ITS TGeo geometryStatus and challenges

By

Bjørn S. NilsenThe Ohio State University

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

• 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

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) y

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

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 :

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

SPD Services detailsRB24 Open side

Very Old Calculation

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

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 side RB26 Muon side

http://alice-its.web.cern.ch/Alice-ITS/

• Cable Trays – Cables

• Shoe boxes – Connectors– Cables– Electronics

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

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/

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

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.