The superconducting coils for the Pion therapy facility of the Swiss Institute for Nuclear Research

130 flat superconducting pancake coils were manufactured for the Pion Therapy Facility of SIN. The windings made from a low-loss cable of NbTi filamentary wires are surrounded by a cooling tube and a copper mesh for better heat transfer. They are embedded in a glass-epoxy plate and impregnated with a special epoxy resin. The very short training and successful commissioning of the two ring magnets show the validity and effectiveness of the design.