J-PARC commissioning results

The J-PARC (Japan Proton Accelerator Research Complex) is a project to pursue frontier science and nuclear technology. It comprises a 400-MeV linac, a 3-GeV rapid-cycling synchrotron (RCS), a 50-GeV main ring synchrotron (MR) and experimental facilities. The buildings and conventional facilities will be completed in succession in the Japanese Fiscal Year 2005 and 2006, when the installation of the accelerator components will be actually started at Tokai site. A peak current of 30 mA was accelerated up to 20 MeV in the DTL beam commissioning at the KEK site and will be moved to Tokai. At the initial stage, the beam commissioning of the linac at an energy of 181 MeV will be started in September, 2006, followed by the RCS and MR beam commissioning. The recent results of the developments of accelerator components, the present construction status and the commissioning schedule are presented.