Design and construction of the superconducting bending magnet for the injection system of the RIKEN SRC

A K2500 superconducting ring cyclotron with 6-sectors is being constructed at RIKEN as an energy booster of the existing K540 ring cyclotron. The bending magnet for beam injection should be superconducting. Required fields are about 4 T and curvature of the coils is about 1.2 m. We developed test coils for the bending magnet. Their results are very promising for the real bending magnet. In the paper the results of the test coils and the design of the real bending magnets are described.