Gourlay DOE LARP 06

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					                              BNL -FNAL - LBNL - SLAC



               LARP Magnet R&D Overview
                                    Steve Gourlay


                                  DOE LARP Review

                                           FNAL
                                     June 13, 2006




DOE LARP Review, June, 2006          Magnet R&D Overview - S. Gourlay   1
                              US LARP Magnet Program

       Large aperture, Nb3Sn Quadrupoles for LHC Upgrade


                                                                           Length
                              High Performance                             Scale-up
                              Conductor Development
  0.5 mm




                                           90 mm
                                         > 250 T/m



DOE LARP Review, June, 2006             Magnet R&D Overview - S. Gourlay      2
                                  Magnet Program Goals
           Provide options for future upgrades of the LHC Interaction Regions

    Demonstrate by 2009 that Nb3Sn magnets are a viable choice for an LHC IR
     upgrade

       – Focus on major issues: consistency, bore/gradient (field) and length
    1.
            1. Predictable and reproducible performance
                   TQ models (1 m, 90 mm aperture, Gnom > 200 T/m, Bcoil > 12 T)
            2. Long magnet fabrication
                   LQ models (4 m, 90 mm aperture, Gnom > 200 T/m, Bcoil > 12 T)
            3. High gradient in large aperture
                    HQ models (1 m, 90+ mm aperture, Gnom > 250 T/m, Bcoil > 15 T)


    DOE LARP Review, June, 2006         Magnet R&D Overview - S. Gourlay           3
                       Goal #1 Predictable and Reproducible Performance

• Sub-scale Quadrupoles (SQ)
    – Conductor evaluation
    – Analysis validation

• Technology Quadrupoles (TQ)
    – 90 mm aperture
    – Gradient > 200 T/m
    – Explore alternate structures
      using “identical” conductor                           Skin
                                                                        Preload
                                                                        Shim
    – Basis for scale-up
                                                     Yoke
                                                     Gap

                                                                         Collaring
                                                     Yoke                Key

                                                      Control          Collar
                                                      Spacer



 DOE LARP Review, June, 2006        Magnet R&D Overview - S. Gourlay                 4
                              Goal #2 Long Magnet Fabrication


• Long Racetrack
     – Coil fabrication scale-up based on well-understood
       sub-scale coils
     – Explore scale-up of shell-based support structure

• Mirror dipole scale-up via FNAL core program

     Followed by . . .

• Long quadrupole (LQ)
     – 3.6 m quadrupole based on TQ cross-section




DOE LARP Review, June, 2006         Magnet R&D Overview - S. Gourlay   5
                               Goal #3 High Gradient in a Large Aperture


• High Gradient Quadrupole (HQ)                                         4-layer: G=280-310 T/m

      – Explore ultimate performance

            • Increase peak field on the coil to
              ~ 15 T
            • Precursor to larger aperture


                               Subject of Design Studies




 DOE LARP Review, June, 2006              Magnet R&D Overview - S. Gourlay                   6
                                              Target Program


                                            Length   Gradient        Aperture
Model Magnets                       Type                                                FY05   FY06      FY07      FY08   FY09
                                             (m)      (T/m)           (mm)
Series Description
TQ     Technology Quad         Cos-2theta     1        > 200             90                    2N + 1R   2N + 3R    2N
LQ       Long Quad             Cos-2theta     4        > 200             90                                         1N     1N
HQ       High Gradient Quad    Cos-2theta     1        > 250             90                                                2N

Supporting R&D                      Type    Length   Peak Field      Aperture           FY05   FY06      FY07      FY08   FY09
                                             (m)        (T)           (mm)
Series Description
SQ      Sub-scale                   block    0.3      10 – 11           110              1R    1N + 1R   1N + 1R    1N
SRx      Short Racetrack            block    0.3      10 – 12           N/A                      1N        1N       1N
LR       Long Racetrack             block     4       10 - 12           N/A                                2N
N = New Magnet
R = Revised Magnet using existing coils




      DOE LARP Review, June, 2006                    Magnet R&D Overview - S. Gourlay                                7
                              Program Elements and Timeline


  Phase I - initial focus on developing technology base

       Start aggressively

        –     evaluate status and the challenge ahead                            R&D
        –     But . . . be conservative and focused enough to meet LHC goals.


  Phase II – focused development of IR quad


                          Phase I                           Phase II
      FY05                                  FY09                          FY10   FY12
            Research
                                                   Focused Development Prototype
            Technology Base-Building

DOE LARP Review, June, 2006            Magnet R&D Overview - S. Gourlay                 8
                              Magnet Program Flowchart




DOE LARP Review, June, 2006        Magnet R&D Overview - S. Gourlay   9
                                     Snapshot
                 Primary Focus                         Secondary (but very important)

•    Technology Quad (TQ) Program                  •     Design Studies
                                                           – Integrative (cryo, IR, . . .)
      – And supporting activities*
                                                   •     High Gradient Quad (HQ)
•    Long Quad (LQ) Program
                                                           – Addresses future possible
      – And supporting activities*                           requirements
                                                           – Push limits of technology
•    Materials
                                                   •     Rad-hard materials
*Long Racetrack (LR), 3D analysis, cable
     testing, targeted design studies




DOE LARP Review, June, 2006          Magnet R&D Overview - S. Gourlay                        10
                                                      Organization

                                            LARP Magnet Program                                     Magnet Steering
                                                 S. Gourlay                                          Committee

    Design Studies                 Model Magnet R&D                    Supporting R&D                      Materials
      A. Zlobin                       G.L. Sabbi                         G. Ambrosio                       A. Ghosh


Task 1           Task 2            Task 3            Task 4          Task 5             Task 6        Task 7       Task 8


                                                   Test Integration Group
                 Superconducting
                    Magnets
                                                                                        Magnet Steering Committee (MSC)
                                                                                        – Define program, identify tasks and
                      S.Gourlay                                                         assign task managers


                      BNL
                                                                                        Lab Representatives and L2’s
    LBNL                                FNAL
                  Representative
Representative                      Representative                                      G. Sabbi, A. Zlobin, A. Ghosh,
  G.Sabbi           P. Wanderer       A.V.Zlobin                                        G. Ambrosio, S. Gourlay,
                                                                                        P. Wanderer, M. Lamm
  Lab representatives oversee
  tasks/sub-tasks at host laboratory

DOE LARP Review, June, 2006                          Magnet R&D Overview - S. Gourlay                                    11

				
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