LARP magnet R

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FNAL Annual Program Review

• LARP magnet RD program
• Giorgio Ambrosio
• TD/MSD

• OUTLINE
• LARP goals
• FNAL contribution to LARP
• FNAL core-program support to LARP

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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)

• LARP magnet RD (FNAL, BNL, LBNL) strategy
• Start to FY07 focus on RD
• From FY08 focus on projectized tasks

From FY08 Org Chart
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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 gt 200 T/m, Bcoil gt
  12 T
• ? Long Racetracks and quadrupoles (LQ)
  addressing long magnet issues
• LQs have same features of TQs 4 m long
• ? High gradient quadrupoles (HQ) to explore
  performance limits
• 1 m long, 90 mm aperture, Gnom gt 250 T/m,
  Bcoil gt 15 T

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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 gt 200 T/m, Bcoil gt
  12 T
• ? Long Racetracks and quadrupoles (LQ)
  addressing long magnet issues
• LQs have same features of TQs 4 m long
• ? High gradient quadrupoles (HQ) to explore
  performance limits
• 1 m long, 90 mm aperture, Gnom gt 250 T/m,
  Bcoil gt 15 T

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Technological Quadrupoles

• Two mechanical designs are under development
• Same coils / Aperture 90 mm / Gradient gt 200
  T/m _at_ 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
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TQ Coil Fabrication

• TQ coil fabrication techn. is mostly based on
  FNAL technology

• All coils for the 1st magnet series have been
  wound and cured at FNAL, reacted and impregnated
  at LBNL
• TQC02 coils completely fabr. at FNAL

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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 in different longitudinal sections during
keys insertion uniform within /- 5 MPa
Stress strain plot showing plastic-elastic
behavior of coil samples
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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 an
  process control
• TQE02
• TQC with TQS02 coils
• To be tested early Oct

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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
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LARP Long Racetrack

• The goals of the Long Racetrack (LR) are
• to fabricate and test long Nb3Sn racetrack
  coils Performed at BNL
• to test an Al-shell-based supporting structure
  Developed at LBNL
• (preloaded using bladders and keys)
• FNAL contributions
• L2 coordination of Supporting RD (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

• Results
• Iqgt 90 ssl
• Shell should ..be segmented

Coil layout two flat double-layer racetrack
coils Technology developed at LBNL, modified at
FNAL, successfully transferred to BNL
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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, )

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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

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Other parts of LARP magnet RD

• 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

Tests of SQ02 (small quadrupole with racetrack
coils) fabricated at LBNL

• also in Material RD
• Strand RD task leader (Barzi)
• Tests of strands and cables with different
  materials, 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

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Budget and Resources
FY07 resources 5 physicists 8 engineers
2 designers 9 technicians support.
staff (21 FTEs)
Budget with GA in M

• The LARP budget is almost constant (10)
• In FY08 the Core Program budget is decreasing
  because the Long Mirror is phasing down (? low
  MS, 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

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Conclusion

• 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 most 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 RD

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