stave 130 geometry

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Stave 130 Geometry Peter Sutcliffe ATLAS Strips WP4 Meeting 26 th March 14 Liverpool

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Stave 130 Geometry. Peter Sutcliffe ATLAS Strips WP4 Meeting 26 th March 14 Liverpool. Stave Dimensions – Top view. Critical Dimensions: Overall Length 1277 Width 115 – Taking into Consideration the Bus Tape Width SMC area 100 x 50 EOS at Z=0 to Silicon Edge 0.1mm - PowerPoint PPT Presentation

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Page 1: Stave 130 Geometry

Stave 130 Geometry

Peter SutcliffeATLAS Strips WP4 Meeting

26th March 14Liverpool

Page 2: Stave 130 Geometry

2

Stave Dimensions – Top view

Critical Dimensions:• Overall Length 1277• Width 115 – Taking into Consideration the Bus Tape Width• SMC area 100 x 50• EOS at Z=0 to Silicon Edge 0.1mm• Start of Silicon from Z=1277.1 = 3.36• Module to Module Gap 0.46mm• Pitch of Modules 98mm

Page 3: Stave 130 Geometry

3

Stave Dimensions – Stereo Side

Critical Dimensions:• EOS at Z=0 to Silicon Edge 0.1mm• Start of Silicon corner from Z=1277.1 = 1.45• Module to Module Gap 0.38mm• Pitch of Modules 98mm• Stereo Angle 40mrad

Stave length is determined by this corner of the last stereo module

Page 4: Stave 130 Geometry

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Stave thicknesses

• Inner Skin to Inner skin 5.2• Kapton Bus to Kapton Bus 5.9 (co cured to carbon skin)• Wirebond to Wirebond 10.04mm• ASIC to ASIC 8.24mm

Maximum wire bond height

Page 5: Stave 130 Geometry

Z=0 End Closeout

5

Z=0 Closeout manufactured from PEEK3D Printed Model

Stave to Stave DimensionsAt Z=0

Page 6: Stave 130 Geometry

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Z=1277.1mm End Closeout

• Manufactured from PEEK• Machined or moulded• Closeout is sandwiched around the

cooling tube and the Electrical Break ‘potted in’

Page 7: Stave 130 Geometry

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‘C’ Channel Section

Page 8: Stave 130 Geometry

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2.8mm Dia Ti reducer

2.275mm Dia Ti Tube

Alumina insulator

2.275mm Dia Ti reducer

Electrical Break

2.8mm Dia Ti Tube

• Assembly vacuum brazed with silver copper eutectic• Brazing temperature around 780°C

• Several have been manufactured and look good. Alumina insulator is very strong

• Electrical break assembly is welded to the stave and inlet/exit tubes.

• E break assembly is potted into the closeout

Richard French

End CloseoutCarbon foam

Potted into end closeout

Page 9: Stave 130 Geometry

Stave positions according to the LoI(Hessey and Hayward)

Layer No of Staves

Radii to Centre of Stave

0 28 405

1 36 519

2 44 631

3 56 762

4 (Stub)-not shown

64 862

5 72 1000

Page 10: Stave 130 Geometry

Potential Clashes

Worst CaseInner layer with 10° stave angle and 7mm hign DCDC

• Opto side –I think this will sort itself out i.e. slimmer opto packages or both opto packages on outer stave.

• Clash with DCDC to Locking point– Possible solutions:

Place power tracks on the opposite side of tape Make DCDC a planar coil with thickness less than 4mm Reduce size of the cylinder mounted locking point Something else…..……

Page 11: Stave 130 Geometry

Details of DCDC InterferenceWith 10°Stave angle (Layer 0)

If 7mm DCDC box is used, the clash with the locking bracket is 1.58mmTo obtain a clearance of say 2mm, the DCDC box would need to be 3.42mm

Page 12: Stave 130 Geometry

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DCDC Continued…Possible solutions for DCDC converter clash.1. Reduce the height to 5mm from 7mm

• This would still only give 2mm clearance to the locking point. Is this enough for installation tolerances?

2. Rotate the stereo modules 180°• This would mean having the power on the stereo tape on the opposite side of the stave i.e. locking

bracket side. 3. Shrinking the PCB board?

• Not sure as it may clash with the wire bonds…potential disaster.

Power side

Page 13: Stave 130 Geometry

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Item Number Drawing Number Title Material Quantity/Stave

1 NP49-01-100 S-LHC STAVE ASSEMBLY - ABCN130 MODULE SEE PARTS 1

2 NP49-01-104 SILICON MODULE ASSEMBLY BACK TO BACK- ABCN130 SEE PARTS 26

3 END SUPPORT Z=0 LCPE 1

4 LOCKING BRACKET Z=0 LCPE 1

5 LOCKING MECHANISM ASSEMBLY LCPE 5

6 NP49-01-101 ABCD130 SIDE MOUNTED SMC BARE STAVE SEE PARTS 1

7 NP49-01-106 END CLOSEOUT SMC - LH CARBON FIBRE PEEK TEKAPEEK CF30 OR SIMILAR 1

8 NP49-01-130 END CLOSEOUT SMC - RH CARBON FIBRE PEEK TEKAPEEK CF30 OR SIMILAR 1

9 NP49-01-108 ALLCOMP COOLING STRIP ALLCOMP K9 FOAM - SN43 OR SN56 16

10 NP49-01-109 EDGE CHANNEL - LONG CFRP 1

11 NP49-01-110 EDGE CHANNEL SHORT CFRP - - 1

12 NP49-01-111 END CLOSEOUT Z=0 CARBON FIBRE/PEEK TECAPEEK CF30 OR SIMILAR 1

13 NP49-01-112 STAVE TOP SKIN CFRP -K13D2U/RS3 1

14 NP49-01-113 STAVE BOTTOM SKIN CFRP - K13D2U/RS3 1

15 NP49-01-114 STAVE HONEYCOMB CORE - EDGE CFRP HONEYCOMB UCF-126-3/8-2.0 ULTRACORE 2

16 NP49-01-115 STAVE HONEYCOMB CORE - CENTRE CFRP HONEYCOMB UCF-126-3/8-2.0 ULTRACORE 1

18 NP49-01-116 STAVE HONEYCOMB CORE - SMC CFRP HONEYCOMB UCF-126-3/8-2.0 ULTRACORE 1

19 NP49-01-117 EDGE CHANNEL - SMC LONG CFRP - 1

20 NP49-01-118 EDGE CHANNEL - SMC SHORT CFRP - 1

21 NP49-01-120 POWER TAPE - TOP Cu/KAPTON 1

22 NP49-01-121 POWER TAPE - BOTTOM Cu/KAPTON 1

23 NP49-01-125 ALLCOMP COOLING STRIP - Z=0 ALLCOMP K9 FOAM SN43 OR SN56 2

24 NP49-01-129 130nm STAVE COOLING TUBE ASSEMBLY TITANIUM/ALUMINA 1

25 NP49-01-123 1.3m STAVE COOLING TUBE- DIA 2.275mm TITANIUM - CP2 1

26 NP49-01-131 INLET/OUTLET TUBE - 2.8 OD X 0.15 WALL TITANIUM - CP2 2

27 NP49-01-126 ELECTRICAL BREAK ASSY TITANIUM/ALUMINA 2

28 NP49-01-128 ALUMINA INSERT ALUMINA 229 NP49-01-127 NIPPLE- 2.275 DIA TUBE TITANIUM 2

30 NP49-01-131 NIPPLE- 2.8 DIA TUBE TITANIUM 2

Stave Parts List