Magnets and their power supplies of JHF 50-GeV synchrotron

The JHF 50-GeV Synchrotron, a high intensity proton synchrotron, consists of 96 bending magnets, 176 quadrupole magnets and 48 sextupole magnets. The design study of the magnets is now in progress. Also, the conceptual design study of the power supply system has been started. The bending magnet is of a modified window frame type, 6.2 m in length and 1.8 T in magnetic field in peak. The field gradient of the quadrupole magnet is 20 T/m in peak and the bore radius is 66 mm. The total active power of bending and quadrupole magnets is estimated to be 80 MW in peak. Recent results of the design studies of magnets and power supply system are described in this paper.