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Split-type magnetic field generator with wide homogeneous region

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1 Author(s)
T. Shirai ; Japan Electr. Meters Inspection Corp., Tokyo, Japan

This paper discusses the homogeneity of a magnetic field generator for measurement of nuclear magnetic resonance (NMR). It shows that inhomogeneity is caused by an excess number of turns and a discrepancy from the design dimensions. A control circuit consisting of a pair of shim coils and a few Hall elements can improve the homogeneity. With it, a homogeneity of the magnetic field in the split coil of better than ±0.05% over 50 mm was obtained

Published in:

IEEE Transactions on Magnetics  (Volume:37 ,  Issue: 3 )