2. Deformations and Movements of CERN installations Mark Jones M. Jones, 28/10/2015 FCC Infrastructure and Operation Meeting

3. Outline Introduction Geologigical Effects on Accelerator Installations Civil Engineering Effects on CERN Installations Summary M. Jones, 28/10/2015 FCC Infrastructure and Operation Meeting

4. Introduction Presentation assimilated from previous reports and studies LEP / LHC Complex SPS Complex PS LHC Experiments Survey reference point measurements Geodetic reference networks Machine and experiment elements In the SURVEY database since 1980s M. Jones, 28/10/2015 FCC Infrastructure and Operation Meeting

5. Introduction Analyses Movements between survey measurement campaigns Some deformation analysis Complicated by re-alignments for the accelerators Supports between accelerator elements and tunnel floor can be source of movements Points not directly on the ground Relative differences Some deep reference points for vertical control Some doubts regarding their stability M. Jones, 28/10/2015 FCC Infrastructure and Operation Meeting

6. Geological Effects Accelerator Installations LEP / LHC SPS Complex PS Complex Experiment Installations ATLAS CMS M. Jones, 28/10/2015 FCC Infrastructure and Operation Meeting

7. LEP / LHC Tunnel M. Jones, 28/10/2015 FCC Infrastructure and Operation Meeting

8. LEP Vertical Offsets M. Jones, 28/10/2015 FCC Infrastructure and Operation Meeting

9. CLIC MODULE WORKING GROUP GROUND MOTION STUDIES How to prevent or, at least, anticipate it ? 28 January 2008 9 In LEP area, there are 3 main geological anomalies : The Allondon “Sillon”, The Sergy “Sillon”, The Montfleury “Sillon”. The first one had been taken into account. But the 2 others were not expected… (Ref 2)

10. CLIC MODULE WORKING GROUP GROUND MOTION STUDIES Geological cuts… 28 January 2008 10

11. CLIC MODULE WORKING GROUP GROUND MOTION STUDIES Then… 28 January 2008 11 Allondon Sergy Montfleury Nominal zero : 17mm in point 1 It’s nearly impossible to have a perfectly stable place. Solutions exist (good tunnel floor engineering, good drainage, etc.) but the main is to know the high risk places… (Ref 2)

12. LEP / LHC References Deformation and Movement Analysis of LEP JIN F., 10.1999, Post-doctoral Thesis, CERN Ground Motion Studies T. Touze, 28.01.2008, CLIC Module WG M. Jones, 28/10/2015 FCC Infrastructure and Operation Meeting

13. SPS Complex TT10 TT20 M. Jones, 28/10/2015 FCC Infrastructure and Operation Meeting

14. TT10 M. Jones, 28/10/2015 FCC Infrastructure and Operation Meeting

15. TT20 M. Jones, 28/10/2015 FCC Infrastructure and Operation Meeting

16. SPS Complex References SPS Ring Stabilite Verticale des Tunnels du SPS J.-P. Quesnel, 29.04.1988, LEP/SU/Int. 890s Controle Stabilite TT10 (Decembre 2007) C. Podevin, 10.12.2007, EDMS: 882731 Controle de Stabilite du TT20 – Nivellement des points sol C. Podevin, 19.03.2008, EDMS: 885727 M. Jones, 28/10/2015 FCC Infrastructure and Operation Meeting

17. PS Complex M. Jones, 28/10/2015 FCC Infrastructure and Operation Meeting

18. LINAC 4 Civil Engineering predicted movements of up to 5 mm in the first few years M. Jones, 28/10/2015 FCC Infrastructure and Operation Meeting

19. LINAC4 : SU Network 7 GGPSO (2010, 2015), 2 CRO (2010) 5 pillars (2012-2013) ~ 40 reference points (2015) LINAC4 - JF. FUCHS (EN-MEF-SU)19

20. 2012 – 2015 : GGPSO, CRO +2.19 +1.18 +2.01 +0.66 +0.31 LINAC4 - JF. FUCHS (EN-MEF-SU)20

21. LINAC 4 Tunnel network measurements Deformation between Linac tunnel and transfer line Elements re-aligned 2015 M. Jones, 28/10/2015 FCC Infrastructure and Operation Meeting

22. PS Complex References LINAC4 : H network (2012 – 2015) J.-F. Fuchs, 2015 (presentation) M. Jones, 28/10/2015 FCC Infrastructure and Operation Meeting

23. Experiment Installations M. Jones, 28/10/2015 FCC Infrastructure and Operation Meeting

24. Expected Cavern Movements No predictions known by SU for the ALICE, LHCb and CMS caverns For LHC, civil engineering predicted that some cavern movements could be expected during/after construction. Predictions for ATLAS Cavern (EDMS: ATC- T-ER-0004) Up to 2 mm settlement after floor concreting Up to 5.5 mm settlement predicted after ATLAS in place (during first 6 months) Of the order of 1 mm uplift per year thereafter M. Jones, 28/10/2015 FCC Infrastructure and Operation Meeting

25. ATLAS M. Jones, 28/10/2015 FCC Infrastructure and Operation Meeting

26. 16 Feb 2011 D Mergelkuhl BE/ABP/SU EDMS: 1130521 26 20 Points on the Floor 8 Points on the Bedplate HLS A side C side TCUSA (HLS) TAUSA (HLS) C17-14 (Floor)A17-14 (Floor) ATLAS – stability points Deep Reference L Tunnel Levelling Link with cavern floor /HLS Deep Reference R

