Attendees: Helene Felice, Ariel Haziot, Glyn Kirby, Davide Tomasini

Presentation draft plan by AH

• Mains technological choices to make before D1.
• Requirements for these choices.
  • DT notices that "no cracks" is not appropriate for wax. HF proposes "Minimize energy realease during cool down"
  • Discussion on a different strategy for magnet design: something that remains all the the time under compression, releasing stress on the former. The former is supported by the outer rim. For example a liquid that expends when cooled down
  • Necessity of a 2D model and FEA
• Description of the winding test
  • Cabling machine used for Hi-lumni CCT is weak according to FOP, opportunity to improve it.Desc
• Description of the impregnation test
  • A small coil test is still important. The box test is not so representative. Small amount of cable 1km instead of 9 for D1.
• Description of the cheap field laboratory
  • The small CCT idea gets some good feedback as it can start almost now.
  • This program is important and should be ran in parralale to the small tests for D1

Presentation design ideas by GK

• Design of combined function with only few turns.
  • 2 layers, 8 turns, 200 mm aperture, still almost 4T peak field
  • 2 layers, 4 turns, 200 mm aperture, around 2T peak field
  • what about 2 turns ?
  • what about 2 turns and 50 mm aperture ?
  • ...

Other discussion

The GRP former, what  should we do with it? It is proposed to use it to do small coil test on GRP formers. Maybe design a step file with the path for 2 coils with 2 layer on the full length. We will slice it afterwards.

Conclusion

• AH makes a timeline with list of tests/formers/design
  • GK: winding test > impregnation > short sample
• AH calculates the approximated current in the small CCT and prepare a comparative table with 3 options.
  • 56 mm
  • 100 mm
  • 200 mm (20 mH)
• GK will prepare some more designs, specially for the small CCTs