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SQXF CERN Update

E. Cavanna , N. Bourcey, P. Ferracin, S. Izquierdo Bermudez, J. Mazet, J. C. Perez , Francois-Olivier Pincot, X. Sarasola 23-09-2014. SQXF CERN Update. Outline. Status Ceramic binder to improve cable mechanical stability during winding? Pole gaps Coil parts Trace QA. Coil 000.

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SQXF CERN Update

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  1. E. Cavanna, N. Bourcey, P. Ferracin, S. Izquierdo Bermudez, J. Mazet, J. C. Perez, Francois-Olivier Pincot, X. Sarasola 23-09-2014 SQXF CERN Update

  2. Outline Status Ceramic binder to improve cable mechanical stability during winding? Pole gaps Coil parts Trace QA

  3. Coil 000 • Nb3Sn – NbTi splice done • Solder: Sn96Ag4 • Flux: MOB39 • Copper stabilizer (Instead of an additional NbTi lead)

  4. Coil 101 • Reaction We are using this coil to optimize the temperature cycle in the oven. • Heat treatment completed • 2nd heat treatment done with short plateaus • 3rd heat treatment to be done only with first plateau

  5. Coil 102 • IL wound using the tool, but without applying ceramic binder at the ends (winding in the favourable direction, no problems of mechanical instability)

  6. Coil 102 • IL cured

  7. Ceramic binder during winding CTD-1202X • From the technical specification: Curing 1 hour at 80°C + two hours at 150°C • We notice that if we cure at T < 150°C, after 10 minutes the cable is still wet and the insulation is not rigid.

  8. Ceramic binder during winding PROCEDURE • Paint binder on the cable • Heat the cable on one side, and time 3 mins (after 3 mins, the cable temperature is ~150°C) • Heat the other side 3 mins.   The cable is still wet and the insulation is not rigid. We cut the insulation and the fibres are not glued (very similar behaviour in the region with and without).

  9. Ceramic binder during winding We repeated the process, heating up to 250°C, but the cable is still wet and the insulation is not rigid.

  10. Pole gaps • Initial pole gap set for each coil • Coil 000 Cu: 3 mm • Coil 101 Nb3Sn lowgrade: 7.5 mm • Coil 102 Nb3Sn: 5 mm

  11. Pole gaps Check of pole gap during fabrication * gap after heat treatment evaluated by sight (no possibility to measure it): however the gap is almost closed.

  12. Pole gaps Pole gap on Coil 000 (Cu) after heat treatment

  13. Coil Parts • CERN • Pole and end-shoe extension for coils 103-104 missing, Miao, when do you thing you will be able to ship them? • End parts • Coil 3: Expected delivery calendar week • Coil 4: Expected delivery calendar week 41 • LARP • End parts • Coil 5: End parts shipped CERNFNAL 21/09/2014 • Coil 6: Company  CERN, Calendar week 40 • Coil 7&8: Company  CERN Calendar week 42/43

  14. Coil Parts • Company confirms that they use oil only for the machining of the treaded holes. • They do not have the means to do ultrasonic cleaning by themselves. • We will clean the parts at CERN using a standard procedure developed at CERN for cleaning Tungsten (porous material) LHC-VN-FP-0001 EDMS 1210659 • Degreasing by immersion in Topklean MC 20A with ultrasonic agitation at 40 °C; • Degreasing by immersion in Promosolv 71IPA with ultrasonic agitation at 59 +/- 4°C; • Degreasing in vapour phase in Promosolv 71IPA; • Vacuum firing. Oil trapped inside the parts (coming from the wire EDM and machining operations after the SLS)

  15. Trace QA • Test set up

  16. Trace QA • Test results

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