1. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-43521 IRENG07 Workshop: 17 Sept. 07 Various Possibilities for disposition of Experimental Area A. Hervé/CERN

2. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-43522 Contents Starting point and Hypotheses Comments on Surface Assembly and Heavy Lifting Various dispositions of Experimental Area –RDR design –Two Large Offset Shafts –One Large Offset Shaft Possible Underground-Hall Parameters Conclusions

3. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-43523 Starting Point Difficult to equip ILC with two independent IRs. Choice of Push-Pull scheme to exchange experiments frequently, say every month or so Exchange must be done quickly, say in three days. Goals are ambitious, however, I concluded that they can be met, but this cannot be for free. Part of the saving from doing away with a second IR will have to be invested to provide a well-engineered, efficient and safe push-pull system.

4. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-43524 Hypotheses for this study Chosen site is a ‘Deep Site’, say 100 m deep or so. ‘Surface Assembly’ scheme followed by ‘Heavy-Lifting’ à la CMS is used. The ‘Larger Detector’ will drive the requirements (I have used GLDc as example here). If the other one is a ‘Smaller Detector’, it will benefit from improved facilitities.

5. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-43525 Moving platform is the technically safe solution… To move quickly and safely a 12’000-ton (or so) large composite object is not easy and a dedicated platform would do the trick. The two experiments will certainly be two projects largely independent from the machine, in organization and financing. It is thus very important to provide a well-defined interface from which all parties can design with different time scales (Civil Engineering needs to go in construction earlier than experiments). The platform would allow the detector to be commissioned in the garage position and moved in a nearly working state towards IP..

6. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-43526.. And a clear interface for organization Collaboration could be responsible for opening, maintening, closing, and operating its experiment above the platform ILC machine could be responsible for moving the platform carrying a detector to the beam position, and from it to the garage positions. Mainly beam line would need to be re-connected (and re-aligned), in a common effort.

7. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-43527 A concrete platform will be stiff enough The platform project will be reviewed in detail tomorrow by John Amman at 11:50. A 2’500-ton load on the CMS cover : 20 m between supports and 3 mm sag

8. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-43528 IRENG07 Workshop: 17 Sept. 07 Some comments on - Assembly on Surface - Heavy Lifting

9. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-43529 SX5 20m shaft to expt cavern 12m shaft to service cavern Oct 2000 Pre-assembly of CMS in SX5 has isolated us from tricky underground Civil Engin. and schedule pressures view in Oct. 2000 Civil engineering is going on during construction of experiment

10. Elements are fully cabled to local racks. All services, gas and water cooling pipes are there. Subdetectors are fully commissioned. Once below they can be connected to the umbilical cables going to the counting rooms through the cable chains. Elements fully commissioned ready to be lowered (for example YE+1)

11. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-435211 Opening the plug under the 2000-ton load Plug 1 2 1 3 4

12. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-435212 Interference with surface building roof is minimal First heavy lift with the 350-ton Hadronic Forward Calorimeters Nov. 06

13. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-435213 Heavy Lifting reviewed by Hubert Gerwig Tuesday 10:50

14. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-435214 IRENG07 Workshop: 17 Sept. 07 Experimental Area Two Large Shafts RDR Design

15. Side pressurized Egress tunnels connected to stairs/lifts Common to all designs Started with RDR design Two Large shafts direction above U-Hall Strong interference in Logistics and Safety between Shafts and Detector Areas RDR design has been put aside looking for better solutions Difficult to position lifts and stairs Safety problems during ALL handling operations

16. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-435216 IRENG07 Workshop: 17 Sept. 07 Experimental Area Two Large Offset Shafts

17. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-435217 The shafts are moved outside the main cavern The two shafts are positioned outside the footprint of the main underground hall to to do away with interferences (in safety and schedule) between loading/unloading areas and working areas. This solution has been used for 3 of the 4 LEP experiments, Aleph, Delphi, Opal. It needs horizontal transfer of loads but this is well adapted to the full surface assembly scheme.

18. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-435218 Two shafts with lift/stairs services 80-t crane access from surface 9m shaft for machine service Two Large Shafts outside the Footprint

19. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-435219 Two Large Shafts - With experiments Two asymmetric 40-ton cranes can be ganged to move around 80-ton pieces Room for shielding wall if needed 40-t

20. Two Large Shafts with possible dimensions 90 m

21. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-435221 Utilities at both ends of Hall Small service caverns for cooling and ventilation skids, transformers.. See Andrea Gaddi’s talk at 16:50 today

22. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-435222 Stairs & Lift +services Potential risk of structural weakness on this side

23. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-435223

24. Two Large Shafts - Phase I Civil Engineering Turf

25. Two Large Shafts - Phase II

26. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-435226 Gantry can be shifted (without load) from one shaft to the other one

27. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-435227 Ventilation Building ducts go under the shaft covers

28. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-435228 IRENG07 Workshop: 17 Sept. 07 Experimental Area Two Large Shafts Offset Diagonally wrt IP

29. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-435229 The two large shafts are moved outside the main cavern diagonally To have a more symmetric design for the cavern, and have all shafts well separated, we can move them diagonally wrt. IP This scheme seems better than the previous one, very similar in logistics apart for the surface hall

30. Two Large Shafts in Diagonal to reduce structural weakness on the side of the two shafts

31. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-435231

32. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-435232

33. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-435233 For the Experiments in the Underground Hall there is no difference

34. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-435234

35. Elements could be lowered at an angle and rotated in the Transfer Tunnel

36. For one Large experiment space in between the two shafts looks OK

37. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-435237 For two experiments, it is too crowded Civil Engineering turf during phase I

38. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-435238 Two Halls can be separated, and still Gantry (possibly cover) could be shared

39. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-435239 IRENG07 Workshop: 17 Sept. 07 Experimental Area Only One Large Shaft

40. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-435240 One Large Shaft only This solution has been looked at at the suggestion of Andrei. There is a potential saving However, the symmetry between the two experiment is broken, and one is necessarily better served than the other

41. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-435241 One Large Shaft - General view. Main service cavern machine & Exp B Second service cavern Exp A A B Main 18 m shaft Secondary9 m shaft

42. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-435242 Top view. Pressurized Egress tunnels connected to stairs/lifts Second service cavern Exp A Main service cavern machine & Exp B Access 20-t loads Exp B Access Heavy Loads 80-t loads Exp A & B

43. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-435243 18 m Lift Stair 80-t crane Exp A & B 9 m Lift Stair 20-t crane Machine & Exp B Main ventilation ducts And services Exp A Side view

44. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-435244 Movements of Experiment A Exp B 1 2 3 1: to main unloading zone 2: to garage position and leave space for experiment B in unloading zone 3: beam/garage position A This side of the cavern has to be longer by at least 10 m

45. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-435245 Movements of Experiment B 3 2 1 1: to main unloading zone 2: to garage position 3: beam/garage position

46. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-435246 B A Surface 1st phase 3 80-ton cranes 19-m crane hook Civil Engineering turf during construction of the experiments in the surface assembly hall

47. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-435247 B A Surface 2nd phase 2 80-ton cranes 19 m crane hook 1 80-ton cranes 12 m crane hook Trucks

48. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-435248 Lift stairs Cover Solving interference Cover/Lift in Large shaft One solution with rectangular cover

49. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-435249

50. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-435250 IRENG07 Workshop: 17 Sept. 07 Experimental Area Underground Hall Parameters for Two Large Shaft Solution

51. Hall Parameters - Length around 90 m Space reserved for shielding wall 8 m working corridor, could be from 0 to 100% on any one side of experiment in 2-m increments, using ‘working platforms’ to fill the gaps Space for ancillaries recovered from curved end-wall Maximum stroke 28m

52. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-435252 Transfer tunnel 31 m 5.6m 9m Hall Parameter - Width Transfer Tunnel allows easy extraction of ‘Tracking Device’

53. 1 31 m 11 m 9 m Hall Parameter - Width Depends of Crane Reach and Pacman Region 2 28 m GLDc Two 40-t cranes with asymmetric crabs This bottom space is ‘free’ because of the invert Top used by ventilation ducts

54. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-435254 IRENG07 Workshop: 17 Sept. 07 Conclusions

55. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-435255 Conclusions-I I have examined various experimental area dispositions assuming that: -A deep site is used -Assembly on the surface and heavy lifting are used -At least one large detector is installed on a platform and push-pull scheme is used

56. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-435256 Conclusions-II Two large shafts positioned directly above the underground hall (RDR) are not the preferred solution -If two large shafts are used it seems better to position them diagonally wrt IP, outside the footprint of the underground hall -Stairs, lift and services can be installed in these large offset shafts -To have one large shaft only is possible, but it is a disadvantage for the ‘smaller’ experiment

57. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-435257 Conclusions-III The length of the underground hall could be around 90 m for the two-large-offset-shaft solution -The width depends of the way the pacman region is designed and which crane coverage is acceptable -These parameters, like the best disposition of the experimental area, are ‘detector dependent’.

58. A. Hervé - 17 Sept. 2007 ILC-IRENG07-0917-435258 Conclusions-IV In all cases, a pressurized tunnel can connect airlocks at bottom of stairs/lifts and go around the underground hall, providing as many safety egresses from the hall as required by codes -The platform can move on rollers as it has to go in one direction only (see John Amman’s talk) -The preferred solution for moving the detector elements is the use of air-pads as complex paths are likely to be required -These air pads can be used in the ‘sublifting’ mode for maintenance operations (see Hubert Gerwig’s talk)