Reliability of the electrical insulation system for the HDM

The Westinghouse Electric Corporation (WEC) is under contract to design and build the Higher Energy Booster dipole magnets (HDM's) for the SSCL through low rate initial production (LRIP). The first phase of the HDM program is the fabrication and test of short 1.8 m HDM model magnets designed by the SSCL. This technology transfer phase is well underway with the delivery of the first WEC built HDM model magnet, DSB701 to the SSCL and the completion of the test program conducted at the SSCL Superconducting Cable and Magnet Test Laboratory (SMCTL) in April of this year. Model magnet DSB702 has been delivered to the SSCL for testing in May and June of this year, and DSB703 is nearing completion. This paper presents a summary of lessons learned from electrical insulation problems discovered during the DSB model magnet program. Insulation reliability and risk issues impacting the HDM prototype design being developed by WEC are discussed