Sensitivity and spatial resolution of square loop SQUID magnetometers

Details Sensitivity and spatial resolution of square loop SQUID magnetometers Sensitivity and spatial resolution of square loop SQUID magnetometers

2008-03-31

arxiv.org/abs/0803.4425v1

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1016/j.physc.2008.08.005

We calculate the flux threading the pick-up coil of a square SQUID magnetometer in the presence of a current dipole source. The result reproduces that of a circle coil magnetometer calculated by Wikswo with only small differences. However it has a simpler form so that it is possible to derive from it closed form expressions for the current dipole sensitivity and the spatial resolution. The results are useful to assess the overall performance of the device and to compare different designs.

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