Development of a hybrid LTS-HTS solenoid magnet for future intense muon beam lines

A hybrid R&D magnet for future Phase Rotation Intense Secondary Meson (PRIS M) beam project was designed and fabricated. The R&D solenoid magnet, which consists of an inner HTS coil and outer LTS coils, provides a central magn etic field of 10.6T at 90A in a warm bore diameter of 40 mm. The inner HTS coil was made by solenoid-winding technique without degradation of the BSCC O tapes. The R&D magnet was successfully cooled bg using cyrocoolers, and w as stably operated at the design central field and was tested up to the max imum central field of 11.6T.