1. 4366-ILD-T-Platform-and-environment.ppt A. Hervé Seoul workshop 17 February 2009 Concept of Platform and Environment A. Hervé / ETHZ@CERN ILD-Webex meeting 17 February 2009

2. 4366-ILD-T-Platform-and-environment.ppt A. Hervé Seoul workshop 17 February 2009 ILD Detectors Design N.S. ETH-Z, January 2009. Conceptual view of Push-Pull IP Garage

3. 4366-ILD-T-Platform-and-environment.ppt A. Hervé Seoul workshop 17 February 2009 False floor modules to compensate platform height Towers for near-by services Services On IP Two Experiments, two positions

4. 4366-ILD-T-Platform-and-environment.ppt A. Hervé Seoul workshop 17 February 2009 ILD 1 Beam Pipe position ILD Service position Services False floor modules can be rearranged to modulate working space disposition in garage position Two Experiments, two positions

5. 4366-ILD-T-Platform-and-environment.ppt A. Hervé Seoul workshop 17 February 2009 Tentative horizontal separations

6. 4366-ILD-T-Platform-and-environment.ppt A. Hervé Seoul workshop 17 February 2009 Increased lateral space to work on muon system by shifting one false floor module muon Valve box Dewar and local services

7. 4366-ILD-T-Platform-and-environment.ppt A. Hervé Seoul workshop 17 February 2009 Design N.S. ETH-Z, January 2009. Possible Cavern radius (~14m) Crane 18m An effort has been made to reduce the radius of the Underground Hall

8. 4366-ILD-T-Platform-and-environment.ppt A. Hervé Seoul workshop 17 February 2009 We have played on three parameters to try to reduce hall diameter 1 2 3 Height of supports Crane clearance Pillar for Q0

9. 4366-ILD-T-Platform-and-environment.ppt A. Hervé Seoul workshop 17 February 2009 Q0 Pillar shifted connection by flexible lines 4m Simple opening in garage position using last Matthieu’s drawing Design N.S. ETH-Z, January 2009.

10. 4366-ILD-T-Platform-and-environment.ppt A. Hervé Seoul workshop 17 February 2009 Q0 recessed in endcaps 4m Design N.S. ETH-Z, January 2009.

11. 4366-ILD-T-Platform-and-environment.ppt A. Hervé Seoul workshop 17 February 2009 2 m Design N.S. ETH-Z, January 2009. Q0 recessed and Central Barrel shifted 6m

12. 4366-ILD-T-Platform-and-environment.ppt A. Hervé Seoul workshop 17 February 2009 2 m Design N.S. ETH-Z, January 2009. 6m Small alcove allowing to decouple Q0 from endcap Top view

13. 4366-ILD-T-Platform-and-environment.ppt A. Hervé Seoul workshop 17 February 2009 Advantages of platform for push-pull operation The use of a platform is well adapted to ILD sectioning and construction. With the use of airpads and indexing system, this should allow a millimetric repositioning. The presence of the platform can be taken advantage of to isolate the experiment from seismic events and from surrounding vibrations.

14. 4366-ILD-T-Platform-and-environment.ppt A. Hervé Seoul workshop 17 February 2009 The CMS plug is good example of a platform rails 22 m 2m thick 2000 tons PLUG

15. 4366-ILD-T-Platform-and-environment.ppt A. Hervé Seoul workshop 17 February 2009 Example of anti-sismic supports that could be installed below the platform