Accelerator design for 1.3-MW beam power operation of the J-PARC Main Ring

Abstract The J-PARC Main Ring (MR) has supplied the high-intensity proton beam for T2K long-baseline neutrino experiment since 2010. present power is 510 kW and total number of protons on target reaches $3.64\times10^{21}$. To observe charge-conjugation parity-transformation (CP) violation in lepton sector with high accuracy, more need to be delivered target. project upgrade 1.3 MW started as a mid-term plan MR. In parallel preparing full technical design report, designs hardware upgrades using new technologies all accelerator components that are necessary deliver 1.3-MW summarized consolidated this short paper. Further, paper includes dynamics studies simulation results handling $3.3\times 10^{14}$ per pulse (ppp) without significant loss ring transport lines. Hyper-Kamiokande (HK) recently been approved, construction started; MR HK will work together efficiently study CP violation.