Coil end design for the SSC collider dipole magnet

The authors describe the design of the coil end for the 50-mm-aperture SSC (Superconducting Super Collider) dipole magnets built at Fermilab. The cable paths are determined from both magnetic and mechanical considerations. The end spacers are designed using the developable surface/grouped end approach, which allows the analysis of strain energy within the conductor groups. Techniques for strain energy minimization are presented, and the behavior of individual conductors within a group is analyzed. The relationship between optimization of magnetic and mechanical variables is discussed. Requirements of manufacturing and inspection of coil end parts are outlined. It is concluded that the developable surface/grouped end approach specified for the SSC-50-mm-aperture dipole magnets has allowed the design of a coil end that is not only the least-strain configuration but also provides good placement and containment of each conductor in the cross section.<
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