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PIXEL Mechanical

PIXEL Mechanical. H. Wieman face to face Integration 15-May-2008. topics. Introduction – mechanical design Pixel specifications and parameters Review insertion mechanics Kinematic mounts air flow analysis cooling air requirements. Pixel geometry. End view. 8 cm radius. 20 cm.

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PIXEL Mechanical

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  1. PIXEL Mechanical H. Wieman face to face Integration 15-May-2008

  2. topics • Introduction – mechanical design • Pixel specifications and parameters • Review insertion mechanics • Kinematic mounts • air flow analysis • cooling air requirements

  3. 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

  4. Some pixel features and specifications critical and difficult (ATLAS Pixels 1.2%)

  5. New details on kinematic mounts

  6. Pixel kinematic mounts

  7. Pixel kinematic mounts

  8. Pixel kinematic mounts

  9. Pixel kinematic mounts

  10. Pixel kinematic mounts

  11. preliminary air flow study • ANSYS CFX FEE Flow analysis • simplified geometry to limit mesh • input velocity 8 m/s down module support tube • ISC blank off to force return flow over silicon surfaces • Result: • good flow velocity over both inner and outer silicon

  12. 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

  13. Pixel heat load break down

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