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

TE-MSC-MDT 2 Jorge Enrique MUÑOZ GARCIA Example of tex measure: 20tex x 3(3 bundles of 20g/1000m each) in 2 ‘Z’ strands, into a ‘S’ yarn RMC/FRESCA Cu cable and insulation S-Grade glass fibre sleeving (66tex) braided around Cu cable 20.9x1.86mm (without keystone) braided insulation 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’) Tex: unit of linear density = mass in grams of 1000m of yarn: yarns | 2013 By J. Munoz Garcia 636 or 933

Braiding technique at CGP 32 bobbins 4 yarns (ply?) per bobbin Speed (angle) set to guarantee full coverage 09/04/2013 Paolo Ferracin3

TE-MSC-MDT 4 Jorge Enrique MUÑOZ GARCIA The cables are superimposed alternatively to compensate the cable keystone (if any), thus forming rectangular 10-units stacks: MQXC cable11T 33tex polyimide (kapton) insulated 10-stack specimen braided (fiber-glass) insulated 10-stack specimen bare cable 10-stack specimen RMC/FRESCA Cu 10 units 10-stack specimen | 2013 By J. Munoz Garcia

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

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

| 2013 TE-MSC-MDT 7 Jorge Enrique MUÑOZ GARCIA RMC/FRESCA Cu cable and insulation S-Grade glass fibre sleeving (66tex) braided around Cu cable 20.9x1.86mm (without keystone) next 10stack measurements:  reacted  potted S-grade fibre glass layer insulation thickness RMC/FRESCA Cu cable 66 tex 5MPa 10MPa insulation thickness: S2 fiber-glass 66tex Layer ofS-2 Fiber-Glass braided yarn Ø≈192µm h h By J. Munoz Garcia

TE-MSC-MDT 8 Jorge Enrique MUÑOZ GARCIA RMC/FRESCA Cu cable and insulation S-Grade glass fibre sleeving (66tex) braided around Cu cable 20.9x1.86mm (without keystone) S-grade fibre glass layer insulation thickness RMC/FRESCA Cu cable 66 tex 5MPa243 µm 10MPa228 µm next 10stack measurements:  reacted  potted ~ 243µm ~ 228µm Layer ofS-2 Fiber-Glass braided yarn Ø≈192µm | 2013 insulation thickness: S2 fiber-glass 66tex h h By J. Munoz Garcia

| 2013 TE-MSC-MDT 9 Jorge Enrique MUÑOZ GARCIA 11T Cu cable and insulation S-Grade glass fibre sleeving (33tex) braided around Cu cable (with keystone) insulation thickness: S2 fiber-glass 33tex next 10stack measurements:  reacted  potted S-grade fibre glass layer insulation thickness 11T Cu cable 33 tex 5MPa131 µm 10MPa126 µm ~ 131µm ~ 126µm h h

Next steps 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? 09/04/2013 Paolo Ferracin10