experimental cavern movements 2 nd hl-lhc plc meeting 25.09.2012
DESCRIPTION
Experimental cavern movements 2 nd HL-LHC PLC meeting 25.09.2012 A. Behrens , J.-C. Gayde , D. Mergelkuhl BE/ABP/SU-EM. CMS Stability : D eep references and cavern floor points. Reference: 5 deep references. 10 Floor points. L54 side. R56 side. ML2. ML1. MR2. M0. MR1. Xsu. - PowerPoint PPT PresentationTRANSCRIPT
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Experimental cavern movements
2nd HL-LHC PLC meeting25.09.2012
A. Behrens, J.-C. Gayde, D. Mergelkuhl
BE/ABP/SU-EM
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CMS Stability: Deep references and cavern floor points
25.09.2012 A. Behrens BE/ABP/SU-EM 2
Reference: 5 deep references 10 Floor points
ML1ML2 MR1 MR2
PL1PL2 PR1 PR2
L54 side R56 side
M0
P0
Xsu
Ysu
CMS detector
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PL2 PL1 P0 PR1 PR2
-1.5
-1.0
-0.5
0.0
0.5
JAN 2008 - MARCH 2007MARCH 2009 - MARCH 2007FEB 2011 - MARCH 2007FEB 2012 - MARCH 2007
[mm
]
ML2 ML1 M0 MR1 MR2
-1.5
-1.0
-0.5
0.0
0.5
[mm
]
CMS Stability: Cavern floor leveling
25.09.2012 A. Behrens BE/ABP/SU-EM 3
L54 Side R56 Side
FLOOR POINTS FAR SIDE
FLOOR POINTS NEAR SIDE
No significant movementdownwards
of floor points during last year!
JAN 2008Total load 14600t
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Bedplate
Bedplate
09.12.2010 A. Behrens BE/ABP/SU-EM 4
6 HLS points on the Bedplates
A side C side
TCUSATAUSA
ATLAS Stability – HLS points on bedplates
Reference:2 HLS points
USA side
US side
BCUSABMUSA
BAUSA
BAUSBMUS
BCUS
Trench CTrench A
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25.09.2012 A. Behrens BE/ABP/SU-EM 5
VARIATION OF DIFFERENCES IN HEIGHT OF HLS SENSORS
FROM 20 NOV 2009 TO 21 AUG 2012
Shock on TAUSA sensor
TS 2
010-
11
TS 2
011-
12
0.5
mm
Values normalized to TCUSA sensor
Sensor TCUSA
RTCUSA
ATLAS Stability – HLS system
Max. movement upwards of 0.6mm
during last 2 years!