LARP magnet R&D program Giorgio Ambrosio TD/MSD

1. FNAL Annual Program Review September 07 LARP magnet R&D program Giorgio Ambrosio TD/MSD • OUTLINE • LARP goals • FNAL contribution to LARP • FNAL core-program support to LARP

2. LARP magnet R&D (FNAL, BNL, LBNL) • From start to FY07: focus on R&D • From FY08: focus on “projectized” tasks LARP goals “ The US LHC Accelerator Research Program enables U.S. accelerator specialists to take an active and important role in the LHC accelerator during its commissioning and operations, (…) and to be a major collaborator in LHC performance upgrades”(mission statement) Form FY08 Org Chart G. Ambrosio - LARP magnet R&D program

3. LARP 2009 Milestone LARP has a very challenging milestone at the end of 2009 “Demonstrate that Nb3Sn magnets are a viable choice for an LHC IR upgrade” 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 G. Ambrosio - LARP magnet R&D program

4. FNAL: TQS coil winding & curing TQS magnet test at 1.9K FNAL: Host lab for TQC magnets FNAL: LQ coil development and fabrication, LQ design with alignment, LQ test at 1.9K 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 •  Long Mirror (LM) addressing long coil & magnet issues • 2 and 4 m long, single cos q coil, Bcoil ~ 11 T FNAL core program task In support of LARP FNAL contribution “Demonstrate that Nb3Sn magnets are a viable choice for an LHC IR upgrade” •  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 G. Ambrosio - LARP magnet R&D program

5. Aluminum shell 4 pads Yoke Keys Filler Bladder 2 layers FNAL: coils fabric, test at 1.9K FNAL: concept, design, development, coils fabric., assembly & test Technological Quadrupoles Two mechanical designs are under development Same coils / Aperture = 90 mm / Gradient > 200 T/m @ 4.2K TQC: using collars Collar laminations from LHC-IR quads 1st time applied to Nb3Sn coils TQS: using Al-shell Pre-loaded by bladders and keys 1st time applied to shell-type coils G. Ambrosio - LARP magnet R&D program

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 techn. is mostly based on FNAL technology • All coils (29) for the 1st magnet series have been wound and cured at FNAL, reacted and impregnated at LBNL; • TQC02 coils completely fabr. at FNAL G. Ambrosio - LARP magnet R&D program

7. 44GPa Elasticity Plasticity TQC Development • New FEM analysis with Nb3Sn plasticity (1st in the field) • Four mechanical models have been assembled and tested in order to develop collaring procedure for Nb3Sn coils Stress strain plot showing plastic-elastic behavior of coil samples Stress in different longitudinal sections during keys insertion: uniform within +/- 5 MPa G. Ambrosio - LARP magnet R&D program

8. TQS02 (with RRP 54/61 coils) assembled at LBNL, tested at FNAL, reached ~215 T/m at 4.5 K TQCs Status and Plans TQC01: • 70% at 4.5K • 85% at 1.9K • Damage during test TQC01b training history TQC01b: Re-assembly with 2 TQS coils • 85% ssl at 4.5 K • 89% at 1.9 K • Reached G = 200 T/m  Constant improvement in understanding and process control TQE02: TQC with TQS02 coils • To be tested early Oct G. Ambrosio - LARP magnet R&D program

9. LARP Long Racetracks BNL, LBNL, FNAL FNAL Long Mirrors FNAL 2006 2007 2008 2009 LARP LQ Design Study LARP TQs 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 G. Ambrosio - LARP magnet R&D program

10. From 0.3 m to 3.6 m LARP Long Racetrack • Results: • Iq> 90% ssl • Shell should ..be segmented 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 structureDeveloped at LBNL (preloaded using bladders and keys) FNAL contributions: L2 coordination of Supporting R&D (G. Ambrosio) FNAL scientists and engineers are part of LR working group Technology transfer from the LR to the LQ, Insulation development, Practice coil insulation Coil layout: two flat double-layer racetrack coils Technology developed at LBNL, modified at FNAL, successfully transferred to BNL G. Ambrosio - LARP magnet R&D program

11. SSL FNAL Long Mirror • FNAL “Mirror magnet” is a cos-theta dipole where a coil is substituted by iron blocks • Successful 2m mirror magnet (same performance of 1m model) • 4m mirror magnet will be tested in November LM02 quench history at 4.5K compared with 1m model Front view of 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, …) G. Ambrosio - LARP magnet R&D program

12. LQ plans Present plan (still under development): • LQ project leadership – FNAL • LQ coil winding & curing – FNAL • LQ coil reaction & impregnation – FNAL & BNL • LQ support structure with shell – LBNL & BNL • LQ support structure with coil alignment – FNAL • LQ quench protection – FNAL & LBNL & BNL • LQ magnet tests – FNAL & BNL G. Ambrosio - LARP magnet R&D program

13. Other parts of LARP magnet R&D • FNAL has a major role in Design Studies: • LARP L2 coordinator (Zlobin) • LARP Long Quadrupole DS task leader (Ambrosio) • Tasks: High Grad Quad, IR Study, Radiation deposition, Cryogenics, Heat transfer 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 in different conditions (pressure, field, temperatures) • … also in Magnet testing: • LARP magnet integration coordination • Only LARP lab with 1.9K capability • Developed low-noise high-frequency spike detection system G. Ambrosio - LARP magnet R&D program

14. Budget and Resources FY07 resources: 5 physicists 8 engineers 2 designers 9 technicians + support. staff (~21 FTEs) Budget with G&A • The LARP budget is almost constant (+10%) • In FY08 the Core Program budget is decreasing because the Long Mirror is phasing down ( low M&S, lower SWF); some FTEs to other magnet programs • In FY09 the Core Program budget is back to $4.6M in preparation for IRUP • 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 G. Ambrosio - LARP magnet R&D program

15. Conclusions • LARP is starting an exciting and challenging phase • Goal: demonstrate that Nb3Sn magnets are viable option for an LHC IR upgrade • FNAL is supporting all LARP goals • With key contributions in all tasks • technical and managerial level • With unique contributions in several tasks • such as 1.9K magnet test capability, long coil winding and curing, coil collaring, conductor characterization, … • Has achieved important results (TQC01b) • FNAL is providing further support by core-program • Long Mirror magnets, Conductor R&D G. Ambrosio - LARP magnet R&D program

16. LARP Mission Statement The US LHC Accelerator Research Program enables U.S. accelerator specialists to take an active and important role in the LHC accelerator during its commissioning and operations, and to be a major collaborator in LHC performance upgrades. In particular, LARP will support U.S. institutions in LHC commissioning activities and accelerator science, accelerator instrumentation and diagnostics, and superconducting magnet R&D to help bring the LHC on and up to luminosity quickly, to help establish robust operation, and to improve and upgrade LHC performance. Furthermore, the work we do will be at the technological frontier and will thereby improve the capabilities of the U.S. accelerator community in accelerator science and technology to more effectively operate our domestic accelerators and to position the U.S. to be able to lead in the development of the next generation of high-energy colliders. G. Ambrosio - LARP magnet R&D program

17. LARP FY07 Org Chart FY07 Org Chart G. Ambrosio - LARP magnet R&D program

18. LARP FY08 Org Chart FY08 Org Chart G. Ambrosio - LARP magnet R&D program

19. 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) G. Ambrosio - LARP magnet R&D program