J-PARC Neutrino Experimental Facility - Index to individual talks - Yoshiaki Fujii (KEK/J-PARC) for the Neutrino Experimental Facility 1. Perspective 2. T2K experiment 3. J-PARC Overview 4. Neutrino Experimental Facility 5. Summary 2017/9/18 NBI 2017 1
1. Perspective KEK-PS (5.5kW) J-PARC ( à 750kW) J-PARC (1.3MW) Beam . . . and New Accelerator S uper S uper K amiokande -IV SK-Gd Hyper-K SK-II SK-III K amiokande ND280 ND280-Upgraded Detectors . . . and New Detector K2K T2K T2K-II J-PARC & Kyper-K Neutrino n - nucleus interaction Experiments Intense neutrino beam test bench . . . and New Experiment MINOS NOvA NuMI 750kW 2017/9/18 NBI 2017 2
1. Perspective My talk on this KEK-PS (5.5kW) J-PARC ( à 750kW) J-PARC (1.3MW) Beam . . . and New Accelerator S uper S uper K amiokande -IV SK-Gd Hyper-K SK-II SK-III K amiokande ND280 ND280-Upgraded Detectors . . . and New Detector K2K T2K T2K-II J-PARC & Kyper-K Neutrino n - nucleus interaction Experiments . . . and New Experiment Intense neutrino beam test bench MINOS NOvA NuMI 750kW 2017/9/18 NBI 2017 3
T2K Experiment 2017/9/18 NBI 2017 4
2. T2K experiment - Outline T2K collaboration with ~500 reseachers from 62 institutes of 11 countries. Near Detector ND280 Neutrino Beam Super Kamiokande With intense muon neutrino (or anti-neutrino) beam generated at J-PARC, J-PARC @ Tokai and with ND280 and Super-Kamiokande detectors, measure neutrino oscillation and obtain - neutrino mixing angles q ij - CP phase angle d 2017/9/18 NBI 2017 5
2. T2K experiment- Achievement Total accumulated POT reached 22.3 x10 20 Stable 460kW operation achieved n e appearance w/7.3 s n e appearance w/3.1 s maximal n q 23 n e appearance w/2.5 s maximal q 23 d cp=0 w /90%C.L. appearance n e d cp=0 w /95%C.L. First suggestion on d cp 1st combined anaysis à d cp, maximal q 23 2017/9/18 NBI 2017 6
2. T2K experiment- Achievement Total accumulated POT reached 22.3 x10 20 Stable 470kW operation chieved n e appearance w/7.3 s n e appearance w/3.1 s maximal n q 23 n e appearance w/2.5 s maximal q 23 d cp=0 w /90%C.L. appearance n e First suggestion on d cp 1st combined anaysis à d cp, maximal q 23 2017/9/18 NBI 2017 7
2. T2K experiment- Achievement Total accumulated POT reached 22.3 x10 20 Stable 470kW operation chieved n e appearance w/7.3 s n e appearance w/3.1 s maximal n q 23 n e appearance w/2.5 s maximal q 23 d cp=0 w /90%C.L. appearance n e First suggestion on d cp 1st combined anaysis à d cp, maximal q 23 2017/9/18 NBI 2017 8
2. T2K experiment - Newest Results On Aug. 4th, T2K released the newest analysis results using 22.3 x10 20 POT data. [ Plots taken from the seminor by M.Hartz ] d CP ; CP conserving values 0, p fall q 23 consistent to maximal mixing. outside of the 2 s C.L. interval. +0.60 Best-fit d CP = -1.83 for N.H. - 0.66 Needs to accumulate more data for more conclusive results. 2017/9/18 NBI 2017 9
2. T2K experiment - T2K-II : Extended T2K Operation M.H. unknown case Extension to T2K-II obtained stage-1 status at the J-PARC PAC of July 2016. - Accumulate 20x10 21 POT by 2026 for 3 s sensitivity to CP violation in neutrino oscillation. - With >MW accelerator & neutrino beam-line, ND -upgrade, and Gd-added SK ND upgrade in progress with CERN SPSC EoI-015. T2K-II T2K-II improved feature ・ MR beam power to 1.3MW with - 1.16s operation cycle with new P.S. - reinforced RF system ・ Neutrino beamline upgrade for - cooling capacity improvement - radio-active water disposal ・ Install new detectors in ND 280 ・ SK tank refurbishment and adding Gd 2017/9/18 NBI 2017 10
2. T2K experiment - Beyond T2K-II : J-PARC à Hyper-K, and more Hyper-Kamiokande Detector - Fiducial volume = 190kton (x10 than SK ) - For various physics stronghold J-PARC 1.3MW beam for Hyper-K - Establish CP violation and precision neutrino physics - KEK's first priority in Project Implementation Plan. Project Status - On the MEXT Roadmap and Science Council's Master Plan - MoU concluded between ICRR and KEK/IPNS on promotion. - Budget request planned to be submitted from U.Tokyo Discussions/R&Ds are being held for further ambicious projects - Intermediate detector / Far detector at Korea / Liq.Ar detector - New booster ring at J-PARC - New proton LINAC at Tsukuba Comparison with DUNE depends and more. on assumption. 2017/9/18 NBI 2017 11
