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