Paul Callaghan gives an introduction to NMR and MRI. This is the 5th video of the series and Field Homogeneity is explained. 10 episode series produced by Magritek Ltd.
video 5: fixing up a non-homogeneous field via shimming coils: I wondered how the shimming coils could be effective if they were not installed in the apparatus; your demonstration could be more clear if you add an on-screen text pop-up stating that an identical shimming coil pack is already installed in the Terranova apparatus, and is operational in the final test. This is a terrific series of videos; thank you for the specific and accessible physics insights!