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Conceptual design of superconducting correctors for Hi- Lumi Project (v2)

Conceptual design of superconducting correctors for Hi- Lumi Project (v2). F. Toral - CIEMAT. CIEMAT, March 7th, 2013. Outline. Last magnetic calculations Cross section of the magnets Superferric dipole design Conclusions. 2. Last magnetic calculations.

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Conceptual design of superconducting correctors for Hi- Lumi Project (v2)

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  1. Conceptual design of superconducting correctors for Hi-Lumi Project (v2) F. Toral - CIEMAT CIEMAT, March 7th, 2013

  2. Outline • Last magnetic calculations • Cross section of the magnets • Superferric dipole design • Conclusions 2

  3. Last magnetic calculations • New calculations have been done assuming a higher nonlinearity of the transfer function: 20% of saturation at nominal current. That is, the actual field at nominal current is 80% of the computed value by extrapolation of the transfer function at low currents. • The requirement on integrated strength of the decapole and dodecapole, normal and skew in both cases, has been reduced by 25%. • The cross talk between two identical consecutive magnets is negligible. Next model will include different magnets, to define the minimum distance between them. 3

  4. Last magnetic calculations 4

  5. Outline • Last magnetic calculations • Cross section of the magnets • Superferric dipole design • Conclusions 5

  6. Cross section: quadrupole 6

  7. Transfer function: quadrupole Units (1E-4) Gradient T/m Normalized current Normalized current 7

  8. Cross section: sextupole 8

  9. Cross section: octupole 9

  10. Cross section: decapole 10

  11. Cross section: dodecapole 11

  12. Cross section: dodecapole 12

  13. Outline • Last magnetic calculations • Cross section of the magnets • Superferric dipole design • Conclusions 13

  14. Superferric dipole design (I) 14

  15. Superferric dipole design (II) • The maximum allowed outer diameter is 620 mm. • The present design has not included iron holes: there are holes for the cryogenic lines, but others can be used for the field shaping due to the iron saturation. • The present optimization has been done only by iron pole morphing. The main field is about 1.5 T, which is too low to be competitive with a cos-theta design. • What is the request for the field quality? 10 units (1E-3) is good enough? • Optimization is still ongoing. 15

  16. Conclusions • A new design with higher saturation has been performed (20% of non-linearity of the transfer function). • The cross talk between consecutive magnets is being computed. • The cross section of the different magnets have been shown. • A superferric dipole design is being analysed to provide 2.5 or 4 Tm. The optimization is still ongoing. • The framework for this Collaboration needs to be defined. 16

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