Conductor and reinforcement materials for the Los Alamos Neutron Science Center 30 T split-pair and future pulse coils

The National High Magnetic Field Laboratory (NHMFL) has designed a high-fre quency split-pair coil system for the Los Alamos Neutron Science Center (LA NSCE) that can, achieve fields up to 30 T and up to 26 T for 10 million cyc les in a 20 mm bore and a 5 mm clear split at the midplane. The magnet syst em pushes the limits of the technology by requiring a nearly clear split, a 2 Hz pulse frequency and a 10 million cycle lifetime. The split is maintai ned mostly clear except for 14 mm radial thickness of aluminum which helps to support the 147 ton magnetic load between the two coil halves, This near ly clear split allows the neutrons to travel mostly unobstructed from sourc e to detector. The 2 Hz pulse frequency requires that the coils be continuo usly cooled with de-ionized water flowing at 15 m/s across the inner diamet ers of each coil. The 10 million cycle lifetime is required due to the numb er of pulses needed to obtain data in the neutron scattering experiment. As a result, a characterization of conductor and reinforcement materials fati gue properties was performed.