3. J-PARC Overview 2001 Start construction J-PARC = Japan Proton Accelerator Research Complex Nov.2006 LINAC operation start Jointly constructed and operated by JAEA and KEK for Oct.2007 RCS operation start May 2008 MLF/MR operation start wide research purposes from elementary particle to life science. Dec.2008 MR achieved 30GeV Jan.2009 Hadron experiment start Apr.2009 Neutrino experiment start LINAC : 330m-long. Accelerate H- LINAC � to 400MeV and inject to RCS. RCS : 350m-circumference. Convert H- to proton and accelerate to 3GeV, RCS � and pass to MLF/MR. Neutrino � MR : 1.5km-circumference. Accelerate proton to30GeV and hand it to hadron or neutrino experimental facilities. MR � Neutrino experimental facility MLF � MLF : Material science and life science with neutron and muon beam. Hadron : Particle nd Nuclear physics Hadron � using secpndary beam. 2017/9/18 NBI 2017 12
Neutrino Experimental Facility 2017/9/18 NBI 2017 13
4. Neutrino Experimental Facility : Event History MLF fire Hadron Accident The earthquake Start Experiment PS trip. Neu Fx septum failures. Target He vacuum leak pipe repair MR vacuum leak. First Beam in April 2009 Beam window Horn N.C. & Horn Power replacement replacement supply renewal 2017/9/18 NBI 2017 14
4. Neutrino Experimental Facility : Outline Secopndary Primary Main Ring Neutrino beam and Beamline Beamline Acceleraotr Near Detectors Beam Near Decay Target Dump Neutrino Muon Volume Horns Forest for wind/sand break Detectors Monitors Helium Vessel n p Pacific Ocean µ 295km To Kamioka 2017/9/18 NBI 2017 15
Primary Beamline 2017/9/18 NBI 2017 16
4. Neutrino Experimental Facility ; Primary Beamline The purpose of the primary beam line is to deliver protons on the target - with proper position, size and angle - high-quality neutrino beam } for { - human/beamline safety - accurately, stably and reliably Final Focus section : Targetting Normal-Conducting Magnets p n ARC section : µ P Bend beam to Kamioka by 80 ° 295km Super-Conducting To Kamioka Magnets Preparation Section : Key Components: Beam parameter - Beam Monitors conversion from MR to ARC. - Control and Interlocks Normal-Conducting - Magnet Power Supplies Magnets 2017/9/18 NBI 2017 17
4. Neutrino Experimental Facility ; Primary Beamline The purpose of the primary beam line is to deliver protons on the target - with proper position, size and angle - high-quality neutrino beam } for { - human/beamline safety - accurately, stably and reliably Findings ・Successfully delivering 460kW beam stably and accurately with high up-time and low beam loss, thus low residual radiation. (The most downstream part suffers high radiation from target station.) ・A few faults experienced. Countermeasure installed, and system further enhanced. ・Expect almost no issue (but not none) up to 750kW. Several improvement needed for 1.3MW. Wait for talks of Sakashita-san for control/interlock, Megan-san, Yu-san, and Ashida-san for beam monitors. 2017/9/18 NBI 2017 18
4. Neutrino Experimental Facility ; Primary Beamline The purpose of the primary beam line is to deliver protons on the target - with proper position, size and angle - high-quality neutrino beam } for { - human/beamline safety - accurately, stably and reliably A few words on other components ・Normal-conducting magnets are excellent. Caused no beam down. Water-leak happened once during annual maintenance. Upstream magnets are non-organic. However beam loss is far lower than feared. ・Power supplies for N.C. magnets were all renewed in 2014. No trips/fluctuations/jumps observed except for initial failure. ・Super-conducting magnets and cryogenic system are also excellent. Very few unexpected quench happened. ・Periodical survey with laser tracker/optical scopes/GPS conducted. - LT gives ~20 µ m-accuracy. - GPS direction accuracy ~0.1mrad, stability ~0.01mrad (3m/300km). ・Water-level height gauge continuously monitoring the tunnel floor height. 2017/9/18 NBI 2017 19
Secondary Beamline 2017/9/18 NBI 2017 20
4. Neutrino Experimental Facility ; Secondary Beamline Beam Dump Decay Volume Muon Monitors Target Station Horns Window Block-off Let pions decay to focus Target Real-time measure- He-filled vessel for Baffle neutrino ment of neutrino particles other into muon and target and horns with beam beam properties than neutrino muon neutrino shields & remotes. The purpose of the Near secondary beam line is Neutrino Detectors simply to generate neutrino - withstanding heat load, n p thermal shock and µ P radiation damage, - handling radiation and 295km Secondary Beam-line radioactive waste To Kamioka Key Issues: - Heat Load - Radioacitve waste 2017/9/18 NBI 2017 21
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