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

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 2

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

4. 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 4 Maximum wire bond height

5. Z=0 End Closeout 5 Z=0 Closeout manufactured from PEEK 3D Printed Model Stave to Stave Dimensions At Z=0

6. Z=1277.1mm End Closeout 6 Manufactured from PEEK Machined or moulded Closeout is sandwiched around the cooling tube and the Electrical Break ‘potted in’

7. ‘C’ Channel Section 7

8. 2.8mm Dia Ti reducer 2.275mm Dia Ti Tube Alumina insulator 2.275mm Dia Ti reducer Electrical Break 8 2.8mm Dia Ti Tube A ssembly 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 Closeout Carbon foam Potted into end closeout

9. Stave positions according to the LoI (Hessey and Hayward) LayerNo of Staves Radii to Centre of Stave 028405 136519 244631 356762 4 (Stub)- not shown 64862 5721000

10. Potential Clashes Worst Case Inner 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…..……

11. Details of DCDC Interference With 10°Stave angle (Layer 0) If 7mm DCDC box is used, the clash with the locking bracket is 1.58mm To obtain a clearance of say 2mm, the DCDC box would need to be 3.42mm

12. DCDC Continued… 12 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

13. Item NumberDrawing NumberTitleMaterial Quantity /Stave 1NP49-01-100S-LHC STAVE ASSEMBLY - ABCN130 MODULESEE PARTS1 2NP49-01-104SILICON MODULE ASSEMBLY BACK TO BACK- ABCN130SEE PARTS26 3END SUPPORT Z=0LCPE1 4LOCKING BRACKET Z=0LCPE1 5LOCKING MECHANISM ASSEMBLYLCPE5 6NP49-01-101ABCD130 SIDE MOUNTED SMC BARE STAVESEE PARTS1 7NP49-01-106END CLOSEOUT SMC - LHCARBON FIBRE PEEK TEKAPEEK CF30 OR SIMILAR1 8NP49-01-130 END CLOSEOUT SMC - RHCARBON FIBRE PEEK TEKAPEEK CF30 OR SIMILAR1 9NP49-01-108ALLCOMP COOLING STRIPALLCOMP K9 FOAM - SN43 OR SN5616 10NP49-01-109EDGE CHANNEL - LONGCFRP1 11NP49-01-110EDGE CHANNEL SHORTCFRP - -1 12 NP49-01-111 END CLOSEOUT Z=0CARBON FIBRE/PEEK TECAPEEK CF30 OR SIMILAR1 13NP49-01-112STAVE TOP SKINCFRP -K13D2U/RS31 14NP49-01-113 STAVE BOTTOM SKINCFRP - K13D2U/RS31 15NP49-01-114STAVE HONEYCOMB CORE - EDGECFRP HONEYCOMB UCF-126-3/8-2.0 ULTRACORE2 16NP49-01-115STAVE HONEYCOMB CORE - CENTRECFRP HONEYCOMB UCF-126-3/8-2.0 ULTRACORE1 18NP49-01-116STAVE HONEYCOMB CORE - SMCCFRP HONEYCOMB UCF-126-3/8-2.0 ULTRACORE1 19 NP49-01-117EDGE CHANNEL - SMC LONGCFRP -1 20NP49-01-118EDGE CHANNEL - SMC SHORTCFRP -1 21 NP49-01-120POWER TAPE - TOPCu/KAPTON1 22NP49-01-121POWER TAPE - BOTTOMCu/KAPTON1 23NP49-01-125ALLCOMP COOLING STRIP - Z=0ALLCOMP K9 FOAM SN43 OR SN562 24NP49-01-129130nm STAVE COOLING TUBE ASSEMBLYTITANIUM/ALUMINA1 25NP49-01-1231.3m STAVE COOLING TUBE- DIA 2.275mmTITANIUM - CP21 26NP49-01-131INLET/OUTLET TUBE - 2.8 OD X 0.15 WALLTITANIUM - CP22 27NP49-01-126ELECTRICAL BREAK ASSYTITANIUM/ALUMINA2 28NP49-01-128ALUMINA INSERTALUMINA2 29NP49-01-127NIPPLE- 2.275 DIA TUBETITANIUM2 30NP49-01-131NIPPLE- 2.8 DIA TUBETITANIUM2 13 Stave Parts List