Accelerator magnet designs using superconducting magnetic shields

The possibility of a superconducting shield for accelerator dipole and quadrupole magnets is explored. It is found that the decentering instability associated with iron shields is avoided by the strong diamagnetic shield. In addition, the shield can be much thinner, occupying less radial space in the cryostat. By avoiding the weight and decentering forces of the iron shield, one can reoptimize the cryostat design and substantially reduce the mass which must be cooled to helium temperatures. Promising applications in which these advantages are important are p-p collider interaction region quadrupoles, corrector dipoles for collider detectors, and high-field accelerator dipoles