1. Services – First Considerations Sigi Wenig / Nicolas Massol ATLAS Tracker Upgrade Workshop Valencia December 2007
Existing services (in cryostat bore and on flange)
SCT, TRT, Pixel, Heater, DCS
Feed-through in Sector-1
Re-use of existing services – First considerations
New services – First considerations

2. Sigi Wenig / Nicolas Massol
First Comment
We performed already the first upgrade: Far Heaters
And for that we combined the 3 possibilities:
Use existing services without modification: Inlet pipes
Use existing services with modification: Cables
Install new services: Outlet pipes
 o.k.
 difficult but o.k.
 rather messy
WS Valencia 13-Dec-07
Sigi Wenig / Nicolas Massol

3. Existing Services – Summary
In total cables with 1432 associated cooling pipes
2 years of design work (Marco Olcese, Claude Menot)
112 installation drawings (flange)
144 detailed connectivity documents
30 detailed lists for cable installation sequence
200 man months (Jan 2006 – March 2007); includes
Cable installation on cryostat bore, on flange, partially up to PP2
No cable connection
Installation of associated cooling pipes/pipe-loops (also for Type-3 cables)
Pipe connections
Various materials (Cu, SS, Al)
Various diameters from 3 to 24 mm
Various connection types (brazing, crimp, Serto, Swagelok)
Various connection locations
At PPF1, on Flange, between LAr Boxes, at tile fingers, at PP2, on HS structure
WS Valencia 13-Dec-07
Sigi Wenig / Nicolas Massol

4. Existing Services – SCT (BA, EC)
4 088 multi-purpose cables [along Barrel – Z0 – HS]
Organized in 80 bundles with 4(3) layers (312 layers of 12 to 16 cables) and
320 associated cooling pipes with 736 crimp connections
Installed one by one
Very delicate/complicated endpoint/connectivity at PPB1/PPF1
3 months installation time with 8-10 people (based on final speed)
Up to tile fingers (synchronization with installation up to HS)
Includes wrapping with cooling pipes
144 readout fibres
Organized in bundles of 3 to 6 cables
Very rigid, very difficult to handle
Very delicate installation and complicated endpoint at PPB1/PPF1
2 Weeks installation time with 2-3 people
80 FSI fibres
Organized in 8 bundles
200 DCS cables
2 different types
WS Valencia 13-Dec-07
Sigi Wenig / Nicolas Massol

5. Existing Services – SCT
WS Valencia 13-Dec-07
Sigi Wenig / Nicolas Massol

6. Existing Services – Pixel
1 808 cables (LV, HV, NTC) [up to PP2]
Organized in 3 x 16 bundles with 32 associated cooling pipes
Installed one by one and in ensembles of 3
Rather large LV bundles
Robust connectivity at PP1
Delicate space limitation at small R
Very difficult/clumsy temporary folding-back/storage
2 months installation time 4-5 people
Up to PP2
Includes wrapping with cooling pipes
84 fibres
Organized in 2 bundles of 6 layers, each
Very rigid, very difficult to handle
48 DCS cables
WS Valencia 13-Dec-07
Sigi Wenig / Nicolas Massol

7. Existing Services – Pixel
WS Valencia 13-Dec-07
Sigi Wenig / Nicolas Massol

8. Existing Services – TRT (BA, EC)
cables (LV, HV, Signal) [up to PP2]
Organized in 416 harnesses with 128 associated cooling pipes
Installed by sets of 3 to 4 harnesses
Rather easy to handle (may-be a bit heavy)
Connector pockets for BA
Connector boxes for EC
2 months installation time with 2-3 people
Without up to PP2 (but temporary storage at tile fingers)
Without embedding around cooling pipes
WS Valencia 13-Dec-07
Sigi Wenig / Nicolas Massol

9. Existing Services – TRT
WS Valencia 13-Dec-07
Sigi Wenig / Nicolas Massol

10. Existing Services – Heater / DCS(ID)
779 heater cables
6 different types
Heater pads, evaporative cooling (3), feed-through heater pads (2)
High diversity
Complicated endpoint
Complicated connectivity
60 DCS(ID) cables
WS Valencia 13-Dec-07
Sigi Wenig / Nicolas Massol

11. Feed-through at Present
Feed-through of Sector-1
Organized in 4 layers
360 mm wide
25, 25, 22, 20 mm high
No considerable space available for additional cables
(Nearly) all remaining space filled by seal
WS Valencia 13-Dec-07
Sigi Wenig / Nicolas Massol

12. Feed-through Re-arrangement
FREE
With re-arrangement: 0.5 layer more
TRT
TRT occupancy: layers
Total gain: layers
WS Valencia 13-Dec-07
Sigi Wenig / Nicolas Massol

13. Re-use of Existing Services – First Considerations
The following actions on the existing services have to be taken (anyhow)
For the removal of the detector all Pixel cables have to be folded back again and the PPF1 region has to be completely dismounted (TRT boxes, SCT EC mountings)
All services on the cryostat bore have to be removed
SCT BA cables have to be cut, new connectors installed
TRT cables have to be removed and (at least) cut somewhere
All cable trays have to be removed
The PPF1 region has to be completely re-organized
New patch panel to connect services to detector
Attention: SCT EC cables may be too short
 In situ mounting of new connectors to (may-be) all 4088 cables (at least 1584)
New readout fibres have to be installed (at least 30)
For new Pixel B-Layer existing services can very probably not be used
If a considerable amount of additional cables are to be installed (e.g. 5 times more HV cables?), TRT services have to be removed
Feed-throughs are full
Potential envelope problems on flange (in z), in particular if crossing is necessary
And all this has to be done in an activated environment
WS Valencia 13-Dec-07
Sigi Wenig / Nicolas Massol

14. New Services – First Considerations (1)
Even though it is a pity to remove the existing services, it looks to us (after a first glance) more reasonable to re-start from scratch
The re-use of the present services configuration will very probably impose too many constraints given the increased number of channels, the different granularity, and the potential new cooling concept
To remove everything up to the tile fingers is not really a considerable effort, but will allow to restart from a clean situation
Activation aspect has to be considered also in this case
For the new services many things can be improved
Services can be re-designed as to avoid the actual diversity
Cable ensembles (harnesses) which include most functions and end in a “handy” connector
Detector/cable cooling can be freely re-considered
Re-organize PPF1 such that the connection from detector and from outside is easy and fast
In the spirit of the TRT solution, but less heavy
WS Valencia 13-Dec-07
Sigi Wenig / Nicolas Massol

15. New Services – First Considerations (2)
Main proposal would be
Try to design services such that all can be brought to PP2 through Sectors 1 and 9
4 feed-throughs per side
But Sectors 3, 7, 11, 15 are not completely excluded
Main open issue are
To clarified whether TRT type-3 cables can be re-used with intermediate patch-panel at PP2
How to re-organize PP2 to make use of the TRT space which will become available
How to organize the design effort
Need a new “couple” Olcese – Menot
In any case, services installation aspects have to be considered from the very beginning
WS Valencia 13-Dec-07
Sigi Wenig / Nicolas Massol