Fred Nobrega October 3, 2013

 Cable is mechanically unstable, 40 x 0.7 mm dia. strand, mm wide.  PC01 had >5 popped strands on each layer, roped twice.  MBH01 had 7 inner & 5 outer popped strands, roped 4 times  Binder was used to repair each popped strand.  MBH02 had 3 documented popped strands (DR)  Implemented new procedure to use binder on each end turn during MBH02 and all subsequent coils.  MBH03 had no popped strands.  MBH04 had 1 popped strand due to process mistake; binder was not fully cured. Cable manufactured at CERN.  All subsequent coils (MBH05-11) had no popped strands.  Cable mid-thickness reduced  packing factor increased  Stainless steel core added 10/3/ T Dipole Coil End Turns w/Binder2

2 m COILS1 m COILS  PC01, MBH01, MBH02, MBH03, MBH04  Used 180 degree cable twist between spool and coil  Distance between spool and center of table rotation is the same as used for the LHQ 3.8 m.  Cable tension ~130 N.  MHH 05 and subsequent coils  No cable twist used between spool and coil  Distance between spool and center of table is 2.67 m  Cable tension ~130 N. 10/3/ T Dipole Coil End Turns w/Binder3

10/3/2013 Q:\HFM\LHCD-11T\MBH Coil & Magnet info & pictures\PC01\PC01 Photos\Winding of L2\ \DSC05661.JPG 11 T Dipole Coil End Turns w/Binder4

10/3/2013 Q:\HFM\LHCD-11T\MBH Coil & Magnet info & pictures\MBH01\Winding L1 Pictures\ \DSC06663.JPG 11 T Dipole Coil End Turns w/Binder5

10/3/ T Dipole Coil End Turns w/Binder6

10/3/ T Dipole Coil End Turns w/Binder7

 11 Tesla Dipole cable is difficult to wind over the ends.  CTD-1202x binder provided mechanical support to the cable during winding of the ends providing a dramatic reduction of popped strands.  Negligible size increase due to binder.  CERN’s 11 T coils using CTD-1202x binder on every turn have had no popped strands. (Coils MBH105, 106, 107) 10/3/ T Dipole Coil End Turns w/Binder8