Radiation resistant magnets for the J-PARC muon facility

At J-PARC, the M2 line will become a high radiation area with a large amount of radiation originating from the muon production target. Therefore, for the magnets near the muon target, radiation resistance conductor, that is, mineral insulation cable (MIC), was used. Above the saturated magnet yoke, iron radiation shields are installed. Therefore, a careful study of the effects of shielding on the magnetic fields is performed through a non-linear 3D simulation (OPERA-3D).