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A new pre‐impregnated (pre‐preg) ceramic‐based electrical insulation system capable of surviving high superconductor reaction temperatures has been developed for use in superconducting magnets. The use of Nb3Sn superconductors holds great promise for increased magnet performance for high energy physics, fusion, and other applications. A robust, cost‐effective manufacturing process is critical to the successful implementation of these coils. Due to its embrittlement after the high temperature reaction cycle, Nb3Sn cable is usually insulated and wound into the coil prior to heat treatment. An earlier ceramic‐based insulation system, applied using wet‐winding or vacuum impregnation, has been successfully used in the “wind and react” fabrication process. Use of the new pre‐preg system will further simplify the manufacturing process while improving control over the insulation properties. Pre‐preg insulation offers several advantages including improved dimensional control of the insulation, controllable and uni... |
