Gradiometer

[icosum]

Hi,
I would like to mesure the inductance of a second order axial gradiometer (+4 -8 +4) made with supraconducting materials (nuibum)!! Is there any idea of any equation for this kind of mesurment?

There is one equation to deal with this kind of materials but it concern only standard coil with one or sevral loop (see the upload file)

 

[FeX32]

Isn't a gradiometer used to measure flux density differences? (not necessarily flux density though)
Do you have coils as part of the meter?


Fe