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Report No.
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J-PARC; The Path to 1 MW at J-PARC, including 400 MeV linac improvement, RCS improvements, and front-end upgrades

Yamamoto, Kazami   

An accelerator system of Japan Proton Accelerator Research Complex (J-PARC) operated since May 2008 for neutron experiments. The accelerator system consists Linac, Rapid Cycling synchrotron (RCS) and Main Ring. The original design of RCS injection energy is 400 MeV, but first operation was started by 181 MeV for budget reason. New acceleration cavities were installed in J-PARC linac summer shutdown of 2013, and user operation to Material and Life science Facility (MLF) with 400 MeV injection energy was started from February 2014. Owing to the beam commissioning with 400 MeV injection energy, the amount of the beam loss was enough small and we established 300 kW continuous operation. In this paper, we report the present status and future plan of J-PARC linac and RCS.

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