deformations and movements of cern installations mark jones m. jones, 28/10/2015 fcc infrastructure...
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Deformations and Movements of CERN installationsMark Jones
M. Jones, 28/10/2015 FCC Infrastructure and Operation Meeting
Outline• Introduction• Geologigical Effects on Accelerator
Installations• Civil Engineering Effects on CERN
Installations• Summary
M. Jones, 28/10/2015FCC Infrastructure and Operation
Meeting
FCC Infrastructure and Operation Meeting
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
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
Geological Effects• Accelerator Installations
• LEP / LHC• SPS Complex• PS Complex
• Experiment Installations• ATLAS• CMS
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LEP / LHC Tunnel
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FCC Infrastructure and Operation Meeting
LEP Vertical Offsets
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-0.024
-0.022
-0.02
-0.018
-0.016
-0.014
-0.012
-0.01
-0.008
-0.006
-0.004
-0.002
0
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Ve
rtic
al O
ffse
ts
( m
)
Accumulated Distance ( m )
Restored Vertical Offsets of LEP
Dec-92
Dec-93
Dec-94
Dec-95
Dec-96
Dec-97
Dec-98
P1
P2
P3
P4
P5P6
P7 P8
JURA
Gompholite
Highest Point
Lowest Point
CLIC MODULE WORKING GROUP
GROUND MOTION STUDIES
How to prevent or, at least, anticipate it ?
28 January 20089
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)
CLIC MODULE WORKING GROUP
GROUND MOTION STUDIES
Geological cuts…
28 January 200810
CLIC MODULE WORKING GROUP
GROUND MOTION STUDIES
Then…
28 January 200811
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)
FCC Infrastructure and Operation Meeting
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
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SPS Complex• TT10• TT20
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TT10
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TT20
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RN2016
-5.00
0.00
5.00
10.00
15.00
20.00
25.00R
N20
33
RN
2032
RN
2031
RN
2030
RN
2029
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2028
RN
2027
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2026
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2025
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2024
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2023
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2022
RN
2021
RN
2020
RN
2019
RN
2018
RN
2017
RN
2016
RN
2015
RN
2014
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2013
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2012
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2011
RN
2010
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2009
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2008
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2007
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2006
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2101
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Diff
éren
ces
d'al
titud
es p
ar ra
ppor
t à 1
989
(mm
)Contrôle altimétrique des points sols du TT20 (janvier - février 2008)
Variations par années par rapport à 198924/01/1990
14/01/1991
14/03/1994
12/01/1995
17/01/1997
11/02/1999
25/01/2000
22/01/2001
10/01/2002
13/12/2002
15/12/2003
07/01/2005
14/12/2005
14/12/2006
14/02/2008
FCC Infrastructure and Operation Meeting
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
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PS Complex
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LINAC 4• Civil Engineering predicted movements of
up to 5 mm in the first few years
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LINAC4 - JF. FUCHS (EN-MEF-SU) 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) 20
2012 – 2015 : GGPSO, CROH 2015 [m] H 2012 [m] DH [mm] DH / year [mm]
CRO.55. 433.1706 433.1705 0.13 0.0GGPSO.50. 432.4616 432.4612 0.31 0.1
GGPSO.45. 429.9723 429.9717 0.66 0.2
GGPSO.96. 429.9593 429.9573 2.01 0.7GGPSO.54. 429.9486 429.9474 1.18 0.4GGPSO.11. 429.9890 429.9868 2.19 0.7
+2.19
+1.18
+2.01
+0.66
+0.31
FCC Infrastructure and Operation Meeting
LINAC 4• Tunnel network measurements
• Deformation between Linac tunnel and transfer line
• Elements re-aligned 2015
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PS Complex References• LINAC4 : H network (2012 – 2015)
• J.-F. Fuchs, 2015 (presentation)
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Experiment Installations
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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
