SQXF 25 m Cable Practice Winding at LBNL

Miao Yu

Dan Cheng

10/31/2013

Practice Winding Goal

• Wind inner layer of SQXF short version coil to – Test L1 end parts designed by BEND– Experience the cable windability

• Use the HQ winding mandrel as a baseline– FNAL-supplied mandrel spacer (120 mm -> 150 mm)

eliminates need for significant tooling fabrication• Some tooling was modified or adjusted

– All the parts were epoxy printed (SLA) through rapid prototyping machine.

2

Practice Winding Model

3

Need to modify clamping rig mount positions and hole locations

FNAL supplied spacer to fill space from 120mm to 150mm dia needs modification for mounting to HQ mandrel

4

Winding setup and procedure

• Use HQ winding traveler as the guidance• 30 lbs winding tension

5

Cable

• 25 m long QXF Cable wrapped with E-glass tape, the average insulation thickness is 0.15 mm

• Winding with the tool, no popped strands

6

Layer Jump Cable

Layer jump cable exit L1 LE Pole

SQXF Design at FNAL

7

End parts fitting

8

Fluffy Coil

• Low winding tension• Short coil has bigger end effect.

Off mid-plane by 10 mm

9

L1 LE

After compression very hard on LE, we can install the saddle and all the end parts fit better.

10

4~5 mm Gap

11

12

~3 mm gap

13

L1 RE

14

15

Experience from the winding

• The insulated cable (1045Z-13) was stable• Coil is very fluffy, although it is due to low winding

tension and short coil end effect, the flexible end parts are needed.

• Some of the parameter may need to be adjusted during 2nd iteration of the end parts. We will try 4 IL parts with different angle during 1 m SQXF coil.