1. Sub-Detector Assembly Area Summary of discussion at ALCW2015
2015/9/1
Yasuhiro Sugimoto
@ILC Infra/CFS mini-WS

2. Discussion at ALCW2015
For consideration of facilities required for Central campus/IP campus (assembly space, office space, etc.), each sub-detector should clarify the assembly scenario
One session of ALCW2015 Vertex/Si Tracking sessions was dedicated to this discussion
Assembly scenarios of the following sub-detectors were presented
Vertex/Si Tracker
TPC
ECAL
AHCAL
SDHCAL

3. A tentative design of IP campus
Surface buildings
(from presentation by M. Miyahara)

4. Assembly hall For ILD, assembly hall is used for
Iron yoke assembly
Solenoid assembly and installation
Installation of HCAL, ECAL, and Muon detector
Field mapping
Assembly and test of sub-detectors should be done in another building in IP campus or in Central campus

5. Preliminary Central campus Preliminary conceptual design exists
Functions and area of facilities are tentatively listed up
Details of each facility are not designed yet
Preliminary
(M. Miyahara, AWLC14)

6. Central campus
(M. Miyahara, AWLC14)

7. ILD Si trackers (by Y.S.)
Si trackers inside TPC – Inner tracking system (ITS)
Vertex detector (VTX)
Silicon Inner Tracker (SIT)
Forward Tracking Disks (FTD)
VTX is supported from beam pipe
SIT, FTD, and beam pipe are supported from Inner Support Structure
Si trackers outside TPC
Silicon External Tracker (SET)
Endcap Tracking Detector (ETD)
Supported from TPC or ECAL

8. Inner Tracking System

9. Clean room in research building
Assembly scenario 1-a
Sensor chip
RO ASIC
Ladders
CFRP ladder base
Clean room in research building
Detector hall
VTX half barrels
Support structure
Beam pipe .
SIT half barrels
ITS
Final check
ILD
FTD half disks
University
/ Institute
Company
IP campus

10. Clean room in research building
Assembly scenario 1-b
Sensor chip
RO ASIC
Ladders
CFRP ladder base
Clean room in research building
Detector hall
VTX half barrels
Support structure
Beam pipe .
SIT half barrels
ITS
Final check
ILD
FTD half disks
University
/ Institute
Central campus
Company
IP campus

11. Clean room in research building
Assembly scenario 1-c
Sensor chip
RO ASIC
Ladders
Clean room in research building
CFRP ladder base
Detector hall
VTX half barrels
Support structure
Beam pipe .
SIT half barrels
Final check
ITS
ILD
FTD half disks
University
/ Institute
Central campus
Company
IP campus

12. Clean room in research building
Assembly scenario 2-a
Sensor chip
RO ASIC
Ladders
CFRP ladder base
Clean room in research building
Detector hall
Support structure
VTX half barrels
Beam pipe .
SIT half barrels
ITS
Final check
ILD
FTD half disks
University /
Institute
Company
IP campus

13. Clean room in research building
Assembly scenario 2-b
Sensor chip
RO ASIC
Ladders
Clean room in research building
CFRP ladder base
Detector hall
Support structure
VTX half barrels
Beam pipe .
SIT half barrels
ITS
Final check
ILD
FTD half disks
University /
Institute
Central campus
Company
IP campus

14. Comparison of scenarios
Examples
Belle-II SVD: (a la 1-a)
Ladders are assembled in universities & institutes
Ladders are shipped to KEK, and full barrel is assembled at KEK
CMS Silicon Tracker: (a la 2-b)
TIB, TOB, TID, TEC are assembled in universities & institutes including CERN
These modules are assembled into a Silicon Tracker at Tracker Integration Facility (350m2) at CERN main campus
Silicon Tracker is transported overnight to Point 5 for installation
ATLAS Inner Detector: (a la 2-a)
Sensor modules are assembled in universities & institutes
SCT barrel is assembled in Oxford University
SCT barrel is shipped to CERN inner detector integration facility
Less number of transport is preferable
Less risk of damage
Inspection/test is necessary after each transport
But transportation is manageable
Many examples such as detectors for LHC
It seems there is no show-stopper in every scenario
CMS Silicon Tracker
Shipping container for
ATLAS SCT barrel

