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Active compensation of magnetic field distortions based on vector spherical harmonics field description

Journal Contribution - Journal Article

© 2017 Author(s). An analytic solution to the magnetostatic inverse problem in the framework of vector spherical harmonic basis functions is presented. This formalism is used for the design of a spherical magnetic field compensation system and its performance is compared with an already existing rectangular coil system. The proposed set of spherical coils with 15 degrees of freedom achieves a shielding factor of 1000 or better in a large part of the volume enclosed by the coils for a dipolar type external perturbation.
Journal: AIP Advances
Issue: 3
Volume: 7
Number of pages: 14
Publication year:2017