H. Felice - P. Ferracin – D. Cheng09/19/2013

Update on structure CAD model

2

COLLAR (I)

• IR of the collar has been fixed to 115 mm which accounts for• Nominal coil OR after impregnation is 113.376 mm (baseline)• Wide coil (18.636 mm) OR after impregnation is 113.886 mm• Trace + insulation 0.1 + 0.15 mm

• Decision on the length of the structure to 1.550 m (CAD)• Coil length (endshoe to extension): 1.51 m• + 0.02 m of coil length variability (not in CAD)• + 0.02 m of G10 pushers (0.01 per side in CAD) => included• + 0.02 m of SS pusher (0.01 m per side in CAD) => included

• will be inside structure in CAD model (no variability accounted for)• Might be flush with structure or sticking out depending on coil length

variability.• Lamination thickness: 50 mm => 31 collar laminations• Comment from Mike: structure on the long side, we might remove one

lamination

• Alignment feature at the midplane will be female on the collar side

09/19/2013

3

COLLAR (II)

• Bolting of the collar:• M6 bolts• Slotted hole will be open to avoid thin wall thickness• Decision: not a through thread: Standard thread + 10 mm longer

• Tie rod holes will be moved (same center radius, few degrees down) to ensure enough wall thickness between tie rod hole and the bolt hole (at least 3 mm)• M6 tie rods tolerance H9• 9 mm holes with bushings 1 mm wall thickness

• A profile tolerance will be given for the collars laminations (tolerance de forme) as all the surfaces are important surfaces

09/19/2013

4

Pole key

• Pole groove is 14 mm• Collar distance 15 mm

• 0.5 mm per side to include ground plane insulation and key shimming• Key nominal width is 14-2x0.625 = 12.75 mm

• Ground plane insulation should be discussed between coil WG and structure WG• Coil ground plane insulation could be simplified as long as the collar have also

Kapton wrap

09/19/2013

5

PAD and MASTERS (I)

• Pad and pad master might be merged in a unique component• Done in CERN CAD model• To be discussed

• Yoke master will remain a separate component from the yoke• Making it part of the yoke would prevent loading by quadrant and prevent

aligning coil pack to yoke during loading

• The alignment key will be a separate component• Making it part of the pad could make the assembly more difficult• the alignment key will be made wider• Will be brass

• Load keys• will be stainless steel• Slot and spacing to be defined

09/19/2013

6

PAD and MASTERS (II)

• Tie rod • M10• 15 mm holes and bushings wall thickness 2 mm

• Pad bolts• M8• Through thread

• Distance between the pads = 40 mm

09/19/2013

7

Alignment key and yoke master

• Master to master distance: 3 mm• Bladder slot: 3 mm deep => we keep it

• Dan suggested to go to 5 mm• 0.5 mm bladder thickness + 9 mm pull shim at LBNL• When collapsed => 6 mm so thinner pull shim should be used

• Fresca used 6 mm – Juan Carlos comfortable with that• Key groove depth: 5 mm per side• Load Key pad to master direction : 10 mm • Alignment key pad to master direction: 10

• Key size might be increased to 11 mm

• Yoke master thickness : 10 mm (junction block) + 2 mm (wall thickness)• Need to confirm junction block dimension

• LBNL is using 9.5 mm

• Alignment key slot• 5 mm deep on each side (yoke master and pad)• Key is 10 mm (pad to master dimension)• Width to be defined

09/19/2013

8

YOKE (I)

• Note about the laminations:• Moving outward radially in the structure, collars, pads and yoke are laminated• Longitudinally the stack of laminations should be offset-ed moving outward

from the collar to the pad:• The 1st collar and yoke lamination will be 50 mm laminations• The 1st pad lamination will be a 25 mm lamination

• Yoke keys:• a= 6 mm• b = 3 mm• Radial slot = 9.5 mm• Azimuthal slot = 12 mm

Yoke key 11 (height) by 8 mm (wide)

a

b

radial

azimuthal

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YOKE (II)

• Yoke alignment/integration features• When present, should be present in all 4 quadrants• Need only to be present in extremities laminations• In between could be plain laminations

• Geometry of the features to be discussed with Herve Prin

Þ Magnetic and mechanical impact on the design has to be checked

• Lamination assembly:• M20 tie rods and 24 mm holes with 2 mm wall thickness bushings

• Cooling hole and pipes• 1.5 mm clearance between tube and hole (radius)• 2 mm wall thickness• 77 mm diameter hole

09/19/2013

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SHELL

• Shell of SQXF is made of 2 segments

• Shell alignment/integration features• When present, should be present in all 4 quadrants• Geometry of the features to be discussed with Herve Prin

Þ Mechanical impact on the design has to be checked: 3D

09/19/2013

11

END PLATE and RODS

• Baseline plate is 75 mm thick• Scaled up from HQ (60 % more axial forces in QXF)• Aperture is 150 mm in diameter• M16 “real” bullets (spherical end) will be used instead of set screws (HQ)

• Distance between endplate and face of the yoke is set to 25 mm• 35 mm because of the pad tie rods could change if one lamination is removed

• Rods • M36 axial rods

• Spherical washer NOT interfering with cooling holes => OK• have to be elongated in present CERN CAD model to allow for spherical washer

and 2 nuts• Thread on rods will be asymmetric for lead and return ends (to allow for axial

load rig (endplate, piston…) mounting)• Axial load rig will be assembled on return end (non connection) side => Should

be added to the CAD model

09/19/2013

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Analysis to be performed/performed

• ANSYS 2D model Incorporate pad master in pad => no change in the optimization Change alignment feature between pad and collar (female)• Modify yoke master thickness to accommodate junction blocks

• Master=15 mm wide• 3 mm deep bladder slot• 12 mm bladder wall

• Accommodates 9.5 mm junction block allowing 2 mm wall thickness• Set pad to ymaster minimum distance = 3mm

• Impact of yoke features on magnetic and mechanical analysis• Opera 2D / Roxie to be defined

09/19/2013