A 1.6 GeV/c superconducting switching magnet

A superconducting switching magnet capable of bending a 1.6 GeV/c beam to ±16° has been designed and is currently under construction. In the operating range of up to 1.75 T the design field uniformity is better than 0.1% in the volume occupied by the beam. The coils are wet wound with a filled epoxy and are designed to have an average current density of 17 kA/cm2when operated at the nominal maximum current of 100 A. In order to keep the liquid helium consumption low, consistent with a weekly batch-fill operation, the magnet will operate in persistant mode with small resistive coil correction magnets to provide for fine tuning of the beam.