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  • *A Joint Proposal for US-Japan Cooperation Program Proposal to JSPS US-Japan collaboration fundR&D of superconducting magnet technology for high intensity muon beam lineKEK ARL, Cryogenics Science CenterT. Ogitsu, N. Kimura, T. Nakamoto, K. Sasaki, K. Tanaka, A. Yamamoto, IPNS, Cryogenics GroupY. Makida, T. Okamura

    FNALTechnical Div.M. Lamm, A. Zlobin, V. Kashikhin, E. Barzi, S. Feher, J. Tompkins

  • Term2009~2014Phase I (mainly 2009~2011)Near term Projected for Mu2e and COMETPhase II (mainly 2011~2014)Long termProjected for future high intensity muon beam lineEventually for Neutrino Factory and Muon Collider

  • Phase I R&DMu2eCOMETPion Capture SolenoidR&D forMu2e and COMETRequirementHigh FieldMore pion to captureMore (better) conductorLarger stored energy ~5T for COMET and Mu2eHigh Radiation High Power BeamHeat LoadRadiation Damage~10 W for COMET

  • High yield strength Al stabilized conductorNbTi base for field up to 5 TSuperconductor requires good normal conductor as stabilizer and quench protectionCopper is the standardDensity: 8920 Kg/m3Aluminum is also a good normal conductorDensity: 2700 Kg/m3More transparent against radiationCan provide less heat load with the same stabilization property

  • High Yield Strength Al stabilized Conductor R&DFor High Energy PhysicsHigher Field> 5 TeslaLarger SizeDiameter10m

    Combination of Various Technology

    ATLAS Al Ni AlloyNi-0.5 ~ 1 %CMS-Hybrid Support A6058 -->> A7020

    Y.S.(0.2%) = 400 MPaRRR = ~ 400

  • *An R&D Work using ATLAS-CS Conductor + A6061-T6T.S. is > 50 % reinforced with A6061using Electron Beam, and Laser Beam WeldingLBW may be a potential technology EBW, LBWLaser Beam Welding

  • Phase I R&D: Prototype SolenoidFabricate prototype pion capture solenoidTest itemsMechanical stabilityHeat load stabilityQuench protectionincluding coupling

  • Phase I R&D Plan

    200920102011Conductor R&D Design Proto Conductor Fab.Coil R&D Conceptual Design Proto Coil Fab. Proto Coil TestReal Magnet Detail Design Magnet Production

  • Phase II R&DAim for future high intensity muon beam lineEventually neutrino factory or muon colliderMore MuonHigher Field (20 T and more)Higher Beam Intensity = Higher Heat LoadAdvance conductorNb3Sn, Nb3Al, MgB2, YBCO, BSCCOAluminum stabilizer or aluminum jacket cable in conduit cableStudy on Design Issues associated with using advanced conductor

  • Conductor Choice for Higher Field and Higher Stability

    MaterialTcHc2 ( T= 4.2 K) Mass DensityNb-Ti9 K10 T6000 Kg/m3Nb3Sn18 K28 T7800 Kg/m3Nb3Al18.5 K30 T7200 Kg/m3MgB239 K60 T2500 Kg/m3YBCO90 K> 50 T5400 Kg/m3BSCCO110 K> 50 T6300 Kg/m3

  • A15 (Nb3Al, Nb3Sn)For now the best candidate for high field applicationNb3Sn strandNb3Al strandAl stabilizedNb3Al Conductor(NIFS)

  • Toward Higher Beam PowerCable in conduitRemoval of large heat load

  • MgB2Monel 400 sheathed

    Diameter: 1.13mmComposition MgB2 (Vol %)14.6Fe (Vol %)10.8Cu (Vol %)13.8Ni (Vol %)15.8Monel 400 (Vol %)45.0Cost: 3/m Commercial products are now being available.Low field performances are good up to 20 K, 2 THigh field field performance are under development

