July 28, 2020 to August 6, 2020
virtual conference
Europe/Prague timezone

J-PARC Neutrino Beamline Upgrades towards 1.3 MW Beam Power for Long-Baseline Neutrino Oscillation Experiments in Japan

Jul 30, 2020, 9:40 AM
virtual conference

virtual conference

Talk 11. Accelerator: Physics, Performance, and R&D for Future Facilities Accelerator: Physics, Performance, and R&D for Future Facilities


Tetsuro Sekiguchi


The J-PARC neutrino beamline produces a high intensity neutrino beam using 30 GeV protons from the J-PARC Main Ring (MR) accelerator for the T2K long baseline neutrino oscillation experiments. The MR accelerator and neutrino beamline achieved 515kW stable operation during the most recent run. MR upgrades toward 1.3 MW beam power are being planned for further running of the T2K and future Hyper-Kamiokande experiments by shortening the repetition cycle (2.48s to 1.16s) and increasing the number of protons per spill (2.6x$10^{14}$ to 3.2x$10^{14}$ protons per spill). The neutrino beamline will also be upgraded to accept the 1.3 MW proton beam. The main challenges in the neutrino beamline are precise and safe handling of the very high intensity proton beam and robustness of the secondary beamline components in a very high radiation environment. We will present the ongoing beamline upgrade project including development of new beam monitors, an enhanced remote handling system, cooling capacity improvements for secondary beamline components, enforcement of radioactive waste treatment, neutrino flux improvement with higher horn current, and DAQ/control system upgrades.

Primary author


Son Cao (KEK) Megan Friend (High Energy Accelerator Research Organization (JP)) Yoshiaki Fujii (KEK) Taku Ishida (KEK) Takashi Kobayashi (KEK) Tsunayuki Matsubara (KEK) Takeshi Nakadaira (HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION, KEK) Kazuo Nakayoshi (KEK) Yuichi Oyama (KEK) Ken Sakashita (High Energy Accelerator Research Organization (JP)) Masaru Tada (KEK)

Presentation materials