Active compensation of magnetic field distortions based on vector spherical harmonics field description
oleh: G. Wyszyński, K. Bodek, S. Afach, G. Bison, Z. Chowdhuri, M. Daum, B. Franke, S. Komposch, B. Lauss, D. Ries, G. Zsigmond, M. Perkowski, D. Rozpedzik, J. Zejma, M. Fertl, P. A. Koss, N. Severijns, E. Wursten, K. Kirch, A. Kozela, G. Quéméner, A. Schnabel
| Format: | Article |
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| Diterbitkan: | AIP Publishing LLC 2017-03-01 |
Deskripsi
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.