  • High Tc Conductors22 T already achievedPossibility to go beyond

    Chart1

    6684.8664688427361736174900

    5576.3798219585296429644249.21875

    4644.1543026706235323533521.875

    3873.8278931751174717472909.375

    3222.3145400594113811382679.6875

    2670.02967359055305302450

    22002552552373.4375

    1791.33531157272220.3125

    1427.06231454012070

    1124.15430267062010

    852.58160237391950

    629.31750741841890

    4401830

    362.96735905041760

    289.85163204751700

    229.79228486651640

    177.56676557861580

    Nb3Sn (4.2K)

    BSCCO2212 (4.2K)

    NbTi (1.8K)

    NbTi (4.2K)

    As of year 2000

    B(T)

    Jc(A/mm2)

    Performance of 0.8 mm dia wire

    Sheet1

    Sheet1

    6684.8664688427361736174900

    5576.3798219585296429644249.21875

    4644.1543026706235323533521.875

    3873.8278931751174717472909.375

    3222.3145400594113811382679.6875

    2670.02967359055305302450

    22002552552373.4375

    1791.33531157272220.3125

    1427.06231454012070

    1124.15430267062010

    852.58160237391950

    629.31750741841890

    4401830

    362.96735905041760

    289.85163204751700

    229.79228486651640

    177.56676557861580

    Nb3Sn (4.2K)

    BSCCO2212 (4.2K)

    NbTi (1.8K)

    NbTi (4.2K)

    As of year 2000

    B(T)

    Jc(A/mm2)

    Performance of 0.8 mm dia wire

    Sheet2

    6684.86646884273617361720704900

    5576.37982195852964296420104249.21875

    4644.1543026706235323533521.875

    3873.8278931751174717472909.375

    3222.3145400594113811382679.6875

    2670.02967359055305302450

    22002552552373.4375

    1791.33531157272220.3125

    1427.06231454012070

    1124.15430267062010

    852.58160237391950

    629.31750741841890

    4401830

    362.96735905041760

    289.85163204751700

    229.79228486651640

    177.56676557861580

    Nb3Sn (4.2K)

    BSCCO2212 (4.2K)

    NbTi (1.8K)

    NbTi (4.2K)

    As of year 2000

    B(T)

    Jc(A/mm2)

    Performance of 0.8 mm dia wire

    Sheet3

  • IssueNeeds stabilizer for stability and quench protectionNeed large conductor for higher operation current, i.e. less inductanceAluminum stabilizer?Aluminum jacket cable in conduit?Hybrid magnet structure for efficiency

  • R&D Schedule & Budget

    200920102011201220132014Phase I Conductor R&D20MJYenProto Coil

    25MJYenProto Coil Test10MJYenProto Coil Test2MJYenTest Analysis1MJYenTest Analysis1MJYenPhase IIConductor Basic R&D5MJYenConductor Basic R&D5MJYenConductor R&D20MJYenProto Cond.Fab.28MJYenProto Coil Fab.29MJPYenProto Coil Test20MJYenCont.10MJYen5MJYen5MJYen5MJYen5MJYen4MJYenTravel3MJYen3MJYen3MJYen3MJYen3MJYen3MJYenTotal38MJYen38MJYen38MJYen38MJYen38MJYen28MJYen

  • Other staff

    Transport SolenoidR&D at KEK

  • J-PARC Muon Beam LineField; ~2TAparture; ~0.4 mLimited Access to shielded areaRefrigerator must be outside of shieldLimited Space for the refrigeratorsLong distance to cold head to coil frontConduction Cooling with Higher Temperature

  • Trial Winding of Curved Section with MgB2 conductorPurchase two kinds of MgB2 conductor from Columbus SC1 is the 1.13 mm diameter round wireWill be wound by a company2 is the 1.5 * 2.5 mm square wireWill be wound by Nakahara and Adachi at KEKThey will be wound this winter and Tested in next springR&D Coil made at KEK in houseNbTiAlready woundTest just startedMgB2 version is also planned

  • R&D on Transport SCSolenoid Coil by company will be wound till Mar.R&D on trim dipole coil

    ******