Answers are grounded in this paper and cite their sources.
The National High Magnetic Field Laboratory (NHMFL) is building a 25 T, 52 mm bore resistive magnet with field uniformity and stability of 1 ppm over a 1 cm diameter spherical volume (DSV). Upon completion the unshimmed magnet's homogeneity was 48 ppm over 1 cm DSV. It has since been ferro-shimmed to 12 ppm over 1 cm DSV and we are in the process of shimming to the 1 ppm level. Details of the design, construction, shimming and stabilizing are presented.
No takes yet. Share an insight, caveat, or question.
Bird et al. (2000) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: