NED Midterm Review

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NED Midterm Review
Arnaud Devred CEA/DSM/DAPNIA/SACM
CERN/AT/MAS Bruxelles 13 April 2007
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CARE/NED JRA

• The NED JRA has been articulated around four
  Work Packages
• 1 Management Communication (MC),
• 2 Thermal Studies and Quench Protection
  (TSQP),
• 3 Conductor Development (CD),
• 4 Insulation Development and Implementation
  (IDI),
• It involves 7 institutes (8 laboratories)
• The core of the Activity is the Conductor
  Development Work Package, which absorbs 70 of
  the EU funding, and which is carried out through
  two industrial subcontracts (Alstom/MSA in France
  and SMI in the Netherlands) under CERN
  supervision.

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TSQP Work Package (1/2)

• The TSQP Work Package includes the design and
  manufacturing of an He-II, double-bath cryostat.
• The cryostat was built by Kriosystem in Poland
  under the supervision of Wroclaw University
  according to specifications written by CEA.
• It was commissioned at CEA in September 2006 (EU
  delivrable), and is now used for various types of
  heat transfer measurements
• A final report (EU delivrable) will be issued on
  30 September 2007.

Miscellaneous views of NED cryostat (Courtesy M.
Chorowski, WUT)
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TSQP Work Package (2/2)

• The TSQ work package also included a quench
  computation task carried out by INFN-Milan and
  completed by a final report issued in early 2006
  (EU delivrable).
• Thorough computations have been carried out for
  two types of NED magnet configurations (cos?,
  layer design and cos?, slot design).
• Both configurations can be protected, using
  active protection heaters.

Simulation results for 10-m-long model (Courtesy
M. Sorbi, INFN-Mi)
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CD Work Package (1/2)

• Both manufacturers have achieved great progress.
• Wire samples have undergone thorough
  characterizations and cross-checks at CEA, CERN,
  INFN-Genva, INFN-Milan, and Twente University.

Alstom/NED (workability studies) 1.25 mm 78 x
85 ?m sub-element 740 A (1500 A/mm2) _at_4.2 K
12T
SMI/NED (near final design) 1.26 mm 288 x 50 ?m
tube 1400 A (2500 A/mm2) _at_4.2 K 12T World
Record!
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CD Work Package (2/2)

• Alstom/MSA is expected to complete its
  feasibility study next June and to have a final
  design ready for production by next October.
• SMI is expected to carry out cabling tests in
  May if these tests are successful, it will be
  given the go-ahead for final production.
• Both manufacturers are expected to complete
  their production
• (4 Alstom/MSA and 2 SMI cable unit lengths EU
  delivrables) by the end of the year.
• Final reports (EU delivrables) on the
  performance of the wires and cables will be
  issued at the same time.

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IDI Work Package

• CCLRC/RAL has identified a polyimide-sized glass
  fiber tape that is able to sustain the required
  Nb3Sn heat treatment without degradation (final
  report on conventional insulation EU
  delivrable issued last month).
• CEA has pursued its development of an
  innovative, ceramic-type insulation system,
  which shows greatly enhanced thermal
  performances, but still requires more work on
  mechanical properties (final report EU
  delivrable to be issued by the end of the month).

Polyimide-sized S2 glass fiber tape (Courtesy
S. Canfer, CCLRC/RAL)
Heat-treated conductor stack with CEA innovative
insulation (Courtesy F. Rondeaux P. Fourcade,
CEA)