Inductive shielding for pulsed energy storage magnets

The design of a shield winding to be placed around a superconductive magnet is discussed. By operating the shield and main winding in parallel, it is possible to transfer energy to and from the magnet system without exposing the superconductive coil to a changing field, thereby eliminating ac losses in the superconductor and stabilizer. Such units have applications for CTR devices and for load leveling the power demand of the main ring at the Fermi National Accelerator Laboratory.