11 Tesla Dipole Coil End Turns with CTD-1202x

Binder

Fred NobregaOctober 3, 2013

11 T Dipole Coil End Turns w/Binder 2

11 Tesla Dipole Cable

Cable is mechanically unstable, 40 x 0.7 mm dia. strand, 14.95 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 added10/3/2013

11 T Dipole Coil End Turns w/Binder 3

11Tesla Coil Winding Parameters

2 m COILS 1 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.

10/3/2013

11 T Dipole Coil End Turns w/Binder 4

Practice Coil, PC01, L2

10/3/2013

Q:\HFM\LHCD-11T\MBH Coil & Magnet info & pictures\PC01\PC01 Photos\Winding of L2\2011-06-07-1353-32\DSC05661.JPG

11 T Dipole Coil End Turns w/Binder 5

Coil MBH01, Lead End

10/3/2013

Q:\HFM\LHCD-11T\MBH Coil & Magnet info & pictures\MBH01\Winding L1 Pictures\2011-08-23-1333-23\DSC06663.JPG

11 T Dipole Coil End Turns w/Binder 6

CTD-1202x Curing

10/3/2013

11 T Dipole Coil End Turns w/Binder 7

Cable Temp During CTD-1202x Curing

10/3/2013

0 60 120 1800

20

40

60

80

100

120f(x) = 0.516413482393187 x + 29.8045493819541R² = 0.963600416673217

Time, s

Tem

p,

C

11 T Dipole Coil End Turns w/Binder 8

Summary

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)

10/3/2013