# Presentation: 485300

## Work Plan

- W. Miller
- iTi
- M. Cepeda, S. Dardin, M. Gilchriese, C. Haber, R. Post
- LBNL
- February 6, 2007

## Prototype Recap

- Slightly squashed tube
- Requires less development(with CGL adhesive, baseline)
- Sufficient for mounting silicon/electronics for critical electrical performance evaluation
- Use to debug fabrication and for non-destructive mechanical tests
- Round tube with graphite foam
- Requires more development to figure out how best to bond foam to tube(and tube size) – see next page
- To extent believe CO2 is likely coolant candidate, doing this second works out some of the bugs in fabrication with squashed tube stave

## Graphite Foam

- Just starting this(last week)
- First trial is POCO foam sample machined to current dimensions bonded to round tube
- Learning how to machine
- More samples in progress
- Properties via link on wiki

- http://phyweb.lbl.gov/atlaswiki/index.php?title=ATLAS_Upgrade_R%26D_-_Mechanical_Studies

- Very recent thermal calculations indicate can reduce tube OD(eg. 2.8 mm calculated to be OK)
- Tradeoff possible between tube OD and foam machining practicalities. Impact on radiation length small.

## Tooling

- Vacuum and other tooling for assembly of stave “core”
- Design complete(see wiki for models and drawings)
- Shop fabrication largely complete. Pictures will appear on wiki
- Modifications inevitable as we go through process
- “Tooling” and procedures for layup of facings and other parts
- Has been some time since we did this(years)
- Reconfiguring pixel construction area, finding old tooling
- Get autoclave and cutting going again
- Just in progress, will take some weeks given other demands
- Tooling for silicon detector and hybrid placement and wire bonding
- Concepts sketched
- Models/drawings just getting underway

## Stave Mechanics Fabrication

- Qualification and test samples(partial list)
- Facing layup samples(remember how to do this)
- Honeycomb bonding samples – need trial although similar done before
- Foam bonding samples - started
- Shear modulus samples
- Facings+honeycomb
- Facings+honeycomb+tube(squashed)
- Facings+honeycomb+tube+graphite foam
- Thermal performance samples
- Roughly 35 cm long. Parallel tube(not U-tube)
- Squashed tube first. Graphite foam-round tube later
- Heater configuration and type is TBD.
- Production – 3 total full-length
- Full-length, squashed tube(1) -> Non-destructive mechanical tests -> Carl for silicon loading
- Full-length, round tube(1) -> Non-destructive mechanical tests -> RAL for silicon or ?
- 3rd full length(1). Tube type TBD later -> thermal/mechanical tests?

## Mechanics Parts - Plan

## Electrical Parts - Plan

## Overall Plan

| Month | Mechanical | Electrical |
| --- | --- | --- |
| February | Tooling fab. Setup.
Facing fab | Hybrid submit 2/15
Design |
| March | Parts fab and test
Full-length trial setup | Hybrid fab underway
Design |
| April | Squashed tube full-length
Sample test | Start load sfixture fab
Start bus cable fab |
| May | Round tube- full length
Sample test | Finish fixtures/trials
Load/test hybrids
QC bus cable |
| June | 3rd core and test | Load stave/test 1 by 1 detector/hybrid |
| July | Thermal and mechanical testing | Load stave/test 1 by 1 |
| August | Thermal and mechanical testing | Load stave/test 1 by 1 |
| September |  | Testing |