• H. Hotchi
  JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken

The Japan Proton Accelerator Research Complex (J-PARC) consists of Linac, 3-GeV rapid cycling synchrotron (RCS) and 50-GeV main ring synchrotron (MR). The J-PARC has been beam-commissioned since November 2006. The Linac and RCS have recently completed initial tunings of the basic parameters, and are now in transition from commissioning to operation and also to the challenging phase for aiming at the higher current operation. The MR also has recently started initial tunings in the storage mode. In this talk, the current status of the J-PARC beam commissioning will be outlined together with experimental data obtained in the actual beam tuning procedures.