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ATLAS Tracker Upgrade - Services at Barrel Ends:

ATLAS Tracker Upgrade - Services at Barrel Ends:. Scenario where services are routed through existing services channels on cryostat shown on the next 3 slides ie: Old TRT channels used for fibres, power and sensor cables and input cooling pipes Old SCT cooling exhaust channels used for same

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ATLAS Tracker Upgrade - Services at Barrel Ends:

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  1. ATLAS Tracker Upgrade - Services at Barrel Ends: Scenario where services are routed through existing services channels on cryostat shown on the next 3 slides ie: Old TRT channels used for fibres, power and sensor cables and input cooling pipes Old SCT cooling exhaust channels used for same purpose in the Upgrade Could possibly work for 108 supermodules (with lots of manifolding for cooling pipes) Wouldn’t work if outer barrels were included – these would need to use existing power cable channels but there would be no space in the existing cooling exhaust channels, so new channels eg one per quadrant would have to be created in order to keep each set together for maximum cooling efficiency. Design of layout on the cryostat is crucial to the design of the layout on the barrel ends!

  2. 7 7 rows per Quadrant: 6 exhaust pipes to ‘old’ cooling channel in cryostat exhaust manifold 11 6 9 input pipes in ‘TRT’ channels (need manifolds) 5 7 4 7 Evap. cooling routing off barrel end. 5 6 4 input exhaust exhaust manifold 3 45.0 22.5 3 11.25 half length cooling loops TJF 28/06/07

  3. rows per Quadrant: exhaust cooling only 11 9 power and sensor cables go in old TRT channels 7 power and sensor cables in 4 dedicated channels per quadrant shown as one ‘bunch’ per supermodule 45.0 22.5 11.25 TJF 28/06/07

  4. exhaust cooling only rows per Quadrant: 11 9 power, sensor cables, fibres and input pipes go in old TRT channels 7 single fibres ribbon optofibre routing: one fibre from each PCB joins one 12 way ribbon: 9 ribbons per quadrant 45.0 22.5 11.25 four PCBs per supermodule TJF 18/07/07

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