Status Report on the Design and Fabrication of 29 quads for ATF2

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Status Report on the Design and Fabrication of 29
quads for ATF2

• By Cherrill Spencer, SLAC, for ILC-BDS weekly
  meeting on 22nd November 2005

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ATF2 quadrupoles QEA-D32T180 Activity from
June September 2005

• Are 8 quadrupoles in the extension of the ATF
  extraction line
• Are 6 quads in matching section of ATF2 beamline
• Are 14 quads in final focus section of ATF2 (
  aside from QF1QD0)
• Decided back in June these 3 sets could all be
  made from same design.
• Decided an existing KEK quad called the TOKIN
  3390 (QB4 style) would be basis of the design
  for the 28 ATF2 quads listed above.
• Contract signed in early July with the Magnet
  Shop of the Institute of High Energy Physics
  (IHEP) in Beijing, China to make new drawings and
  fabricate 29 quads (1 spare) by March 31st 2006.
• In July Spencer wrote very detailed
  specifications for this quad, new name
  QEA-D32T180. Defined precisely the type of
  materials to be used, the fabrication processes
  to be followed and the tolerances to be met. Used
  USA and Japanese standards. Sent some top
  assembly drawings of TOKIN 3390 to IHEP.
• August-September IHEP drew new drawings for all
  parts and assemblies. IHEP and Spencer negotiated
  substitute Chinese materials to be used where
  Spencer could qualify them to her satisfaction.

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ATF2 quadrupoles QEA-D32T180 Activity from
September- December 2005

• Late September new drawing package released by
  IHEP for review. Formal review held by marathon
  video-conference on 29/ 30th Sept.
• See examples of new drawings (not yet final) on
  next slides.
• October-November Spencer continues negotiating
  changes in fabrication processes and materials to
  accommodate capabilities of IHEP magnet shop and
  availability of materials, so tight schedule can
  be met.
• Mid-Late October IHEP designing and fabricating
  coil winding forms
• October-Late November IHEP machining first
  magnets 4 steel core pieces
• Late November hollow copper conductor due to
  arrive from Finland
• Early December Wind and pot first 4 coils
• Early Dec. finish machining 1st magnets
  poletips with Electric Discharge Machine
• December 8th 14th Spencer will visit Magnet
  Shops at IHEP to observe coil winding, potting,
  core assembly and first magnets full assembly.
  Core will be measured with CMM and other QC tools
  to check tight tolerances are met. Coils will be
  tested.
• December onwards if 1st magnet passes all tests
  Spencer will allow rest of magnets to be
  fabricated. Magnetic measurements will start in
  mid-January.

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3. Coil manufacturing
NOT FINAL COIL DRAWING DO NOT USE

• 3 ). Detail of coil

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4. General Assembly

• 1). Overview of general assembly QEA-D32T180.

NOT FINAL DRAWING. DO NOT USE
32mm bore 180mm core length 47 turns per water
cooled coil Max gradient 55 T/m
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5. Flow Chart for Manufacture