Conceptual design of superconducting correctors for hi lumi project
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Conceptual design of superconducting correctors for Hi- Lumi Project. F. Toral - CIEMAT. CIEMAT, Jan. 28th, 2013. Conceptual design: superferric. Due to the moderate requirement on magnet strength, a superferric design is feasible. The superferric layout has three important advantages:

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Conceptual design of superconducting correctors for hi lumi project
Conceptual design of superconducting correctors for Hi-Lumi Project

F. Toral - CIEMAT

CIEMAT, Jan. 28th, 2013


Conceptual design superferric
Conceptual design: superferric

  • Due to the moderate requirement on magnet strength, a superferric design is feasible.

  • The superferric layout has three important advantages:

    1) The coils are placed beyond the aperture diameter and wires are concentrated in a slot, compared to the broad extension of a cos-theta type coil. Both features yield higher radiation resistance.

    2) The fabrication complexity and cost is lower, because coils are flat and besides the wire positioning tolerance is relaxed.

    3) It is very well suited for short magnets with broad aperture.

2


Conceptual design superferric1
Conceptual design: superferric

  • Vacuum impregnated coils

  • Laminated ARMCO iron yoke

  • Alignment by stainless steelkeys

  • Radiation resistance:

    • Polyimide insulated NbTi wire

    • CTD 422B: a blend of cyanate ester and epoxy resin

    • Stainless steel coil spacers

    • Duratron 2300 PEI connection plate and ancillary pieces

    • Insulating sleeves made of polyurethane and glass fiber




First magnetic calculations
First magnetic calculations

  • Full 3-D simulation has been performed using Roxie.

  • It is not an optimal solution, it is just a proof of principle.

  • The separation between mechanical lengths is 40 mm. Connections are made in 20 mm of longitudinal length. Overall length is 2.958 m.

  • A nonlinearity of the transfer function up to 5% is assumed as non problematic.

6


First magnetic calculations octupole
First magnetic calculations: octupole

  • The fringe field goes beyond the mechanical length of the magnet.

  • No significant cross-talk between the magnets is expected, but must be checked.

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Conclusions
Conclusions

  • A baseline design of superferric magnets complies with the specifications.

  • Some open points are still pending:

    • Cross-talk between adjacent magnets.

    • Maximum allowable non-linearity of the transfer function.

    • Nominal current (that is, available power supplies and leads).

  • The framework for this Collaboration needs to be defined.

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