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LARP Magnets

DOE Annual Program Review - May 16-18, 2006. LARP Magnets. Giorgio Ambrosio for the High Field Magnet group. FNAL contribution to LARP (LHC Accelerator Research Program) FNAL core-program support to LARP. SC Magnet R&D at Fermilab.

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LARP Magnets

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  1. DOE Annual Program Review - May 16-18, 2006 LARP Magnets Giorgio Ambrosio for the High Field Magnet group FNAL contribution to LARP (LHC Accelerator Research Program) FNAL core-program support to LARP

  2. SC Magnet R&D at Fermilab • Fermilab has a long (~30 years) and successful history of SC accelerator magnet R&D • Tevatron, Low Beta Quads, SSC dipoles, VLHC superferric transmission-line, LHC IR Quads, HFM dipoles • This is because SC magnets are an enabling technology for high energy accelerators “The tremendous accomplishments of these last two years confirm the broad strength of the group” “In many areas basic elements of the Fermilab program, such as tests of material, establishment of fabrication processes, design and fabrication of tooling and fixtures, are essential to LARP success” Jan 06 - High Field Magnet review (L. Rossi, chair) LARP Magnets - G. Ambrosio

  3. LARP 2009 Milestone The LHC Accelerator Research Program (LARP) has a very challenging milestone at the end of 2009 “Demonstrate that Nb3Sn magnets are a viable choice for an LHC IR upgrade” 1. Milestone set in agreement with CERN •  Technological Quadrupoles (TQ) for performance reproducibility • 1 m long, 90 mm aperture, Gnom > 200 T/m, Bcoil > 12 T •  Long Racetracks and quadrupoles (LQ) addressing long magnet issues • LQs have same features ofTQs 4 m long •  High gradientquadrupoles (HQ) to explore performance limits • 1 m long, 90 mm aperture, Gnom > 250 T/m, Bcoil > 15 T LARP Magnets - G. Ambrosio

  4. FNAL: TQS coil winding & curing FNAL: Host lab for TQCs FNAL: Host lab for LQs FNAL: Design Study task leader FNAL: L2 coordination FNAL: Contribution to all WGs Strand study task leader Magnet test coordination leader Only lab for 1.9K magnet test FNAL: Design Study L2 coordination LARP 2009 Milestone The LHC Accelerator Research Program (LARP) has a very challenging milestone at the end of 2009 “Demonstrate that Nb3Sn magnets are a viable choice for an LHC IR upgrade” 1. Milestone set in agreement with CERN •  Technological Quadrupoles (TQ) for performance reproducibility • 1 m long, 90 mm aperture, Gnom > 200 T/m, Bcoil > 12 T •  Long Racetracks and quadrupoles (LQ) addressing long magnet issues • LQs have same features ofTQs 4 m long •  High gradientquadrupoles (HQ) to explore performance limits • 1 m long, 90 mm aperture, Gnom > 250 T/m, Bcoil > 15 T LARP Magnets - G. Ambrosio

  5. Aluminum shell 4 pads Yoke Keys Filler Bladder 2 layers Technological Quadrupoles Two mechanical designs are under development Same coils / Aperture = 90 mm / Gradient > 200 T/m @ 4.2K TQS: using Al-shell Pre-loaded by bladders and keys 1st time applied to shell-type coils TQC: using collars Collar laminations from LHC-IR quads 1st time applied to Nb3Sn coils LARP Magnets - G. Ambrosio

  6. Ceramic binder for insulation, water-jet technology for end-parts, reaction procedure with azimuthal and pole gaps, segmented tooling with “gentle-transfer” procedure, splice design and procedure Water Jet Machined Part TQ Coil Fabrication • TQ coil fabrication technology is based on FNAL techn. • All coils for the 1st magnet series have been wound and cured at FNAL, reacted and impregnated at LBNL LARP Magnets - G. Ambrosio

  7. TQC Design and Analysis • FNAL has developed TQC design, and performed 2D and 3D magnetic and mechanical analysis 3D magnetic analysis for ends and yoke optimization 3D mechanical analysis for end pre-load optimization: 1st time use of ANSYS birth-and-death capabilities to track epoxy crack propagation Coil stress < 150 MPa at all stages LARP Magnets - G. Ambrosio

