Automatic Shielding-Shimming Magnetic Field Compensator for Excluded Volume Applications

作者：Forte Guillermo O^*; Farrher German; C****i Luis R; Anoardo Esteban

来源：IEEE Transactions on Control Systems Technology, 2010, 18(4): 976-983.

DOI：10.1109/TCST.2009.2030174

• Active shielding
• active shimming
• excluded volume
• fast field cycling nuclear magnetic resonance (FFC-NMR)
• magnetic field compensation
• multiple-input multiple-output (MIMO) control

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 (shimming) 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.

• 出版日期2010-7