1. TEC assembly and commissioning at Lyon
21/04/2019
Nick Lumb

2. Overview What do we want to do? How can we do it?
Discussions with industry
Conclusions
21/04/2019
Nick Lumb

3. Technical Goals Assembly of one full endcap
Test as fully as possible before shipping to CERN
Mechanical properties/alignment
Services (HV, LV, optical links, TEC cooling system etc.)
Alarms and interlocks
DAQ system
Overall DAQ performance
Sensor noise
Sensor signal (cosmics)
Scale: “tower” level (limited by cost and material constraints)
Safe manipulation of TEC: on-site and during transport
21/04/2019
Nick Lumb

4. Strategy (1) Operation at ambient temperature
Petal insertion
Fast testing of individual sectors and whole disks
Easy access for personnel at any point during testing
Cooling loop with coolant at elevated temperature (e.g. 10°C)
Requires controlled humidity (30% RH at 22°C->dew point 2°C)
“Default” mode of operation
Operation at CMS temperature (-10°C)
To study, under realistic conditions, at the earliest opportunity
Mechanical deformations
Performance of cooling system and humidity control
Slow control (temp./humidity measurement, alarms, interlocks)
Impact on sensor performance
21/04/2019
Nick Lumb

5. Strategy (2) Operation at -10°C (cont.) TEC coolant at -20°C
Requires ambient cooling to at least -10°C
Dew point must remain below coolant temperature
Possibility of very dry atmosphere desirable
Harsh environment for personnel
Tests in this mode less frequent, longer-term
21/04/2019
Nick Lumb

6. Strategy (3) TEC handling and orientation
“Horizontal” is easier for testing and necessary for cosmics tests.
“Vertical” is more realistic for integration and deformation studies, and probably better for transport.
Need support structure capable of rotating TEC about horizontal axis.
Could be fixed to TEC until just prior to insertion into tracker
Requires collaboration with Aachen (discussions soon)
21/04/2019
Nick Lumb

7. Working specification (1)
Existing structure:
Domed building with glass fiber walls, diameter ~16m
Crane (max. load 1500kg)
Services: power (30+11kW – will need more), water, alarm system, electrical screening (Faraday cage), storm protection
Build interior structure: 12m x 8m x 4m (height)
Barracks room: 4m x 8m x 3m
Control room: PCs, electronics racks
Standard air conditioning (22°C±2°C)
Prefabricated structure
21/04/2019
Nick Lumb

8. Proposed installation
21/04/2019
Nick Lumb

9. Working specification (2)
Cold room: 8m x 8m x 4m
Endcap assembly and test area
Standard air conditioning with fresh air intake during ambient temperature (22°C±2°C) operations
Cold-room rated walls, floor and ceiling
Cooling and de-humidification by recycling of air and condensation removal by thermal cycling (no exchange of air with outside during cold operations)
Option: de-humidification using silica gel rotors (water removed from outside air then cooled)
Class laminar flux installation (4m x 4m) at centre of zone (to prevent particle settlement on TEC and sectors)
Large door for eventual removal of TEC
Isolated from outside light sources
21/04/2019
Nick Lumb

10. Cold room set-up
21/04/2019
Nick Lumb

11. Commercial offers (1)
Technical proposals and pricing from 3 independent Lyon-based companies
Together they address all of the variants in our working specification:
Dehydration by cooling with condensation removal (closed air circuit)
Water removal using silica gel rotors
Different approaches to coupling of air circulation systems (air conditioning, laminar flux, cold and dry air)
Total power consumption ~40kW + 15kW zone 1
21/04/2019
Nick Lumb

12. Conclusions
Have investigated in some detail the possible scenarios for TEC assembly and test facility at Lyon.
Have made contact with industry and know what is feasible within reasonable budget.
Detailed Call for Tender has been prepared and submitted for publication.
Start of installation planned for first quarter 2003.
21/04/2019
Nick Lumb

13. Test sequence Petal delivery Fast tests before insertion into TEC
Insertion into TEC (delivered with fully equipped and tested services end 2003)
Quick tests at room temperature
Equip full FEC ring and read out at -10°C
Equip full “tower” and read out at -10°C
21/04/2019
Nick Lumb

14. Full “tower” requirements
21/04/2019
Nick Lumb

15. Overall requirements
21/04/2019
Nick Lumb