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QXF cable insulation at CERN

QXF cable insulation at CERN. Paolo Ferracin, Jorge Munoz Garcia , Laura Garcia Fajardo, Jacky Mazet. Joint LARP/CM20 HiLumi meeting Napa Valley, CA, USA 8-10 April, 2013. By J. Munoz Garcia. Strand : a compact bundle of filaments (≈Ø10µm) , usually twisted together to give yarns

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QXF cable insulation at CERN

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  1. QXF cable insulation at CERN Paolo Ferracin, Jorge Munoz Garcia, Laura Garcia Fajardo, Jacky Mazet Joint LARP/CM20 HiLumi meeting Napa Valley, CA, USA 8-10 April, 2013

  2. By J. Munoz Garcia Strand: a compact bundle of filaments (≈Ø10µm), usually twisted together to give yarns (the twist is just added to add strand integrity and could be ‘Z’ or ‘S’) braided insulation Tex: unit of linear density = mass in grams of 1000m of yarn: yarns Example of tex measure: 20tex x 3(3 bundles of 20g/1000m each) in 2 ‘Z’ strands, into a ‘S’ yarn 636 or 933 RMC/FRESCA Cu cable and insulation S-Grade glass fibre sleeving (66tex) braided around Cu cable 20.9x1.86mm (without keystone) yarns TE-MSC-MDT 2 | 2013 Jorge Enrique MUÑOZ GARCIA

  3. Braiding technique at CGP Paolo Ferracin • 32 bobbins • 4 yarns (ply?) per bobbin • Speed (angle) set to guarantee full coverage

  4. By J. Munoz Garcia The cables are superimposed alternatively to compensate the cable keystone (if any), thus forming rectangular 10-units stacks: 10-stack specimen 10 units 10 units polyimide (kapton) insulated 10-stack specimen braided (fiber-glass) insulated 10-stack specimen bare cable 10-stack specimen MQXC cable 11T 33tex RMC/FRESCA Cu TE-MSC-MDT 4 | 2013 Jorge Enrique MUÑOZ GARCIA

  5. By J. Munoz Garcia block position 10-stack press block 10stack press pressure ↑ 10 stack specimen detail block and specimen std block FRESCA block TE-MSC-MDT 5 | 2013 Jorge Enrique MUÑOZ GARCIA

  6. By J. Munoz Garcia insulation thickness bare cable insulated cable 10-stack measurements how measurements are done: 5 cycles @ 10MPa 5MPa 5 cycles @ 5MPa TE-MSC-MDT 6 | 2013 Jorge Enrique MUÑOZ GARCIA

  7. By J. Munoz Garcia h Layer ofS-2 Fiber-Glass braided yarn Ø≈192µm RMC/FRESCA Cu cable and insulation S-Grade glass fibre sleeving (66tex) braided around Cu cable 20.9x1.86mm (without keystone) h insulation thickness: S2 fiber-glass 66tex next 10stack measurements: • reacted • potted TE-MSC-MDT 7 | 2013 Jorge Enrique MUÑOZ GARCIA

  8. By J. Munoz Garcia h Layer ofS-2 Fiber-Glass braided yarn Ø≈192µm RMC/FRESCA Cu cable and insulation S-Grade glass fibre sleeving (66tex) braided around Cu cable 20.9x1.86mm (without keystone) h ~ 243µm insulation thickness: S2 fiber-glass 66tex ~ 228µm next 10stack measurements: • reacted • potted TE-MSC-MDT 8 | 2013 Jorge Enrique MUÑOZ GARCIA

  9. h 11T Cu cable and insulation S-Grade glass fibre sleeving (33tex) braided around Cu cable (with keystone) h insulation thickness: S2 fiber-glass 33tex ~ 131µm ~ 126µm next 10stack measurements: • reacted • potted TE-MSC-MDT 9 | 2013 Jorge Enrique MUÑOZ GARCIA

  10. Next steps Paolo Ferracin • QXF Cu cable has been insulated in different braiding configurations • 2 and 3 yarns per bobbin • Different speed (angles) • Preliminary results (calliper measurements) • ~150 micron with 70-90% coverage • QXF Cu cable ten-stack fabrication and measurements on-going • In parallel, FRESCA2 reacted cable ten-stack measurements • Good evaluation of effect of heat treatment • Second iteration on QXF Cu cable • Second week of May • To be discussed: what about 33TEX with 636 sizing?

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