What Is the Best Coil Orientation in the Slingram Electromagnetic Prospecting Method?

In the Slingram electromagnetic method the appropriate coil orientation must be chosen. Until now, the choice of this parameter has not been discussed but as it influences the shape of the anomalies and their magnitude, it is important to try to define the best possible arrangement. Theoretical studies of the 1D layered model, the response of a dipole and the response of a 3D body are used to define the best arrangement. The perpendicular configuration with a vertical moment transmitter gives better results in most cases and the building of an apparatus with this coil arrangement should give very interesting results.