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Published byBrice Greene Modified over 9 years ago
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Hybrid Mechanical/Thermal Design Ray Thompson / Manchester FP420 meeting Torino 11/12 July 06
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Detector assembly
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Started assembling components for first mechanical /thermal prototype tests 1.25 mm carbon-carbon plate thinned to 0.5mm in centre- 5mm plate on order
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Corner of Atlas wafer showing fiducial dots Hybrid Fiducials Stick off cuts on each hybrid in staggered fashion so all hybrid fiducials visible through end plates Survey entire stack detector to hybrid fiducial - hybrid fiducial to hybrid fiducial each measurement 1 micron so 1 detector to another detector on another hybrid 2 micron
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Detector Positioning on Hybrid Adapt atlas assembly stages to position detectors on both sides of hybrid relative to dowel holes. 3 detectors on one hybrid relative to each other - aim for positioning +/- 5 micron ( sigma 2.5 micron) - survey on one face each measurement sigma 1 micron Positioning Hybrid to hybrid via precision washers stuck to hybrid and dowels hole tolerance 3.000 to 3010 microns +/- 5 micron Stability after temp cycle ?????? 50mm x 40 deg x 5.10 -6 = 10 micron Flatness
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Atlas Sct Assembly stages Microscope camera xy translation stages
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X Y Vac chuck Translation stages Turn plate + locating dowels Microscope xyz travel Auto focus + pattern recognition Detector 1.Place detector on chuck - locate fiducially -translation stages align relative to transparent fiducials on turnplate Detector to Hybrid Alignment
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X Y Vac chuck Pickup chuck aligns on big dowels using kinematic touch bearings 2. Detector in correct place. Lower pickup chuck and change over vacuums Detector now aligned on first pickup chuck 3. Turn turnplate over. Repeat alignment process with 2 nd detector 2 nd detector now transferred to 2 nd pickup chuck Transfer chucks
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4Insert hybrid into turnplate using small alignment dowels 5Place in glue robot deposit glue pattern Hybrid gluing
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Vac chuck 6Replace pickup chucks on large dowels allow glue to cure Atlas experience : silicon to silicon positioning for 600 detectors sigma 2.5 microns
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Precision alignment washers Used on Atlas Sct Modules 3mm Diam 2mm Diam +1mm Tolerance 3.000 3.010 Wirecut Al +/- 5 micron
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Glue Robot- repeatabilitySmart scope – optical or touch probe survey to 1 micron
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Starting to get set up to do thermal measurements -IR camera - Thermocouples - SMD resistors
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Starting to put together First mechanical hybrid prototype End July instrument with smt resistors /thermocouples Atlas mechanicals for fiducials More pixel mechanicals would be useful Thermal August…….. Check crude thermal performance Thermal link solder / foil v grease joint Alignment August……. Check Stability of hybrid to hybrid positioning thermal cycling on Smart scope In the light of measurements /experience with mech prototype start mid and elec prototype start first full prototype - working chip(s), kapton September layout, controller card etc. Gas box, front window etc Full thermal simulation, - dynamic effects (MSSL) In parallel jigs and modifications for assembly stages Summary and aims
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