Automatic Shielding-Shimming Magnetic Field Compensator for Excluded Volume Applications

GUILLERMO FORTE; GERMAN FARRHER; LUIS CANALI; ESTEBAN ANOARDO

IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

Lugar: New York; Año: 2010 vol. 18 p. 976 - 983

1063-6536

We discuss the problem of automatic magnetic field compensation within an excluded volume where the magnetic field cannot be sensed in a direct way. Both magnetic field spatial average (shielding) and first order orthogonal gradients (shim- ming) are considered. The active shielding-shimming compensator is based on a multiple-input multiple-output controller driving a specifically designed coil-set. The magnetic field and its gradients are calculated from the readings of ten hall sensors located outside the exclusion volume.