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The J-PARC neutrino experimental facility is a conventional neutrino beam-line, shooting the world-intense neutrino beam to the 295 km-far underground neutrino water Cherenkov detector, Super-Kamiokande, for the T2K (Tokai-to-Kamioka) long-baseline neutrino oscillation experiment since 2010. After successful observation of electron neutrino appearance from muon neutrino beam in 2013, the facility operates with both neutrino and anti-neutrino beam production modes, and now accumulates more than 3 x 10^21 protons-on-target (pot) with almost equal pot for neutrino and anti-neutrino mode operation as of 2018. Analysis indicates the CP of the lepton sector can be maximally broken. To establish this observation, Japanese high-energy physics community is strongly promoting to construct the next generation water Cherenkov detector, Hyper-Kamiokande (Hyper-K) at Kamioka site, with about 1 order larger fiducial mass. Recently, seed funding towards the construction of Hyper-K was allocated by a funding agency, and the president of the University of Tokyo pledges to ensure construction commences as scheduled in April 2020.
In parallel to the construction of Hyper-K, it is vitally important to increase the beam power of the J-PARC accelerator and neutrino beamline. So far the neutrino facility has realized to accept proton beam with 485 kW from Main Ring synchrotron (30GeV, 2.5x10^14 ppp with 2.48sec cycle), which is to be increased to 1.3 MW in coming years, by both increasing beam intensity and repetition rate. In this talk, upgrade scenario to realize the MW facility will be presented. Importance of the cooperation between J-PARC and CERN on the high-power target facilities, including novel target material development, is emphasized.
ATS Seminar Organisers: H. Burkhardt (BE), M. Modena (ATS), T. Stora (EN)
Coffee / tea will be served after the seminar in room 30/7-012