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ATLAS
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16 Feb 2011D Mergelkuhl BE/ABP/SU EDMS:
113052126
20 Points onthe Floor
8 Points on theBedplate HLS
A side C sideTCUSA (HLS)
TAUSA(HLS)
C17-14 (Floor)A17-14 ( Floor)
ATLAS – stability points
Deep Reference L
Tunnel LevellingLink with cavern floor /HLS
Deep Reference R
FCC Infrastructure and Operation Meeting
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)
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16 Feb 2011D Mergelkuhl BE/ABP/SU EDMS:
113052128
-0.32mm on BAUSA /change of BAUSA due to maintenance
Result of ATLAS bedplate HLS
Precision 0.03 mm/1 sigma
FCC Infrastructure and Operation Meeting
ATLAS – floor stability
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FCC Infrastructure and Operation Meeting
ATLAS References
M. Jones, 28/10/2015
• Long Term Floor Movement Measurements in LHC Experiments • D. Mergelkuhl• EDMS: 1130521
• ATLAS UX15 Floor Stability• V. Batusov, N. Azaryan, D. Mergelkuhl• EDMS: 1470486
FCC Infrastructure and Operation Meeting
CMS
M. Jones, 28/10/2015
16 Feb 2011D Mergelkuhl BE/ABP/SU EDMS:
113052132
Reference: deep references
CMS – floor stability (leveling)
FCC Infrastructure and Operation Meeting
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
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ACCURACY OF THE RESULTS : +/- 0.05mm
CMS – floor stability at deep references
NO SIGNIFICANT MOVEMENT OF THE CMS CAVERN AT THE DEEP REFERENCES PLACE
FCC Infrastructure and Operation Meeting
CMS – floor stability
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FCC Infrastructure and Operation Meeting
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)
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FCC Infrastructure and Operation Meeting
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
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FCC Infrastructure and Operation Meeting
Civil Engineering Effects• LEP / LHC
• IP1 / ATLAS
• SPS Complex• SPS Ring – Sextant 6
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FCC Infrastructure and Operation Meeting
LEP / LHC• IP1
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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
60 m
120 m
IP 1
150 N
Courtesy of JPQ, IWAA 99
LEP: monitoring during LHC CE works
• Mvt in pt1 during six months in V
Courtesy of JPQ, Iwaa 99
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
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SPS Complex• SPS Ring
• Sextant 6
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The SPS sextant 6
The SPS sextant 6
The SPS sextant 6
The SPS sextant 6
The SPS sextant 6
• 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 2nd one
FCC Infrastructure and Operation Meeting
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)
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FCC Infrastructure and Operation Meeting
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
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FCC Infrastructure and Operation Meeting
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?
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FCC Infrastructure and Operation MeetingM. Jones, 28/10/2015
FCC Infrastructure and Operation MeetingM. Jones, 28/10/2015
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Deformations of the LEP tunnel
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Deformed Areas of LEP Table 25
Name Accumulated Dist. Number of MQ Inclination
(significant) Deformation (significant) Tilt Geology
From To From To
S1-A1-D1 1152.09 1587.73 186500 197500 93,98 93,98
S2-A1-D1 4997.98 6184.12 301500 331500 92-98 92-98 G & C & F
S45-A1-D3 11623.20 15075.17 499500 602500 93-98 92-98 PI 2 Al
S5-A2-D2 16306.28 16561.31 634500 644500 93-96,98 93-96,98
S6-A1-D2 17497.91 17736.05 679500 685500 93,94,96,98 93,94,96,98 PI 1 Al
S7-A1-D1 21027.74 22648.38 783500 825500 92-98 92-98 Al & Fr
S8-A1-D2 23965.13 24321.77 874500 883500 92-98 92-98 98PI
S81-A1-D3 25742.63 599.09 120500 172500 92-98 92/98 PI 3 Al
Si-Aj-Dk: S---Section i---Number of Section (I=1,2,…,8); A---Deformed Area j---Number of deformed Area in the Section I; D---Deformation Pattern k---k th Deformation Pattern ; PI: plus increase of tilts; G: Gompholite; C: Calcaire; F: Geological Fault; Fr: Fracture à morphologie plus ou moins bien marquée repérée sur la Carte Tectonique du Genevois de C. Ruchat (1977); Al: Alignement sur ou supposé relevé sur les images des satellites Landsat 5 (proche infrarouge) , Spot 1 (visibale ) et Seasat 1 (radar).