us participation in the t2k beamline and the 280 m near detector
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Chang Kee JungNuSAG, June 05
US Participation in
The T2K Beamline and the 280 m Near Detector
First NuSAG Meeting, Washington D.C.First NuSAG Meeting, Washington D.C.June 1, 2005June 1, 2005
Chang Kee JungChang Kee JungState University of New York at Stony BrookState University of New York at Stony Brook
for the T2K US B280 Collaborationfor the T2K US B280 Collaboration
Chang Kee JungNuSAG, June 05
T2K (Tokai to Kamioka)T2K (Tokai to Kamioka)
0.75 MW 50 (40) GeV PS off-axis beam:
(2.5o nominal, 2o~3o coverage) ~1GeV energy
→ → ee appearance
→ → xx disappearancem2
23) ~ 104 eV2 and(sin2223 ) ~ 0.01NC measurementNeutrino interaction studies
First long baseline neutrino oscillation experiment proposed to measure Project approved by the Japanese Government in Dec. 2003 Data taking will start in Apr. 2009
Chang Kee JungNuSAG, June 05
T2K Experiment and Detector ComplexT2K Experiment and Detector Complex
targ
et
deca
y vo
lum
e
beam
line
muo
n m
onito
rN
D28
0
2km
det
ecto
r
Supe
rK
T2K Scope
Approved in Japan
US B280 Proposal
Not yet approved
US 2km Proposal
Two separate
US proposals
Chang Kee JungNuSAG, June 05
J-PARC Accelerator ComplexJ-PARC Accelerator Complex
(200 MeV)
(40 GeV)
Chang Kee JungNuSAG, June 05
T2K Neutrino Beamline at J-PARCT2K Neutrino Beamline at J-PARC
Chang Kee JungNuSAG, June 05
Offaxis Beam - Narrow Intense BeamOffaxis Beam - Narrow Intense Beam
Chang Kee JungNuSAG, June 05
280m Near Detector (ND280)280m Near Detector (ND280)
Chang Kee JungNuSAG, June 05
T2K Sensitivity on T2K Sensitivity on
Chang Kee JungNuSAG, June 05
Changes since LOI and Changes since LOI and Updated SensitivityUpdated Sensitivity
LOI (2003)
Current
Beam Energy
50 GeV
40 GeV
Off-axis Angle
2o 2.5o
Decay Vol Length
80 m 130 m
Horn Configuration
Re-optimized
slight reduction in the statistics
and slight increase in the ebackground
0.01 sin2213
10-3
10-2
Chang Kee JungNuSAG, June 05
Sensitivity to Sensitivity to ee appearance appearance
Chang Kee JungNuSAG, June 05
Muon-neutrino DisappearanceMuon-neutrino Disappearance
Chang Kee JungNuSAG, June 05
Design and Construction StatusDesign and Construction Status
Chang Kee JungNuSAG, June 05
Chang Kee JungNuSAG, June 05
Combined Function Combined Function Superconducting MagnetsSuperconducting Magnets
RHIC dipole RHIC quad
R&D Funded by U.S.-Japan CollaborationWork in JFY03 ~$150k @BNLFinal design (KEK)
Combined Function Bend and focus
Original plan20 SC dipoles + 20 SC quads
BNL and Stony Brookreevaluation
28 combined function SC magnetscost savingscoupled dipole+quad require correctors
Chang Kee JungNuSAG, June 05
Target and Horn SystemTarget and Horn System
Target:2.6MJ in 5msAluminum cannot withstand.Only low-Z material such as graphite or beryllium.
