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US Participation in The T2K Beamline and the 280 m Near Detector

US Participation in The T2K Beamline and the 280 m Near Detector. Chang Kee Jung State University of New York at Stony Brook for the T2K US B280 Collaboration. First NuSAG Meeting, Washington D.C. June 1, 2005. T2K (Tokai to Kamioka). 0.75 MW 50 (40) GeV PS n m off-axis beam:

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US Participation in The T2K Beamline and the 280 m Near Detector

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  1. US Participation in The T2K Beamline and the 280 m Near Detector Chang Kee Jung State University of New York at Stony Brook for the T2K US B280 Collaboration First NuSAG Meeting, Washington D.C. June 1, 2005

  2. T2K (Tokai to Kamioka) 0.75 MW 50 (40) GeV PS nmoff-axis beam: (2.5o nominal, 2o~3o coverage) ~1GeV energy nm→ neappearance nm→ nxdisappearance (m223) ~ 104 eV2 and (sin2223 ) ~ 0.01 NCmeasurement Neutrino interaction studies • First long baseline neutrino oscillation experiment proposed to measure q13 • Project approved by the Japanese Government in Dec. 2003 • Data taking will start in Apr. 2009

  3.  T2K Experiment and Detector Complex target ND280 SuperK beamline decay volume 2km detector muon monitor T2K Scope Approved in Japan US B280 Proposal Not yet approved US 2km Proposal Two separate US proposals

  4. J-PARC Accelerator Complex (40 GeV) (200 MeV)

  5. T2K Neutrino Beamline at J-PARC

  6. Offaxis Beam - Narrow Intense Beam

  7. 280m Near Detector (ND280)

  8. T2K Sensitivity on q13

  9. Changes since LOI and Updated Sensitivity 10-2 10-3 0.01 sin2213  slight reduction in the statistics and slight increase in the ebackground

  10. Sensitivity to ne appearance

  11. Muon-neutrino Disappearance

  12. Design and Construction Status

  13. Combined Function Superconducting Magnets RHIC dipole RHIC quad Original plan 20 SC dipoles + 20 SC quads BNL and Stony Brook reevaluation 28 combined function SC magnets cost savings coupled dipole+quad  require correctors R&D Funded by U.S.-Japan Collaboration Work in JFY03 ~$150k @BNL Final design (KEK) Combined Function  Bend and focus

  14. Target beam 1st Horn 2nd Horn 3rd Horn High intensity beam Larger inner conductor diameter higher current & three horns Target and Horn System Beam Characteristics: 4.2 s pulses in every 3.5 s 8 (58 ns) bunches/pulse 3 x 1014 protons/pulse Target: 2.6MJ in 5ms Aluminum cannot withstand. Only low-Z material such as graphite or beryllium.

  15. Decay Volume

  16. Decay Pipe Construction

  17. T2K Schedule

  18. T2K International Collaboration and its Organization • 148 Physicists from 52 institutions from 12 countries • Spokesperson: K. Nishikawa (Kyoto U., current K2K Spokesperson) • International (Interim) Board of Representatives (IBR) • Spokesperson, KEK representative, ICRR representative and 13 regional representatives • Acts as an interim executive committee • US Reps: C.K. Jung (IBR Chair), K. McFarland and H. Sobel • Project Coordinators • Working Groups • Beamline, Proton beam monitors, Target&Horn, Beam line control/electronics, Muon monitor&280m detectors, 2km detectors • New International Collaboration Agreement is being prepared by a committee chaired by Jung

  19. Proposed US Contributions to the T2K Neutrino Beamline and ND280 “The overall philosophy adopted in selecting our contributions to the T2K experiment is to identify critical components that match our expertise and experience” Many of the items we proposed to contribute were requested by the Japanese T2K leadership

