detector movement system and experimental area layout for a linear collider (16 february 2011 )

16 Feb 2011 D Mergelkuhl BE/ABP/SU EDMS: 1130521 1

Detector movement system and experimental area layout for a Linear Collider (16 February 2011 )

Long Term Floor Movement Measurements in LHC Experiments

Dirk MERGELKUHL BE/ABP/SU


Table of content

• civil engineering prediction for ATLAS cavern

• measurement layouts for ATLAS floor and HLS bedplates

• measurement result for ATLAS HLS Bedplates

• measurement result for ATLAS floor stability

• conclusions for ATLAS

• measurement layout for CMS floor and HLS on YB0

• measurement result CMS floor and HLS

• conclusions for CMS


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 (EMDS: 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)– In the order of 1 mm uplift per year thereafter


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


Movements seen by Bedplate HLS in 2010

Precision 0.03 mm/1 sigma


-0.32mm on BAUSA /change of BAUSA due to maintenance

Result of ATLAS bedplate HLS



ATLAS Floor Stability Aug 03 – Dec 10

• 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

FLOOR STABILITY : CUMULATIVE MOVEMENTS AUGUST 03 - DEC 10

-0.5

0

0.5

1

1.5

2

10

-De

c

Ju

n-0

9

De

c. 0

8

Ju

ly 0

8

Fe

br

08

Au

g 0

7

Ma

rch

07

Au

g 0

6

Ma

rch

06

No

v-0

5

Oc

t 0

5

Au

g 0

5

Ma

rch

05

Oc

t-0

4

Se

p-0

4

Ju

ne

04

Ma

rch

04

Au

g 0

3

MO

VE

ME

NT

S IN

MM

A23+10

A23+5

A23-7

A22-15

A17+8

A17-14

A11+5

A11-5

B0+8

B0+5

B0-5

B0-9

C23+10

C23+5

C23-7

C22-15

C17+8

C17-14

C12-5

C12+5

Prepered by Dirk & Vitali / Jan 2011


USA

US

A

US

A

C

M

US

BED

HLS – EBB INSTALLATION

200 µm temporary deformation

500 µm permanent, immediate deformation


Floor stability (optical levelling):

Measurements linked to the Deep Reference Points 18 epochs March 03 – December 10 (from delivery of new UX15 cavern) movement up to 1.8 mm in ~7.5 years (not linear)

Bedplates (HLS system):

Stable short term – (20 microns / 1 month) – Constant temperature in 2010 Long term movements ~0.6 mm / 3 year => 200 micron/yearSystem in very good running from Sept 2009 (last modif) The system is measuring continuously and is controlled periodically (filling/purging tests) Access ATLAS OP see EXT/HLS_Survey

https://atlasop.cern.ch/atlas-point1/dcs/status_pages.html

Bedplates and Floor vertical stability detailed Survey reports in:https://edms.cern.ch/nav/CERN-0000003491/ATF-0000000084https://edms.cern.ch/nav/CERN-0000003491/ATF-0000000170

Conclusion ATLAS floor/bedplate stability

https://atlasop.cern.ch/atlas-point1/dcs/status_pages.html

https://edms.cern.ch/nav/CERN-0000003491/ATF-0000000084

https://edms.cern.ch/nav/CERN-0000003491/ATF-0000000170


YB0-REF

Z CMS

Water line of Low-Betas

YB0-FZM

v

YB0-NZP

YB0-FZP

X CMS

GISB.UX551L.HLS_LO

GISB.UX551R.HLS_HI

YB0-REF

YB0-FZMYB0-NZP

YB0-FZP

GISB.UX551L.HLS_LO

GISB.UX551R.HLS_HI

CMS – HLS system layout

• 1x HLS on YB0 at beam level linked to low-beta alignment system

• 3x HLS on YB0 feet as a “bi-directional inclinometer”


CMS YB0: ALL HLS-Variation of difference in Height readings (shifted to 0.0 at start) w.r.t. reference HLS (UX551L.HLS_LO)

[From: 01.01.2010 To: 31.12.2010]

