The first actively shielded high resolution NMR magnet was developed and successfully demonstrated. The magnet has excellent field homogeneity in a very large volume and lineshape characteristics exceed the specifications of the standard magnets. Shielding performance is also outstanding, with the 5 G line located only 1 m radially and 1.5 m axially from the magnet center. We are reporting the magnet specifications, details of the design and fabrication, magnet training, field mapping and lineshape results.

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The Teuu Accelerator Center has constructed four models of a superferric correction quadrupole magnet for possible use in the SSC. One of them was already tested. The design incorporates a coil winding process developed at Multiwire, Inc. and Brookhaven National Laboratory. This process uses ultrasonic energy to accurately adhere a kapton-wrapped superconducting wire in a race track configuretion onto a substrate material 0.010 cm thick. The subdrate is subsequently rolled around a fame in much the same way that a jelly roll is made. The use of iron to shape the field improves efficiency and provides a coil package preload. This paper provides design parameters and performance data for the quadrupole magnet.

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