Status of J-PARC Neutrino Project - kobayasi/talks/ (OAB 2.5 deg, 1 yr, 22.5

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Transcript of Status of J-PARC Neutrino Project - kobayasi/talks/ (OAB 2.5 deg, 1 yr, 22.5

  • 1T.Kobayashi (KEK)

    Status of JStatus of J--PARC Neutrino ProjectPARC Neutrino Project T2K (TokaiT2K (Tokai--toto--KamiokaKamioka))

    Takashi Kobayashi (KEK)

    NBI05@FNAL Jul. 7, 2005

    Contents 1.T2K experiment 2.Facility and Status 3.Summary

  • 2T.Kobayashi (KEK)

    ~1GeV νμ beam (×100 of K2K)

    Tokai

    T2K experimentT2K experiment

    Physics goals Discovery of νμ→νe appearance Precise meas. of disappearance νμ→νx

    Kamioka

    J-PARC 0.75MW 50GeV PS

    Super-K: 50 kton Water Cherenkov

    Phase2: 4 MW

    Phase2: Hyper-K

    Long baseline neutrino oscillation experiment from Tokai to Kamioka.

    12 countries ~60 institutions

    ~180 collaboratorsDiscovery of CP violation (Phase2)

  • 3T.Kobayashi (KEK)

    θTargetHorns Decay Pipe

    Super-K.

    π decay Kinematics

    OA3°

    OA0° OA2°

    OA2.5°

    Statistics at SK (OAB 2.5 deg, 1 yr, 22.5 kt) ~ 2200 νμ tot ~ 1600 νμ CC νe ~0.4% at νμ peak

    Quasi Monochromatic Beam x 2~3 intense than NBB

    Tuned at oscillation maximum

    Narrow intense beam: OffNarrow intense beam: Off--axis beamaxis beam 振動確率@ Δm2=3x10-3eV2

    ν μ flu

    x

    0° 2°

    2.5° 3°

    E ν

    (G eV

    )

    1

    0 0 2 8 pπ (GeV/c)

    5

    First Application (ref.: BNL-E889 Proposal)

  • 4T.Kobayashi (KEK)

    Eνrec(GeV)

    Signal+BGSignal+BG

    BGBG

    0 1 2 30

    10

    20

    30

    40

    Sensitivity: Sensitivity: ννee appearanceappearance

    ( )νμ θθ ELmP e /27.1sin2sinsin 2132132232 Δ⋅⋅≈→ Discovery of νe appearance (θ13,Δm13)

    (Pe, θe)

    1010--11

    CHOOZCHOOZ excludedexcluded

    Δ m

    1 3

    2 (e

    V 2 )

    1010--44

    1010--33

    1010--22

    sin22θ13 1010--221010--33 1010--11 11

    ~20~20

    W/ 10% error for BG subtraction

    sin22θ13 >0.006(90%)

    νe

    p

    e

    4

    OA2o 5years

    7

    Δm2 = 3x10-3eV2

    sin22θ13 = 0.1

    Assuming sin2θ23=0.5, δ=0, no matter

  • 5T.Kobayashi (KEK)

    δδ(sin(sin22 22θθ))

    δδ((ΔΔmm22))

    Sensitivity:Sensitivity: ννμμ→→ννμμ disappearancedisappearance

    norm (+5%) NQE (+5%) ESK (+1%) beam shape (±20%) beam width (5%)

    Stat. error

    Stat. only

    --68%CL (Δln L=0.5) --90%CL (Δln L=1.36) --99%CL (Δln L=3.32)

    Effect of systematic error on param meas.

    Goal δ(sin22θ23)~0.01 δ(Δm232)~

  • 6T.Kobayashi (KEK)

    Materials and Life Science Experimental Facility

    Hadron Beam Facility

    Nuclear Transmutation

    JJ--PARC FacilityPARC Facility

    J-PARC = Japan Proton Accelerator Research Complex Joint Project between KEK and JAERI

    3 GeV Synchrotron (25 Hz, 1MW)

    Linac

    (350m)

    50 GeV Synchrotron

    (0.75 MW)

    500 m

    Neutrino to Kamiokande

  • 7T.Kobayashi (KEK)

    Location of JAERI at TokaiLocation of JAERI at Tokai--village village

    TOKYO

    KEK

    JAERI

    NARITA

    KAMIOKA

    Tokai-village

    Tsukuba

    JAERI=Japan Atomic Energy Research Institute

    60 km

    Narita

    Kamioka

    Tokyo

    KEK

  • 8T.Kobayashi (KEK)

    January, 2005

    JJ--PARC statusPARC status

    •Buildings for LINAC and 3GeVPS finished. •North-east part of tunnel for 50GeVPS finished. •South-west part of tunnel will finish in FY2006. •First beam on 50GeV PS

    in FY2008

    January, 2005

    Fast ext. part

  • 9T.Kobayashi (KEK)

    decay volume

    Near detector

    Target Station

    Beam dump/μ-pit28 0m

    13 0m

    Neutrino Beam Line for T2K ExperimentNeutrino Beam Line for T2K Experiment

    ComponentsComponents Primary proton beam line Target/Horn system Decay pipe (130m) Beam dump muon monitors Near neutrino detector

    Special FeaturesSpecial Features Superconducting Superconducting combined functioncombined function magnetsmagnets OffOff--axis beamaxis beam

    To Super-Kamiokande

  • 10T.Kobayashi (KEK) Jan.28, 2005

    Fast extra

    ction part

    Fast extra

    ction part

    Ring orbit

    Fast ex t. beam

    Decay Volume (excavated)

    3NBT

  • 11T.Kobayashi (KEK)

