LARP Magnet Program by delontewest

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									US LHC Accelerator Research Program
                bnl - fnal- lbnl - slac




 LARP Magnet Program


            S. Gourlay

    LARP Collaboration Meeting
           Napa, CA
         October 19, 2004
                                             Directives

DOE Guidance
“It is our firm intention that the LARP activities serve to explore the limits
    of the technologies described herein. While the end products of LARP
    will be applied to the LHC, LARP is not intended to be an engineering
    an construction service organization to that facility.”

“The LARP is not intended to replace existing base program support at
  the various laboratories in superconducting magnet development and
  other ongoing areas.”

LARP Proposal
“have fully developed and proven accelerator-ready magnet designs,
  ready for production, by about 2012, as required to support the LHC
  physics program.”

LARP Collaboration Meeting October 2004   LARP Magnet Program – S. Gourlay   2
                                 Magnet Program Goals

• Improve long-term physics research opportunities of the LHC by
  providing magnet options for an LHC luminosity upgrade

              Large aperture, high gradient quadrupoles (main emphasis)

              High-aspect ratio, large aperture separation dipoles

• Deliverables will be a successful R&D program, leading to
  accelerator-ready magnet design(s) (production magnets are out of
  scope)

• Develop a collaborative environment between US national labs

• Develop world-wide collaboration on high field magnets



LARP Collaboration Meeting October 2004   LARP Magnet Program – S. Gourlay   3
                    Program Elements and Timeline

“Three-year plan” to focus initial effort (FY05 – FY07)

Must include development of technology for future US projects

But . . . be conservative and focused enough to meet LHC goals.

Start aggressively
   evaluate status and the challenge ahead

    FY05                                           FY08                      FY10   FY12
             Research
                                                          Focused Development Prototype
             Technology Base-Building




LARP Collaboration Meeting October 2004   LARP Magnet Program – S. Gourlay                 4
                        Goals of the Three-Year Plan

Assess challenges

    Determine parameter “reach” and scope for development program

              Aperture
              Quads and high aspect ratio dipoles
              Mechanical structures

Provide AP with range of options* and understand trade-offs

*Key to “dipole first” option is a large aperture dipole in high radiation environment




LARP Collaboration Meeting October 2004   LARP Magnet Program – S. Gourlay          5
                                              Aperture
Bigger is better

    IR performance
    Radiation load

90 mm is initial baseline aperture

    Challenging enough!
    Leaves option of 2-layer coil with G > 200 T/m (Operating)

Start with 2 layers of a 4-layer design (TQ1a)

    Affordable in FY05
    Simple cable parameters (2-layer design requires time to study cabling issues)
    Quick start


LARP Collaboration Meeting October 2004   LARP Magnet Program – S. Gourlay       6
                                Gradient As a Function of Bore Size

                                                         Gradient as a function of Bore radius
                            300 300

                                  285
                                                                         Nb3Sn at 1.8K
                                  270

                           tesla 255
0.01    Scale  1                                                                       Nb3Sn at 4.35K
                            m
                                  240
0.01    Scale  2 
0.01    Scale  3 
                                  225

0.01    Scale  4             210

                                  195                                                  NbTi at 1.8K

                                  180
                                                                       NbTi at 4.35K
                                  165
                            150
                                  150
                                        35          40          45               50              55       60
                                        35                       Rbore( Scale) 1000                      60
                                                                        mm
          LARP Collaboration Meeting October 2004         LARP Magnet Program – S. Gourlay
                                                Organization

                    Superconducting
                       Magnets
                                                                        Magnet Steering Committee (MSC)
                           S.Gourlay
                                                                        – Define program, identify tasks
       LBNL
                           BNL
                                              FNAL
                                                                        and assign task managers
                       Representative
   Representative                         Representative

     G.Sabbi             P. Wanderer        A.V.Zlobin                  Lab Representatives
   Lab representatives oversee                                          G. Sabbi, P. Wanderer, Z. Zlobin
   tasks/sub-tasks at host laboratory
                                                                        Lab Management Representatives
           Three Working Groups –
                                                                        S. Gourlay, M. Harrison, R. Stanek
               Design Studies
               Model Magnet R&D
               Supporting R&D



LARP Collaboration Meeting October 2004          LARP Magnet Program – S. Gourlay                            8
                                 Management Structure


      LARP Magnet Program                               Magnet Steering
           S. Gourlay                                     Committee

        Task 1                     Task 2

                                                                               Working Groups
        Task 3                     Task 4

                                                                                           Design Studies
        Task 5

                                                                                           Model Magnets


                                                                                          Supporting R&D




LARP Collaboration Meeting October 2004     LARP Magnet Program – S. Gourlay                          9
                                          FY04 Activities




LARP Collaboration Meeting October 2004     LARP Magnet Program – S. Gourlay   10
                    FY04 Quadrupole Development
• Design Studies
   –Dual-bore
   –Aperture
   –Geometries

• Support Structure
   –Design and hardware




                                                                                                                                      0   22   44


                                                                             0   10   20   30       40




                                                                                                         Rel. field errors (x10E-5)                     Rel. field errors (x10E-5)


                                                                                                0    2 4   6   8 10 12 14 16 18 20
                                                                                                                                               0    2   4   6   8   10 12 14 16 18 20




LARP Collaboration Meeting October 2004   LARP Magnet Program – S. Gourlay                                                                                                              11
                            FY04 Dipole Development
• Based on “Dipole-first” IR design
    –Large aperture, asymmetric
    –Non-cos-theta
    –Split coil geometry
    –High field, high radiation environment




