1. ITS TGeo geometry Status and challenges By Bjørn S. Nilsen The Ohio State University

2. Contents Status of Central Barrel –SPD –SDD –SSD –Thermal shields Status of RB24 & RB26 side –Support cones –Cables, cooling tubes, and ducts –Patch panels, cable trays, and Shoe boxes –ITSAMS system Material Definitions Service code –Step manager –Module decoding routines –Simplified geometry for fast display http://www.to.infn.it/~tosello/EngMeet/ITSdraw/ http://www.to.infn.it/~tosello/EngMeet/EngMeet.html

3. Sensitive volume must have thin direction in Direction Z direction || to ALICE Global Z direction Must follow ALICE naming and numbering conventions Sensitive volume name ITS1, ITS2, ITS3, ITS4, ITS5, & ITS6. Note, layer, Ladder, and Detector numbering schema not allowed (does not follow ALICE standards). Follow hardware conventions when ever possible –Avoid inversion –Use measured positions when known Make Detectors repositionable independent of other non- sensitive objects Make volume/object names meaningful Note, location of non-sensitive material known to about 1mm absolute only. Central Barrel Requirements/Rules

4. SPD Central Barrel SPD Carbon Fiber Sector  Half staves  –Ladder Grounding shield Pixel detector bump bonds Read out chip –Kapton/Al cable –Stave end chips –Solder joints Mounting clip  Cooling tubes  Thermal Shield  http://alice.pd.infn.it/latestdr/index.html

5. SDD Central Barrel Ladder  Detector  Sensitive volume ? Front end  –Capacitors –Chips ? Kapton/AL cables  Thermal Shield  Cooling tubes  Ladder end electronics ? Ladder end cables & tubes ? Ladder Support Ring ? http://www.to.infn.it/~giraudo/disegni.html 2 SDD ladders :

6. SSD Central Barrel Ladder  Detector  –Sensitive volume ? Front end  –Capacitor ? –Chips ? Cooling tube  Kapton/Al cables  Ladder end electronics ? Ladder Support ring  Thermal shield  Al-Mylar outer shield  http://www.to.infn.it/~tosello/EngMeet/ITSdraw/SSD/SSD_drawings.html

7. SPD Services details RB24 Open side Very Old Calculation

8. SPD Services Support Cone (copy needed) Kapton/Al Cables  –Cable joints Cooling tubes  Cooling manifold  –Cu block –Soldered Cu tubes Patch Panels –Connectors  –Cables  Cable Trays (Guess)  –Cables  Shoe Boxes  –Connectors –Cables –Electronics Support Cone  Kapton/Al Cables  Cooling tube loops  Patch Panels –Connectors  –Cables  RB24 open Side RB26 Side Muon Cable Trays  –Cables  Shoe Boxes  –Connectors –Cables –Electronics

9. SDD Services Support Cone  Kapton/Al Cables  Cooling Tubes  Patch Panels  –Connectors  –Cables  Cable Trays (Guess)  –Cables  Shoe Boxes  –Connectors –Cables –Electronics Support Cone  Kapton/Al Cables  Cooling Tubes  Patch Panels  –Connectors  –Cables  RB24 Open sideRB26 Muon side http://alice-its.web.cern.ch/Alice-ITS/ Cable Trays  –Cables  Shoe boxes  –Connectors –Cables –Electronics

10. SSD Services Support Cone (old design)  Kapton/Al Cables  Cooling Tubes  Patch Panels  –Connectors  –Cables  Cable Trays (Guess)  –Cables  Shoe Boxes  –Connectors –Cables –Electronics Support Cone (old design)  Kapton/Al Cables  Cooling Tubes  Patch Panels  –Connectors  –Cables  RB24 Open side RB26 Muon side http://alice-its.web.cern.ch/Alice-ITS/ Cable Trays  –Cables  Shoe boxes  –Connectors –Cables –Electronics

11. ITSAMS/Other SSD cone wings  Mirrors  Patch panel  Cable Tray  Shoe Box  TPC mounted Camera  ITS-TPC Mounting Brackets  FMD/T0 RB24/RB25 –Patch Panel  Connectors  Cables  –Cable Trays  Cables  –Shoe Box  Connectors  Cables  Electronics  http://www.physics.ohio-state.edu/HIRG/ITSAMS/

12. Material Definitions SPD Central –Dummy only SDD Central –Mostly done SSD Central –Partly done Services –Dummy only StepManager (SDD only), Detector decoding SDD http://www.to.infn.it/~tosello/EngMeet/ITSmat/SDD/0_SDDmat.html

13. Conclusion Good start –Much new code still needs to be committed Much work still to be done SPD services a high priority for FMD and PMD background.