15. Space requirement
We could build Silicon Tracker Integration Facility either in Central campus (1-b, 1-c, 2-b) or IP campus (1-a, 2-a)
Even in case of 1-b, 1-c, and 2-b, a similar space, which can be shared with other sub-detector, would be necessary for maintenance or temporally storage 5m
VTX
SIT
FTD
A possible layout of
Silicon Tracker Integration
Facility (150m2)
ITS 5m
(Small hoist here)
15m

16. Si trackers outside TPC
Assembly scenario depends on the support scheme
From TPC? (baseline in TDR)
From ECAL?
We cannot draw the assembly scenario unless we decide the support scheme and the assembly scenario of supporting detector is clarified

17. TPC (by J. Timmermans) Experience for ALEPH Suggestion for ILD
Sectors are shipped to CERN
Assembly and test in Bldg129 (main campus, ~200m2) for few years
Whole TPC is transported to Pit-4 (~20km away from the main campus)
There was ~100m2 space in Pit-4 for TPC
Suggestion for ILD
Assembly and test at Central campus, which takes few years
Large and clean area in Central campus

18. TPC Some comment on Jan’s suggestion
For LEP, a building in the Main Campus had already existed when the construction started
For ILC, buildings at Central campus and IP campus will get ready at almost the same time
So, there is no strong reason to assemble and test TPC at Central campus

19. ECAL (by H. Videau) ECAL consists of 8 staves
Each stave made of 5 modules has weight of ~10t
Support cradle is few tons
Require 900m2 (500(B)+400(E)) space for storage, assembly, and test
If this space is at the central campus, ~15t transportation has to be considered

20. AHCAL (by K. Gadow)
Modules (16/ring x 2rings) for barrel and towers for end-cap are shipped to the central/IP campus
~20 ton / module
200m2 space is necessary for storage and test of modules/towers
2x20t cranes
Air-conditioned
16 modules are assembled to a full half barrel in front of the solenoid, and pushed into the solenoid
Sensitive layers are installed after installation of module structures

21. ? SDHCAL (by I. Laktineh) SDHCAL barrel consists of 5 wheels
Each wheel consists of 8 modules
Weight of a wheel is 88 (+37) ton
Two scenarios of the wheel structure assembly
Assembly in industry / campus
Assembly in assembly hall
Each SDHCAL endcap consists of 4 modules
Each module weighs 50 (+22.5) ton ?
2 endcaps

22. SDHCAL GRPC detectors are inserted in assembly hall
Surface of 1000m2 is needed for assembly, and 200m2 for storage (5 wheels and 2 endcaps)
There is not enough space in assembly hall
Calorimeter assembly building at IP campus might be necessary (Transportation of wheels to assembly hall by a special trailer such as “Super Carrier” or air-pads)
GRPC insertion
with specific tool
Common services
Ready to be connected

23. Summary We should not forget about space for Muon detectors and SiD
Space requirement
Trailer
Si trackers
~150m2 clean room in IP campus and/or Central campus
TPC
~200m2 / 0m2 clean room in Central campus
~100m2 / 200m2 clean room in IP campus
ECAL
~900m2 space with crane in Central campus or IP campus
15 t
HCAL
AHCAL option
~200m2 air-conditioned space in Central campus or IP campus
20 t
SDHCAL option
~1200m2 space in IP campus or Central campus (Transportation challenge in Central campus case)
11 t or 125 t
Total
1450m2 (AHCAL option) / 2450m2 (SDHCAL option)
We should not forget about space for Muon detectors and SiD
Space for pre-assembly of iron yoke modules would be needed
ECAL and SDHCAL group assume parallel assembly of the barrel part and the endcap part
Barrel part and endcap part can be assembled in series to reduce the space requirement (?)

24. Back-up slides

25. A possible ILD assembly timeline