    F H 1F

    Q 1

    PD1 1.92 deg. bend

    PC4PQ5 PH3

    PC3 PQ3 PQ4

    PV2 PC2

    PC1 1.92 deg. bend

    PD2PV1

    引き出し基準点 x=49615028.58, y=69561283.94

    ニュートリノ・ビームライン

    PQ2A PQ1

    PH1PH2

    サスペンシ ョン型

    クレーン(2 0t x 2)

    FV 2

    FQ 4

    FV 1

    FQ 3

    FH 2

    FV 2

    FQ 2

    Proton beam lineProton beam line

    Prepara tion sec

    tion

    Normal c onducting

    magnets

    Arc Section 84.5o, R=105m, Super conducting magnets

    Final Focusing Section

    Normal conducting magnets

    Specifications 0.75MW, 50 GeV (40GeV@t=0) Single turn fast extraction Cycle: 3.5 second 3.3x1014 protons/spill 8 bunches/4.2μs ε=6π mm.mr, Δp/p=0.31% (ε=7.5π mm.mr,Δp/p=0.36%@40GeV)Target station

    58ns598ns

    4.2μs

    0.12s injection

    1.9 6s

    ac ce

    ler ati

    on 0.7s

    0.7s idling

  • 12T.Kobayashi (KEK)

    Normal conducting magnetsNormal conducting magnets

    • 22 magnets in prep sect and FF sect. – Mineral Insulation Cable (MIC) for magnets > 1MGy/yr,

    Other: Polyimide insulation – At high radiation area, quick maintenance mechanism

    needed. • Status

    – Development of quick maintenance system in progress as common technologies for ν and hadron facility

    – Engineering design with FEM done for preparation section – Started procurement of cables and irons for prep. sect.

    ビーム振り下げ

    FH 1F

    Q1 PD1 1.92 deg. ben

    d

    PC4PQ5 PH3

    PC3 PQ3 PQ4

    PV2 PC2

    PC1 1.92 deg. b end

    PD2PV1

    引き出し基準点 x=49615028.58, y=69561283.94

    ニュートリノ・ビームライン

    PQ2A PQ1

    PH1PH2

    サスペンシ ョン型

    クレーン(20 t x 2)

    FV 2

    FQ 4

    FV 1

    FQ3 FH2

    FV 2

    FQ 2

    Dipole Quad. Steer. Total (MIC) 12 (5)

    (0?) (5?)

    10 22

    3(H)+2(V) 2(H)+2(V)

    Total 4 9 9

    Prep. 2(H) 5 FF 2(V) 4

    Preparation section

    Final focusing section

    Tanaka-san’s talk

  • 13T.Kobayashi (KEK)

    Superconducting magnetsSuperconducting magnets • Combined function magnets in arc part

    – Dipole Field: 2.587 T, Quad. Field: 18.62 T/m

    – Reduce cost while keeping large acceptance

    – Use common parts with LHC to reduce cost/risk

    • First full size prototype completed – Cooled, current loaded – 7700A (ope. curr. @50GeV + 5%)

    achieved w/o any spontaneous quenching

    • Contract for mass production made. Start fabrication soon

    T.Ogitsu, T.Nakamoto, et.al., Cryogenic Sci. Center, KEK

    Prototype coils completed by Oct. 2004

    Feb.21,2005

    ビーム振り下げ

    FH 1F

    Q1

    PD1 1.92 deg. ben

    d

    PC4PQ5 PH3

    PC3 PQ3 PQ4

    PV2 PC2

    PC1 1.92 deg. b end

    PD2PV1

    引き出し基準点 x=49615028.58, y=69561283.94

    ニュートリノ・ビームライン

    PQ2A PQ1

    PH1PH2

    サスペンシ ョン型

    クレーン(20 t x 2)

    FV 2

    FQ 4

    FV 1

    FQ3 FH2

    FV 2

    FQ 2

  • 14T.Kobayashi (KEK) Vacuum Vessel from Spain

    Shell Welding Completed (Dec21,04)Shell Welding Completed (Dec21,04) Put in vertical cryostat for cooling/current loading test (Feb.21,2005)

  • 15T.Kobayashi (KEK)

    Superconducting magnetSuperconducting magnet

    2.0

    (kA)

    1.0

    3.0

    0.0

    8.0

    7.0

    6.0

    5.0

    4.0

    1.0 Manual Shut down

    Time

    50GeV(7345A)

    40GeV(5830A)

    3.0

    2.5

    2.0

    1.5

    1.0

    0.5

    0.0

    B 1 (

    T )

    -4000 -3000 -2000 -1000 0

    position (mm)

    25

    20

    15

    10

    5

    0

    B 2 (T

    /m )

    B1 B2

    Position (mm)

    D ip

    o le

    f ie

    ld (T

    )

    19.0T/m2.68T

    Q u ad

    ru p o le

    f ie

    ld (

    T /m

    )

    7700A @ 5A/s

    Prototype magnet worked •as designed •without quench Another “proof model” worked

    @7460A

  • 16T.Kobayashi (KEK)

    FF Target Station

    ν beam

    Arc

    PS

    I,C,P

    C,P

    C,P

    I,C,P

    C,P

    C,P

    C,P

    C,P C,PC,P

    C,P

    P P

    P

    C, P

    C, P

    C, P

    I,C,PI,P

    Target

    FF Target Station

    ν beam

    Arc

    PS

    I,C,P

    C,P

    C,P

    I,C,P

    C,P

    C,P

    C,P

    C,P C,PC,P

    C,P

    P P

    P

    C, P

    C, P

    C, P

    I,C,PI,P