-0.400

-0.300

-0.200

-0.100

0.000

0.100

0.200

0.300

0.400

13/1

2/20

09 0

0:00

:00

12/0

1/20

10 0

8:00

:00

11/0

2/20

10 1

6:00

:00

14/0

3/20

10 0

0:00

:00

13/0

4/20

10 0

8:00

:00

13/0

5/20

10 1

6:00

:00

13/0

6/20

10 0

0:00

:00

13/0

7/20

10 0

8:00

:00

12/0

8/20

10 1

6:00

:00

12/0

9/20

10 0

0:00

:00

12/1

0/20

10 0

8:00

:00

11/1

1/20

10 1

6:00

:00

12/1

2/20

10 0

0:00

:00

11/0

1/20

11 0

8:00

:00

10/0

2/20

11 1

6:00

:00

Date & Time (UTC)

Dif

f.H

t.=

(Ri-

Rir

ef)

-(R

0-R

0re

f)(m

m)

-4

-3

-2

-1

0

1

2

3

4

TESL

A

Ref HLS: UX551L.HLS_LO

Diff.Ht_(UX551R.HLS_HI - UX551L.HLS_LO)i - (UX551R.HLS_HI - UX551L.HLS_LO)0

Diff.Ht_(YB0FREF.HLS_LO - UX551L.HLS_LO)i - (YB0FREF.HLS_LO - UX551L.HLS_LO)0

Mag Field

Note: | Time scaling: 1 Day-Average | User_Name: | Date: 28-janv-2011

Movements seen by CMS YB0 HLS in 2010

• Correlation to magnetic field visible at beam level• Sag of ~120 micron/year



Movements seen by CMS YB0 HLS 2008-2010

02.2008 11.2010

Results in agreement with floor leveling…

• Precision 0.03mm/1 sigma • Sag of 1.0 mm in 2.5 years at beam level

1 m

m


Stability HLS: relative monitoring YB0 feet

0.00

1.00

Permanent reading, punctual analysis

02.2008 11.2010

No inclination in 2010



ACCURACY OF THE RESULTS : +/- 0.05mm

CMS – floor stability at deep references

01.2008 02.2010

Only local floor stability!!!

EDMS: CMS-I-UR-0207


Punctual survey campaigns: Mar 2007, Jan 2008, Mar 2009, Feb 2011

M0 and P0 moved down by 1.4 mm max.

Reference: deep references

CMS – floor stability (leveling)


CMS - FLOOR POINTS FAR SIDE

-1.5

-1.0

-0.5

0.0

0.5

ML2 ML1 M0 MR1 MR2

[mm

]

JAN 2008 - MARCH 2007MARCH 2009 - MARCH 2007FEB 2011 - MARCH 2007

CMS - FLOOR POINTS NEAR SIDE

-1.5

-1.0

-0.5

0.0

0.5

PL2 PL1 P0 PR1 PR2[m

m]

JAN 2008 - MARCH 2007MARCH 2009 - MARCH 2007FEB 2011 - MARCH 2007

CMS – floor stability (results)Summary of CMS floor stability by optical leveling (Mar 2007 - Feb 2011)

JAN 2008 - MARCH 2007 MARCH 2009 - MARCH 2007 FEB 2011 - MARCH 2007

NAME DZ [mm] DZ [mm] DZ [mm]

ML2 --- --- ---ML1 -0.8 -0.7 -1.0M0 -0.4 -0.9 -1.4

MR1 -0.1 -0.4 -0.8MR2 0.4 0.2 0.1PL2 --- --- ---PL1 -0.7 -0.6 -0.9P0 -0.6 -0.9 -1.4

PR1 -0.2 -0.3 -0.7PR2 0.4 0.2 0.0



Conclusion CMS stability Floor stability:

Deep references in UX55 stable to “very local” vicinity Measurements linked to the Deep Reference Points in UX55 4 epochs March 07 – February 11 movement up to -1.4 mm in ~4 years around YB0

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)

HLS system on YB0 beam line level:

Long term movements -120 micron/year in 2010 on beam line level Major influence by temperature changes in UX55 (in ~9 m height) Correlation to magnetic field strength (deformation of YB0) The system is measuring continuously and is controlled periodically (filling/purging tests)


Movements seen by CMS YB0 HLS in 2010and YB0 HLS temperature changes

detector movement system and experimental area layout for a linear collider (16 february 2011 )

Documents

cmsd mergelkuhl beabpsu

floor concretingup

atlas cavern emds

atlas measurement layout

points onthe floor

lhc tunnel close

bausa change of bausa

dirk vitali