hybrid mechanical/thermal design ray thompson / manchester fp420 meeting torino 11/12 july 06
TRANSCRIPT
Hybrid Mechanical/Therm
al Design
Ray Thompson / Manchester FP420 meeting Torino 11/12 July 06
Detector assembly
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
Ccplate.jpg
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
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
Atlas Sct Assembly stages
Microscopecamera
xytranslation stages
XY
Vac chuck
Translation stages
Turn plate + locating dowels
Microscope xyz travelAuto focus + pattern recognition
Detector
1. Place detector on chuck - locate fiducially -translation stages align relative to transparent fiducials on turnplate
Detector to HybridAlignment
XY
Vac chuck
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 2nd detector 2nd detector now transferred to 2nd pickup chuck
Transfer chucks
4 Insert hybrid into turnplate using small alignment dowels
5 Place in glue robot deposit glue pattern
Hybrid gluing
Vac chuck
Vac chuck
6 Replace pickup chucks on large dowels allow glue to cure
Atlas experience : silicon to silicon positioning for 600 detectors sigma 2 .5 microns
Precision alignment washers
Used on Atlas Sct Modules
3mm Diam
2mm Diam +1mm
Tolerance3.0003.010
Wirecut Al+/- 5 micron
Glue Robot- repeatability Smart scope – optical or touch probe survey to 1 micron
Starting to get set up to do thermal measurements-IR camera- Thermocouples- SMD resistors
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