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PIXEL Detector Integration mechanical requirements

PIXEL Detector Integration mechanical requirements. H. Wieman Christie Integration meeting 16-May-2008. topics. Introduction – parameters and requirements cooling system space power heat load to wide angle hall. Pixel detector function. Topological D meson reconstruction

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PIXEL Detector Integration mechanical requirements

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  1. PIXEL Detector Integration mechanical requirements H. Wieman Christie Integration meeting 16-May-2008

  2. topics • Introduction – parameters and requirements • cooling system • space • power • heat load to wide angle hall

  3. Pixel detector function • Topological D meson reconstruction • Requires high precision vertex pointing • Critical parameters: • very thin, low X/X0 • very close to the interaction point

  4. Pixel geometry End view 8 cm radius 20 cm 2.5 cm radius Inner layer Outer layer  coverage +-1 One of two half cylinders total 40 ladders

  5. Some pixel features and specifications critical and difficult (ALICE Pixels 0.9%)

  6. Pixel air cooling system Air flow: 400 SCFM Total pressure drop: 22 inches water Temperature: 75 deg F/34 deg C or maybe -10 deg C Wide angle hall ISC external duct 6 in diameter X 50 ft Internal duct 2 in diameter X 5 ft chiller Internal duct 2 in diameter X 5 ft pump external duct 6 in diameter X 50 ft

  7. Pixel heat load break down

  8. Pump Air flow: 400 SCFM (300 SCFM maybe sufficient) Total pressure drop: 22 inches water 25 in 5 HP motor 11 in 18 in

  9. Chiller • Unit to be investigated • Requirements: • 2 – 3 kW • Temperature: 75 deg F/24 deg C or -10 deg C ? • flow 300-400 SCFM

  10. Infrastructure power load • Heat load to the hall: • Up to 2-6 kW if all dumped to air • Much less if chiller is cooled by chilled water or has compressor and radiator outside • AC power: 2-6kW • Chilled water: 2-6kW if used

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