Spatial deconvolution algorithm for superconducting planar gradiometer arrays

A digital filter model used previously to describe axial gradiometers is used to study arrays of planar first-order gradiometers. As an application of this technique, a spatial deconvolution algorithm is developed to recover the input field from the output measurements. The influence of parameters such as source depth and the gradiometer array density is investigated by means of computer simulations. With properly designed array the input flux was recovered with errors between 3% and 12%. This provided a contour plot quite similar to the one that would be obtained if the source were detected with a single-loop coil array