  8. TQC Mechanical Models • Four mechanical models have been assembled and tested at FNAL in order to develop collaring procedure for Nb3Sn coils and check all fabrication steps Stress in different longitudinal sections of the model during keys insertion: Stresses are uniform within +/- 5 MPa during all process LARP Magnets - G. Ambrosio

  9. TQs Status and Plans 1st TQC “with collars”: • Coils are ready • Assembly planned to start in mid of May • Test planned in July TQS01 training history Numbers on top show coil where quench started 1st TQS “with Al-shell”: • Tested at LBNL in April • Training started at 80% ssl • Reached G = 190 T/m • ~87% ssl or even more, analysis is in progress LARP Magnets - G. Ambrosio

  10. FNAL Long Mirrors FNAL LARP Long Racetracks BNL, LBNL, FNAL 2006 2007 2008 2009 LARP LQ Design Study LARP Long Quadrupoles FNAL, LBNL, BNL Plan for Length Scale-Up LENGTH SCALE-UP CHALLENGE: No Nb3Sn accelerator magnet longer than 1m has ever been built LARP should make a successful 4m long quadrupole by end of 09 LARP Magnets - G. Ambrosio

  11. From 0.3 m to 3.6 m LARP Long Racetrack The goals of the Long Racetrack (LR) are: to fabricate and test long Nb3Sn racetrack coilsPerformed at BNL to test an Al-shell-based supporting structure (preloaded using bladders and keys)Developed at LBNL FNAL contributions: L2 coordination of Supporting R&D (G. Ambrosio) FNAL scientists and engineers are part of LR working group Sub-task: technology transfer from the LR to the LQ involves FNAL engineers and technicians Coil layout: two flat double-layer racetrack coils Technology successfully developed at LBNL, successfully modified at FNAL, transfer to BNL in progress LARP Magnets - G. Ambrosio

  12. FNAL Long Mirror • FNAL “Mirror magnet” is a cos-theta dipole where a coil is substituted by iron blocks • Plan: 2m – 4m mirror magnets Front view of mirror magnet The plan is to base the scale-up on a well understood design and fabrication technology FNAL successfully fabricated 3 dipoles and 1 mirror magnet • ADVANTAGES - Larger probability of success of the LQ by: • Several features complementary to LRs  Diversity & Risk mitigation • conductor, keystoned cable, insulation, coil shape, use of wedges, mechanical structure, • Start as soon as possible development and qualification of tooling and infrastructure for long magnets at FNAL (New 6-m long oven, …) LARP Magnets - G. Ambrosio

  13. Other parts of SC magnet R&D • FNAL has a major role in Design Studies: • LARP L2 coordinator (Zlobin) • LARP Long Quadrupole DS task leader (Ambrosio) • several scientists involved in different designs (inside and outside LARP) Tests of SQ02 (small quadrupole with racetrack coils) fabricated at LBNL • … also in Material R&D: • Strand R&D task leader (Barzi) • Tests of strands and cables with different materials, in different conditions (pressure, field, temperatures) • … also in Magnet testing: • LARP magnet integration coordinator (Feher) • Only LARP lab with 1.9K capability • Developed low-noise high-frequency spike detection system LARP Magnets - G. Ambrosio

  14. Projected Actual or budgeted Budget and Resources Present resources: 5 physicists 8 engineers 2 designers 9 technicians (~22 FTEs) + support. staff (~27 FTEs) • Present Core Program budget ~$2.5-3M/year and present LARP Magnet R&D budget will allow reaching LARP goals and HFM long term goals • The continuity of the core program allows for continued growth in expertise and infrastructure we are able to respond quickly to the needs of the field LARP Magnets - G. Ambrosio

  15. Conclusions • The SC Magnet R&D program at FNAL is fully engaged in LARP goals and plan with a leading role in several major areas • The core-program is supporting LARP offering risk mitigation and diversity • The Long Quadrupoles (2009 deadline) and future prototypes to demonstrate the possibility of a high-luminosity LHC-IR upgrade will be built at Fermilab “We understand and feel our responsibility, we are doing all possible efforts to accomplish this mission!” LARP Magnets - G. Ambrosio

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