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A 900 MHz NMR magnet with a room temperature, clear bore of 105 mm was recently brought to full field at the NHMFL. The magnet was ramped to 21.1 T on its first run without incurring a quench, since installation into its final cryostat was completed. Issues on superconductor stability were present during magnet charging and are discussed. In addition, the magnet performance in terms of field uniformity and of field stability, with the implementation of a novel design concept of current injection, is presented.
Date of Publication: June 2005