Winding of the Navy SMES background coil

The Navy SMES background coil was made by stacking 18 double pancakes and connecting them in series to form a superconducting magnet capable of storing 48 MJ of energy. Each double pancake was wound starting in the middle of the conductor and winding outward for each layer. Insulators were placed between each pancake layer which were also used for lifting support. Instruments for the coil protection system control and magnetic field monitoring were attached after final assembly.