Field Measurement and Machinery Placement of the J-PARC RCS Magnets

The 3 GeV synchrotron in the Japan Proton Accelerator Research Complex (J-PARC) is a rapid-cycling synchrotron (RCS), which accelerates a high-intensity proton beam from 400 MeV to 3 GeV at a repetition rate of 25 Hz. RCS is composed of 24 dipole magnets, 60 quadrupole magnets and 18 sextupole magnets. Field measurement was performed for all magnets and adequate results were obtained. In this paper, we will report the results of field measurement and machinery placement of the magnets performed based on those results.