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Experimental cavern movements 2 nd HL-LHC PLC meeting 25.09.2012

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.

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Experimental cavern movements 2 nd HL-LHC PLC meeting 25.09.2012

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  1. Experimental cavern movements 2nd HL-LHC PLC meeting 25.09.2012 A. Behrens, J.-C. Gayde, D. Mergelkuhl BE/ABP/SU-EM

  2. CMS Stability: Deep references and cavern floor points Reference: 5 deep references 10 Floor points L54 side R56 side ML2 ML1 MR2 M0 MR1 Xsu CMS detector PL2 PL1 PR2 P0 PR1 Ysu A. Behrens BE/ABP/SU-EM

  3. CMS Stability: Cavern floor leveling FLOOR POINTS FAR SIDE JAN 2008 Total load 14600t L54 Side R56 Side No significant movement downwards of floor points during last year! FLOOR POINTS NEAR SIDE A. Behrens BE/ABP/SU-EM

  4. ATLAS Stability – HLS points on bedplates TAUSA TCUSA USA side Reference: 2 HLS points A side C side BMUSA BCUSA BAUSA Bedplate Trench A Trench C Bedplate BAUS BCUS BMUS 6 HLS points on the Bedplates US side A. Behrens BE/ABP/SU-EM

  5. ATLAS Stability – HLS system Max. movement upwards of 0.6mm during last 2 years! VARIATION OF DIFFERENCES IN HEIGHT OF HLS SENSORS FROM 20 NOV 2009 TO 21 AUG 2012 TS 2011-12 TS 2010-11 0.5 mm Values normalized to TCUSA sensor Shock on TAUSA sensor A. Behrens BE/ABP/SU-EM

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