1st Horn 2nd Horn 3rd Horn
Targetbeam
High intensity beam Larger inner conductor diameter higher current & three horns
Beam Characteristics: 4.2 s pulses in every 3.5 s8 (58 ns) bunches/pulse3 x 1014 protons/pulse
Chang Kee JungNuSAG, June 05
Decay VolumeDecay Volume
Chang Kee JungNuSAG, June 05
Decay Pipe ConstructionDecay Pipe Construction
Chang Kee JungNuSAG, June 05
T2K ScheduleT2K Schedule
Chang Kee JungNuSAG, June 05
T2K International Collaboration T2K International Collaboration and its Organizationand 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
Chang Kee JungNuSAG, June 05
Proposed US Contributions to the Proposed US Contributions to the T2K Neutrino Beamline and ND280 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
Chang Kee JungNuSAG, June 05
T2K US B280 CollaborationT2K 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
Chang Kee JungNuSAG, June 05
US B280 Activities US B280 Activities
decay pipe
Near detector
TargetStation
-pit280m
130m
Combined function
Superconducting Magnet R&D
And Corrector Coil construction (BNL)
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
CT Proton Beam Monitor (LSU)
Proton Beam Monitor Electronics (Washington)
Chang Kee JungNuSAG, June 05
Superconducting Corrector CoilSuperconducting Corrector Coil
Unique facility in BNL direct coil winding on the beam pipeBNL Serpentine Design automatic cancellation of the non-uniform end fields!
Chang Kee JungNuSAG, June 05
Completed Corrector PrototypeCompleted Corrector Prototype
Completed and successfully tested this spring now at KEK to be used as a spare propose to build 4 more
Chang Kee JungNuSAG, June 05
T2K Neutrino Horn 2T2K 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
Chang Kee JungNuSAG, June 05
ND 280m Detector RequirementsND 280m Detector Requirements
• On-axis (0o)– Monitor neutrino beam direction and stability
– Measure neutrino flux
– Relatively simple detector
• Off-axis (~2o)– measure and e neutrino fluxes and the spectra.
– study interaction (CC-QE, non-QE, 0, )
– candidate detector designs considered for FGD
þ Only carbon target: scintillator bar detector (K2K Scibar)
þ Active oxygen target (water+liquid scintillator+WLS fiber)
þ Thin passive oxygen (water) target with sampling cal/tracking
US Interest: experience with the D0 preshower detector (Stony Brook) and the MINERvA (Rochester)
Chang Kee JungNuSAG, June 05
ND280 Off-axis DetectorND280 Off-axis Detector
~ 3mUp/CentralECAL
P0D Water Rich Target
P0D Fully Active Target
~ 2.5mCharged Particle
Tracking
ECAL
SMRD in UA1 Magnet Yokes
Chang Kee JungNuSAG, June 05
P0D LayersP0D Layers
Water + “Carbon” Target
“Carbon” Target
white: scintillator, mesh: water, red: lead foil
Water = (Water + “Carbon”) - (“Carbon”) MCP-MAPMT
Chang Kee JungNuSAG, June 05
Gamma Ray ReconstructionGamma 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)
Water “Carbon”
Efficiency vs Z position in P0D
200 MeV
Chang Kee JungNuSAG, June 05
P0D NC P0D NC ππ˚ Reconstruction˚ 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˚
Activity in ECAL
Chang Kee JungNuSAG, June 05
Summary of the T2K US B280 Summary of the T2K US B280 CollaborationCollaboration
Proposed Contributions to T2KProposed Contributions to T2K
Item Base Cost (k$) Contingency (%) Subtotal (k$)
SC Corrector Coil 338 16 513
CT Proton Beam Monitor 104 25 132
Proton Beam Monitor Electronics 25 40 35
2nd Neutrino Horn 632 31 836
GPS System 88 21 106
ND280 P0D 1,851 49 2762
ND280 SMRD 222 44 320
Total Project Cost (TPC) 3260 39 4704
Chang Kee JungNuSAG, June 05
ConclusionsConclusions
• 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
Chang Kee JungNuSAG, June 05
The EndThe End
Chang Kee JungNuSAG, June 05
T2K Sensitivity to T2K Sensitivity to 1313 as a function of CP-phase as a function of CP-phase
((1212 contribution subtracted) contribution subtracted)
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