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BNL - FNAL - LBNL - SLAC
Model Magnet RD (WBS 2.2) LARP Collaboration
Meeting October 5-6, 2005 Gian Luca Sabbi
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LARP Magnet Program Goals
FY09 Milestone Demonstrate viability of
Nb3Sn technology for Quad-first option
1. Capability to deliver predictable,
reproducible performance TQ (Technology Quads,
2005-07) D 90 mm, L 1 m, Gnom gt 200
T/m 2. Capability to scale-up the magnet
length LQ (Long Quadrupoles, 2008-09) D
90 mm, L 4 m, Gnom gt 200 T/m 3. Capability to
reach high gradient (pole tip field) in large
aperture HQ (High Gradient Quads, 2008-09) D
90 mm, L 1 m, Gnom gt 250 T/m

• Fabrication of the first two TQ quads (TQS01 and
  TQC01) has started
• TQS01 test in February/March 2006 TQC01 test in
  April/May 2006

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Technology Quads (TQ)

• Objective contribute to developing the
  technology base for LQ HQ
• evaluate conductor and cable performance
  stability, stress limits
• develop and select coil fabrication procedures
• select the mechanical design concept and support
  structure
• demonstrate predictable and reproducible
  performance
• Implementation two series, same coil design,
  different structures
• TQS models shell-based structure
• TQC models collar-based structure
• Magnet parameters
• 1 m length, 90 mm aperture, 11-13 T coil peak
  field
• Nominal gradient 200 T/m maximum gradient
  215-265 T/m

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TQS01 Shell-based Structure

• Concept
• Aluminum shell over yoke and pads
• Assembly based on bladders and keys
• Advantages
• Can deliver very high pre-stress
• Large pre-stress increase at cool-down
• Easy assembly/disassembly/reassembly
• RD issues
• Coil alignment, field quality
• Long vs. segmented shells

TQS01 task leader S. Caspi - Test planned for
February/March 2006
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TQC01 Collar-based Structure

• Concept
• Support by thick SS collars
• Assembly w/external press
• Advantages
• Proven coil positioning
• Proven length scale-up
• RD issues
• Deliver required pre-stress
• Pre-stress overshoot
• Flexibility for RD

TQC01 task leader R. Bossert - Test planned for
April/May 2006
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TQ Coil Winding Status

• 6 unit lengths of practice cable and 10 UL of
  cable fabricated at LBNL
• 8 insulated UL available for production coils, 2
  additional UL to follow
• 4 practice coils wound and cured at FNAL
• Various improvement were included based on
  practice winding/curing
• 2 production coils for TQS01 were fabricated at
  FNAL

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TQ Coil Reaction and Impregnation

• The first set of practice coils were reacted and
  impregnated at FNAL
• Good results on the first set of impregnated
  coils
• The second pair of practice coils is being
  reacted at LBNL
• Strand cable samples are being reacted with
  the practice coils
• Reaction of first pair of production coils
  starts in 3 weeks

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TQ mechanical models

• Mechanical models using dummy coils
• TQS01 (2004) TQC01 (underway)

• Mechanical models using the practice coils will
  be performed in the next 3 months in preparation
  for magnet assembly

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TQ Schedule (Rev. 10/5/2005)
Q3-05 Q4 2005 Q1 2006 Q2 2006
Q3 2006
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TQ Program following TQS01-TQC01

• 1. Additional tests using the same coil design
• TQS02 reconfigure/optimize based on TQS01
  results
• Increase preload? (e.g. 4.2 K to 1.9 K) Modify
  structure? (as for HD1)
• Replace quadrant with spare? (if localized
  quenches observed)
• TQC02 new coils (w/RRP conductor) in
  collar-based structure
• Feedback from TQC01 can be incorporated at
  assembly
• Coils might be redirected to TQS depending on
  test results
• TQE01 coil-structure exchange
• Disassemble TQC01 coil and test in TQS01
  structure
• Some technical issues to be addressed decision
  after TQS01/TQC01 tests
• 2. Coil iteration and fabrication of TQS03
  TQC03 coils

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TQ plan after S01-C01 (Rev. 10/5/05)
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Model Magnet Tasks Budget Summary