High field superconducting magnets for accelerators and particle beams

Experience in designing precision superconducting magnets for fields up to 60kG will be described. Realizable construction tolerances and their impact on field accuracy is discussed. For dipole fields up to 60kG or more, rectangular coil window frame type magnets will be compared with circular or elliptical coil designs. In all cases, the same superconductor current density versus maximum field performance is assumed. The comparison will include field quality and correction required as a function of aperture size, stored energy, ampere turns required, and overall magnet size. In quadrupole design the impact of the allowed superconductor current density being roughly inversely proportional to peak field is severe. For gradients up to one Tesla/cm or greater, similar comparisons for different types of quadrupole construction is made.