Hybrid Mechanical/Thermal Design FP420 Ray Thompson Julian Freestone, Andy Elvin

Detector pockets Beam pipes Beam line Cryo interfaces mm

Manchester responsible for detector Hybrid precision assembly Materials Carbon –Carbon Silicon/Aluminium alloys Possible hybrid and Station Designs ~10 hybrid planes /station 3D silicon Detectors + bumped to Atlas Readout chip Detector positioning to few microns Use atlas SCT equipment Low mass in detector area -20 c Heat removal Controller Chip

Possible precision mounting of detector station assembly

Initial thermal measurements SMT resistors to simulate chips Water 15C 3D Survey using Smartscope Alignment Dowel Spring force Hardened Rod Touch Bearings for alignment Fiducial Dots

Future Further integration with electrical design. Thermal / stress finite element simulation – Mssl Jan N ext round of mechanical models - Silicon Resistors from Chris Kenny Aim for working prototype in test beam for August Longer Term Design Review Nov 07 Production 08 Assembly / Instalation winter 08/09