Title :
Development of a 15 T/17 T solid state NMR magnet system
Author :
Coffey, D.M. ; McGhee, R.W. ; Wu, Y. ; Keener, S.
Author_Institution :
Cryomagnetics Inc., Oak Ridge, TN, USA
fDate :
6/1/1997 12:00:00 AM
Abstract :
A high field NMR magnet system, up to 17 Tesla at 2.0 K with magnet bore of 52 mm was developed. This magnet system will be used to perform NMR experiments in the field of condensed matter physics. The magnet consists Nb/sub 3/Sn and NbTi solenoids. The central field is 15 T at 4.2 K and 17 T at 2.0 K. The field homogeneity is better than 10 ppm over 1 cm diameter sphere volume without shims. The magnet can be operated in the persistent mode and driven mode. A persistent switch was installed on the magnet and the field decay rate was less than 5 ppm/hour in persistent mode operation. The complete magnet was built into a cryostat equipped with a lambda plate refrigerator. In this paper, the magnet test results are presented.
Keywords :
NMR spectrometers; protection; solenoids; superconducting coils; superconducting magnets; 15 T; 17 T; 2 to 4.2 K; 52 mm; NMR experiments; Nb/sub 3/Sn; Nb/sub 3/Sn solenoids; NbTi; NbTi solenoids; condensed matter physics; cryostat; driven mode operation; high field NMR magnet; lambda plate refrigerator; persistent mode operation; persistent switch; quench protection; solid state NMR magnet system; Boring; Magnetic switching; Niobium compounds; Nuclear magnetic resonance; Physics; Solenoids; Solid state circuits; Switches; Tin; Titanium compounds;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