  20. T2K US B280 Collaboration • 34 Members from 6 Institutions (as of May 2005) • BNL • S. Bellavia, M. Goldhaber, M. Harrison, H. Kirk, N. Simos and Peter Wanderer • University of Colorado • L. Bartoszek, R. Nelson and Eric Zimmerman • Lousiana State University • J. Goon, S. Hatakeyama, Thomas Kutter and B. Svoboda • Stony Brook University • Chang Kee Jung, K. Kobayashi, G. Lopez, Clark McGrew, Peter. Paul, A. Sarrat, L. P. Trung, L. Whitehead and C. Yanagisawa • University of Rochester • A. Bodek, R. Bradford, H. Budd, J. Chvojka, Steve Manly, Kevin McFarland, J. Park, W. Sakumoto, J. Steinman • University of Washington • H. Berns, R. Gran and Jeff Wilkes

  21. Proton beam transport Target Station 130m decay pipe 280m m-pit Near detector US B280 Activities Combined function Superconducting Magnet R&D And Corrector Coil construction (BNL) CT Proton Beam Monitor (LSU) Proton Beam Monitor Electronics (Washington) Neutrino Horns and Target R&D and Horn 2 construction (Colorado) Target Testing (BNL, Stony Brook) GPS Time Synchronization (Washington) ND280 Off-axis Fine Grained detector P0D (Rochester, Stony Brook, Washington) SMRD (LSU) Software/Physics Simulation

  22. Superconducting Corrector Coil • Unique facility in BNL • direct coil winding on the beam pipe BNL Serpentine Design • automatic cancellation of the non-uniform end fields!

  23. Completed Corrector Prototype • Completed and successfully • tested this spring • now at KEK • to be used as a spare • propose to build 4 more

  24. T2K Neutrino Horn 2 U. Of Colorado and Bartoszek Engineering Eric Zimmerman of U. of Colorado has experience with the MiniBooNE and NuTeV neutrino horn systems  participates in the T2K target and horn system R&D, engineering and design; proposes to build Horn2 at CU w/ Bartoszek Engineering

  25. ND 280m Detector Requirements • On-axis (0o) • Monitor neutrino beam direction and stability • Measure neutrino flux • Relatively simple detector • Off-axis (~2o) • measurenm and ne neutrino fluxes and the spectra. • study n interaction (CC-QE, non-QE, p0, ) • candidate detector designs considered for FGD • Only carbon target: scintillator bar detector (K2K Scibar) • Active oxygen target (water+liquid scintillator+WLS fiber) • Thin passive oxygen (water) target with sampling cal/tracking  US Interest: experience with the D0 preshower detector (Stony Brook) and the MINERvA (Rochester)

  26. ECAL SMRD in UA1 Magnet Yokes Up/Central ECAL Charged Particle Tracking P0D Fully Active Target P0D Water Rich Target ND280 Off-axis Detector

  27. P0D Layers Water + “Carbon” Target “Carbon” Target MCP-MAPMT Water = (Water + “Carbon”) - (“Carbon”) white: scintillator, mesh: water, red: lead foil

  28. “Carbon” Water Gamma Ray Reconstruction • High Recon. Eff. • > 80% for Eγ > 100 MeV • 70% at Eγ = 50 MeV • Efficiency uniform over volume • EM Energy Resolution • 10% + 3%/sqrt(GeV) 200 MeV Efficiency vs Z position in P0D

  29. Activity in ECAL P0D NC π˚ Reconstruction • Require • No μ/π track • “Separated” Showers in P0D • Projected vertex in Fid. • Eff. > 50% above 200 MeV/c • Bkgd from CC events ~ 20 % • All BKGD events have a pizero • Expect ~8000 reconstructed π˚ per year 440 MeV/c π˚

  30. Summary of the T2K US B280 CollaborationProposed Contributions to T2K

  31. Conclusions • T2K Beamline and ND280 are already approved and funded (~$160M) in Japan • Beamline construction underway • First beam expected on target April 1, 2009 • US B280 collaboration proposes a modest contribution (<$5M) to critical components of the beamline & ND280 • Strong partnership developed between Japanese and US leadership through K2K and SuperK • Provide strong intellectual and organizational contributions • US is well positioned to participate in the forefront science of the T2K experiment with a modest investment • A formal proposal will be submitted to DOE in June 2005

  32. The End

  33. T2K Sensitivity to q13as a function of CP-phase d (q12 contribution subtracted)

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