27. ATLAS – floor stability Reference are deep references in LHC tunnel close to IP1 Time between measurements varies from 3 to 18 month Precision for single epoch 0.2 mm/1 sigma; 0.3 mm between 2 epochs Distance between lateral walls -15 mm/8 years (2003 – 2010) M. Jones, 28/10/2015 FCC Infrastructure and Operation Meeting

28. 16 Feb 2011 D Mergelkuhl BE/ABP/SU EDMS: 1130521 28 -0.32mm on BAUSA /change of BAUSA due to maintenance Result of ATLAS bedplate HLS Precision 0.03 mm/1 sigma

29. ATLAS – floor stability M. Jones, 28/10/2015 FCC Infrastructure and Operation Meeting

30. ATLAS References M. Jones, 28/10/2015 FCC Infrastructure and Operation Meeting Long Term Floor Movement Measurements in LHC Experiments D. Mergelkuhl EDMS: 1130521 ATLAS UX15 Floor Stability V. Batusov, N. Azaryan, D. Mergelkuhl EDMS: 1470486

31. CMS M. Jones, 28/10/2015 FCC Infrastructure and Operation Meeting

32. 16 Feb 2011 D Mergelkuhl BE/ABP/SU EDMS: 1130521 32 Reference: deep references CMS – floor stability (leveling)

33. CMS – floor stability Floor stability Deep references in UX55 stable to “very local” vicinity Measurements linked to the Deep Reference Points in UX55 7 epochs March 07 – March 15 movement up to -1.6 mm in ~8 years around YB0 M. Jones, 28/10/2015 FCC Infrastructure and Operation Meeting

34. ACCURACY OF THE RESULTS : +/- 0.05mm CMS – floor stability at deep references NO SIGNIFICANT MOVEMENT OF THE CMS CAVERN AT THE DEEP REFERENCES PLACE

35. CMS – floor stability M. Jones, 28/10/2015 FCC Infrastructure and Operation Meeting

36. CMS stability Relative HLS system on YB0 feet No inclination visible on feet of YB0 System in very good running from Apr 2008 The system is measuring continuously and is controlled periodically (filling/purging tests) M. Jones, 28/10/2015 FCC Infrastructure and Operation Meeting

37. CMS References Readings carried out on the 5 deep references from September 2006 to March 2015 A. Behrens, A. Maurisset EDMS: 1553745 Long Term Floor Movement Measurements in LHC Experiments D. Mergelkuhl EDMS: 1130521 M. Jones, 28/10/2015 FCC Infrastructure and Operation Meeting

38. Civil Engineering Effects LEP / LHC IP1 / ATLAS SPS Complex SPS Ring – Sextant 6 M. Jones, 28/10/2015 FCC Infrastructure and Operation Meeting

39. LEP / LHC IP1 M. Jones, 28/10/2015 FCC Infrastructure and Operation Meeting

40. LEP: monitoring during LHC CE works In 1998 WPS sensors have been installed in IR1and IR5 Length of wire 120 m 11 sensors installed on quadrupoles magnets or on floor points ??? and two at the extremities where it was considered to be stable. Affected area 60m Courtesy of JPQ, IWAA 99

41. LEP: monitoring during LHC CE works Mvt in pt1 during six months in V Courtesy of JPQ, Iwaa 99

42. LEP: monitoring during LHC CE works Since Aug 2000, the sensors indicates mvt in PT1 in V bigger than 4 mm A standard measurement was done and a realignment Very small mvt in R ~0.6-0.7mm

43. SPS Complex SPS Ring Sextant 6 M. Jones, 28/10/2015 FCC Infrastructure and Operation Meeting

44. The SPS sextant 6

48. Almost 3-4 mm every 10 years, about 15 mm in total ! The movements were : At the beginning more important on the first Xing pt Then on the 2 nd one

49. LEP / LHC & SPS References SPS Ring Stabilite Verticale des Tunnels du SPS J.-P. Quesnel, 29.04.1988, LEP/SU/Int. 890s Ground Movements in CERN Underground Facilities D. Missiaen, 2010 (presentation) LEP / LHC Ground Movements in CERN Underground Facilities D. Missiaen, 2010 (presentation) M. Jones, 28/10/2015 FCC Infrastructure and Operation Meeting

50. Summary Significant ground movements in a few accelerator zones Geological – LHC S78 Civil Engineering – SPS Sextant 6 Regular measurements carried out TI8 unstable – no long term analysis M. Jones, 28/10/2015 FCC Infrastructure and Operation Meeting

51. Observations Need good geological data to identify other correlations – GIS, CE? CE systems Extensometers in LHC Experiment Halls Ground water table sensor at Pt 4 What data is available, are they still working? What information do you need? M. Jones, 28/10/2015 FCC Infrastructure and Operation Meeting

53. M. Jones, 28/10/2015 FCC Infrastructure and Operation Meeting

54. M. Jones, 28/10/2015 FCC Infrastructure and Operation Meeting

55. Deformations of the LEP tunnel M. Jones, 28/10/2015 FCC Infrastructure and Operation Meeting