A Layer-Wound, 8.7-Tesla Superconducting Dipole Magnet

A superconducting dipole magnet is discussed in detail and test results are presented. The performance of the dipole magnet demonstrates that it can operate successfully at least at the lower end of fields in He 1 at about 4.3K and in He 11 between 1.8 and 2.16K. A photograph of the magnet is shown and a cross section is given. One of the goals of fabrication was to maintain the first turn of each layer in positive compression against its respective pole island during operation at the highest current. Target values for the precompression were determined for each layer.