dipolar source.

Image of FIG. 8.
FIG. 8.

Minimum detectable dipole as a function of its depth , calculated for values corresponding to the minima of the . The inset shows the curve with a magnified scale for superficial sources.


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Scitation: Performances of compact integrated superconducting magnetometers for biomagnetic imaging