LARP Collaboration Meeting October 2004   LARP Magnet Program – S. Gourlay   12
                       FY04 Sub-scale Development
•Magnet parameters
      –Clear bore 110 mm
                                                           Uses existing coil design
                                                           ~ $25k in additional parts
      –Peak field 11 T
      –Gradient 100 T/m




LARP Collaboration Meeting October 2004   LARP Magnet Program – S. Gourlay              13
                 Racetrack Quadrupole with Sub-scale Coils



                                              Clear bore: 110 mm
                                          Magnet short sample
                                              Iss = 11.4 kA
                                              Bpeak = 11.2 T (in the end)    F┴ F║
                                              Gss = 95 T/m
                                          Stored energy at Iss = 175 kJ
                                          Inductance at Iss = 2.7 mH




                           21 Quenches to 93% of short sample

LARP Collaboration Meeting October 2004   LARP Magnet Program – S. Gourlay           14
                                          FY05 Program

TQ1a – 2/4 layer 90mm quad                                    Open-midplane dipole
              Fabricate and test                                              3-D mechanical design
                                                                              Thermal analysis

                                                              Sub-scale magnets
                                                                              Dipole and/or quad as
                                                                              resources permit
TQ2 – 2-layer 90mm quad
                                                                              Heat x-fer, support
              Engineering design
                                                                              structure, fab, assembly, etc.
Conductor and Cable                                                           Combine with materials
              Conductor procurement*                                          studies?
              Cable R&D
                                                              Long magnet issues
*Conductor Development Program                                                Base program

LARP Collaboration Meeting October 2004    LARP Magnet Program – S. Gourlay                              15
                                  FY05 Task Distribution

TQ1a                                                         Quadrupole Development
      Design/Analysis – LBNL/FNAL                                  Design Studies - FNAL/LBNL
      Winding – FNAL
      Reaction – LBNL                                        Dipole Development
      Impregnation – LBNL
                                                                   Design Studies – BNL
      Assembly – LBNL
      Test – BNL
                                                             Conductor and Cable
                                                                   Measurements – BNL/LBNL/FNAL
Sub-Scale Tests (hold-back victim)                                 Cabling – LBNL
      Fabrication – LBNL/BNL
      Test – BNL




LARP Collaboration Meeting October 2004   LARP Magnet Program – S. Gourlay                        16
                                                   FY06

      – Build and test 2 “more complex” Nb3Sn quadrupole models

      – Include two mechanical structure schemes

      – Build and test a “simplified” open mid-plane Nb3Sn dipole

      – Develop infrastructure for a long coil

      – Conductor and material development

      – Major conductor procurement


LARP Collaboration Meeting October 2004   LARP Magnet Program – S. Gourlay   17
                                          Long Magnet R&D
Very high priority but funding limited

    Infrastructure
                                                                               As proposed at last
          Reaction furnace
                                                                               collaboration meeting.
          Handling
          VPI chamber or fixture                                               Topic for discussion –
                                                                               Can we improve the schedule?
          Materials cost
                                                                               Is there a better way?
FY04, 05 – Study issues (No budget – base program)
FY06 – Infrastructure development
FY07 – Fabrication and test of 3 – 4 m coil (long sub-scale)
       Essential first step
                - cost effective
                - established baseline with sub-scale coils

LARP Collaboration Meeting October 2004     LARP Magnet Program – S. Gourlay                            18
                                          Task Distribution


  3000

  2500

  2000
                                                                               Quads
                                                                               Dipoles
  1500
                                                                               Long Mag
  1000                                                                         Sub-scale
                                                                               Cond/Cable R&D
    500                                                                        Cond Proc

        0
                      FY05                   FY06



LARP Collaboration Meeting October 2004     LARP Magnet Program – S. Gourlay                    19
                                     Three-Year Program




LARP Collaboration Meeting October 2004   LARP Magnet Program – S. Gourlay   20
                    At the end of the “Three-year” plan

            – Some limited participation from CERN

            – CARE program
                                                                             New collaborative
                     Networking activities (ongoing)
                                                                             opportunities
                     NED’s birthday

            – Participation by KEK?

            – Several LARP magnets (new experience base)

            – Conductor progress                                                  New directions?
            – Maybe some LHC operating experience



LARP Collaboration Meeting October 2004   LARP Magnet Program – S. Gourlay                  21
                                          LAPAC Comments
– Recommend concentrating resources on a limited number of options.
  Main effort should be on quadrupoles, and effort on dipoles should be
  limited:
          “Given the limited resources the magnet program must be well focused on
          the most demanding challenge given the present knowledge of the
          luminosity upgrade layouts.”
          “Consequently the red line through the program must be to go from short
          quadrupole models as fast as possible to the first long quadrupole magnet
          and to reduce the parallel tracks to a minimum.”
          “… it may be worthwhile … to select a baseline design and to stick to it for
          the short model and long prototype magnet fabrication.”


    => FY05 program is consistent with LAPAC.
       FY06 program will be tuned based on LAPAC advice as well as
       experience with FY05 program.

LARP Collaboration Meeting October 2004     LARP Magnet Program – S. Gourlay       22
                                   Goals for the Meeting
FY05

• Program details
• Revise and update task sheets

Establish framework for FY06 and FY07 programs

Organization

• WG and MSC meetings
• Videoconferences




LARP Collaboration Meeting October 2004   LARP Magnet Program – S. Gourlay   23
                                             Summary


Proposed funding profile is modest given program goals

      – We must maintain expected funding and base program support in
        order to be successful

The program should integrate and utilize all available program resources

      – Broad-based R&D program to establish a firm technological
        foundation and provide a variety of options

      – Focused development to achieve LHC priorities


LARP Collaboration Meeting October 2004   LARP Magnet Program – S. Gourlay   24

								
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