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HL-LHC IR Corrector Magnets Conceptual Design & Construction Activity

HL-LHC IR Corrector Magnets Conceptual Design & Construction Activity. Giovanni Volpini on behalf of the LASA team CERN, 1 July 2014. linguine ( supplier D, #7) . bucatini ( supplier B, #9) . s paghetti ( supplier D, #12) . s paghettoni ( supplier D, #412) . maccheroncini

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HL-LHC IR Corrector Magnets Conceptual Design & Construction Activity

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  1. HL-LHCIR Corrector MagnetsConceptual Design & ConstructionActivity Giovanni Volpini on behalf of the LASA team CERN, 1 July 2014

  2. linguine (supplier D, #7) bucatini (supplier B, #9) spaghetti (supplier D, #12) spaghettoni (supplier D, #412) maccheroncini alla chitarra (supplier D, #13) do not call them just spaghetti… Giovanni Volpini CERN, 15 May 2014

  3. Corrector Magnet Summary Table I Giovanni Volpini CERN, 1 July 2014

  4. Corrector Magnet Summary Table II Giovanni Volpini CERN, 1 July 2014

  5. DifferentialInductance, a6 «zero-current» inductance, from linear-iron case, L = 149 mH Ld(I) = 1/I dU/dI = ns2 / AtdU/d At Inductance [H] Operating point Ld = 52 mH 263/III Giovanni Volpini CERN, 1 July 2014 Ampere·turns [At]

  6. Corrector Magnet Summary Table III Giovanni Volpini CERN, 1 July 2014

  7. Corrector Magnet Summary Table IV Total for series + spares: 45 + 51 kg procured for prototypes: 38 kg Giovanni Volpini CERN, 1 July 2014

  8. LHC vs. HL-LHC corrector magnet comparison chart 187/II Giovanni Volpini CERN, 1 July 2014

  9. Quadrupole 891 460 yoke coil bore Giovanni Volpini, CERN 19 June 2014

  10. Iron yoke total length 800 mm HX hole D60 @ r = 185 mm round bore flux return plate Symmetric flux return plate

  11. Design Sextupole preliminary design 320 Yokelaminationsmachined by laser cut followed by EDM (finalaccuracy 1/100 mm) on the relevantsurfaces: poles, coil slots, alignmentslots. 5.8 mm thickironlaminations 123 Giovanni Volpini, CERN 19 June 2014

  12. winding and insulation Winding machine: -Commercial winding machine -Home-developed braking system, controlling the wire tensioning between 1 and 20 kg ; Insulation scheme: -wire w/ S2 glass 0.14 mm thick (on dia) -ground insulation applied after removing the coil from the winding tool w/ two crossed, 50% overlapped, 0.13 mm thick S-2 glass tape (total 0.52 mm) Giovanni Volpini CERN, 1 July 2014

  13. Impregnation mould Giovanni Volpini CERN, 1 July 2014

  14. Oven & impregnation Temperature monitored with a PT100 on the mould, in agreementwithin +/- 1°C wrt the set temperature (in stationaryconditions) • CTD-101K resin Giovanni Volpini CERN, 1 July 2014

  15. «Coil 0» cross section outer side inner side Far from perfect, butthiswas a first test for the wholesystem! Giovanni Volpini CERN, 1 July 2014

  16. «Coil 1» under the opticalmeasuring machine Giovanni Volpini CERN, 1 July 2014

  17. Coil assessment • Test protocol • - Coil resistance @ RT • Ground insulation test @ 5 kV (different techniques) > 8 Gohm • Dimensional measurements; • w/ gauge, w/ optical measuring apparatus • -> mould parts misaligned, tolerances of +/- hundredths seem feasible • Thermal shock @ LN on coil and on resin sample -> some crack in the coil, near bubbles, but not only. No crack in resin sample • Repeat resistance & ground insulation test -> OK • TBD • Inductance measurement • Cut & cross sections Giovanni Volpini CERN, 1 July 2014

  18. Next steps Design magnetic length cross-talk between magnets July 2014 fringe field (“harmonics” at the magnet ends) forces between magnets (March 2014) July 2014 Residual magnetization at I=0 and impact on the harmonics Cross check COMSOL results w/ Roxie (March 2014) Mechanical design (May 2014) September 2014 (new) conceptual design of all the magnets Construction & test Wind & impregnate a dummy coil (June 2014) Design the test cryostat (new) test coil w/ SC wire (July 2014) (new) next mould manufactured (Oct 2014) Giovanni Volpini, CERN 14 January 2014

  19. INFN-CERN Agreement approved by INFN board of directorsin June ‘14, to be signed by INFN President

  20. thankyou for yourattention Hint of the day: festina lente!

  21. Storedenergy vs. At a6

  22. Quadrupole 891 460 yoke coil bore Giovanni Volpini, CERN 19 June 2014

  23. Iron yoke total length 800 mm HX hole D60 @ r = 185 mm round bore flux return plate Symmetric flux return plate

  24. Design Sextupole preliminary design 320 Yokelaminationsmachined by laser cut followed by EDM (finalaccuracy 1/100 mm) on the relevantsurfaces: poles, coil slots, alignmentslots. 5.8 mm thickironlaminations 123 Giovanni Volpini, CERN 19 June 2014

  25. 2700 ID 510 Giovanni Volpini, CERN 19 June 2014

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