EMU Alignment System Analog Data Analysis for ME+1 y ME+4 Stations Run: Aug 25-28, 2006

EMU Meeting, CERN, Sept 18-19, 2006O.Prokofiev 1

EMU Alignment System

Analog Data Analysisfor ME+1ME+4 Stations

Run: Aug 25-28, 2006Magnetic field up to 4.0 Tesla

Contents:

Z-sensors

R-sensors

Proximity sensors

Biaxial Inclinometers

Temperature sensors

Summary

Endcap Muon Meeting at CERN Sept 18-19, 2006


The EMU Alignment Project task is to determine and monitor the position of CSC relative to each other and to the MAB.

The alignment uncertainty should be comparable to the chamber resolution and it is defined as 75 m for ME1/2 and 150m for the others stations. The temperature must be measured with ±0.1° C precision.

Cable connection

EMU Alignment system


Z-sensors

Scale factor: - Z1 (Keyence LB-70) station ME+1 only: 1.01 +/- 0.1 V/ cm - Z1, Z2 (linear potentiometer) 0.93 +/- 0.01 1/ cm

42 Z-sensors: - 6 Keyence laser sensors - 36 potentiometers

P1 - 15° P2 - 75° P3 - 135° P4 - 195° P5 - 255° P6 - 315°

P1

P2

P3

P6

P5

P4

Z1

Z2

All (12) installed Z1 were broken during the disk closing. Only one Z1 sensor (ME+2, point 5) is probably good

Z1Z1

Z1

YE

+3

YE

+2

YE

+1

Z2

Z2

Z2


Z-1 Sensors: ME+1 Station

6 laser displacement sensors were mounted on theYE+1 disk but only 3 MABs on YB2.

ME+1 Station (Z1 sensors)

y = 0.0307x2 + 0.0309x - 0.0007

y = 0.2806x2 + 0.1414x - 0.0081

y = 0.2646x2 - 0.1985x + 0.0057

0

1

2

3

4

5

6

7

0 1 2 3 4 5Magnetic field, Tesla

Dis

plac

emen

t,

mm

,

Point 2

Point 5

Point 6

Poly.(Point 2)Poly.(Point 5)Poly.(Point 6)

YE+1

MTCC (Aug 26-28)

0.0

1.0

2.0

3.0

4.0

5.0

8/25 8/26 8/27 8/28 8/29

Ma

gn

etic f

ield

, T

esla

ME+1 Station (Z1 laser sensors)

-1

0

1

2

3

4

5

6

7

8/25 8/26 8/27 8/28 8/29

Dis

pla

ce

men

t, c

m

Point 2

Point 5

Point 6

ANSYS calculation (EMU TDR, page C7) shows a distortion in Z-directionof endcap disks (outer edges) for about 6 mm that is in good agreementwith Z1 laser displacement sensor data for upper point 2 but for lower point 5 and 6 the disk bend deformations are less than predicted. No linear dependence verses magnetic field was observed

Z1

P1

P2

P3

P6P5

P4


Proximity Sensors (ME+1 Station)

Pt. 2

Pt. 3

Pt. 4

Pt. 5

Pt. 1

Pt. 6

Proximity sensor

Transfer Plate

X

Y

S6 S5S4

S3S2

S1

S1-S6 Sectors

Px1/1

Px1/2

Px2/1

Px2/2

Px6/1

Px6/2

Px1/1, Px2/1, Px3/1…. 36/1 Outer Ring

Px1/2, Px2/2, Px3/2…. 36/2 Inner Ring

P1 - 15° P2 - 75° P3 - 135° P4 - 195° P5 - 255° P6 - 315°

Scale factor for proximity sensors: 0.918 +/- 0.003 1/ cm

All system contain 72 Proximity sensors

The first sensors Px1/1 and Px1//2 of Sector 1 mounted near edge of the first ME1/3 chamber at - 5 o


-200

0

200

400

600

800

8/25 8/26 8/27 8/28 8/29

Dis

pla

cem

ent,

m

Px1/1

Px1/2

Px2/1

Px2/2

Px3/1

Px3/2

Px4/1

Px4/2

Px5/1

Px5/2

Px6/1

Px6/2

ME+1 Station

Sector #4

-200

0

200

400

600

800

8/25 8/26 8/27 8/28 8/29

Dis

pla

cem

ent,

m

Px1/1

Px1/2

Px2/1

Px2/2

Px3/1

Px3/2

Px4/1

Px4/2

Px5/1

Px5/2

Px6/1

Px6/2

ME+1 Station

Sector #5

-200

0

200

400

600

800

8/25 8/26 8/27 8/28 8/29

Dis

pla

cem

ent,

m

Px1/1

Px1/2

Px2/1

Px2/2

Px3/1

Px3/2

Px4/1

Px4/2

Px5/1

Px5/2

Px6/1

Px6/2

ME+1 Station

Sector #6

0.0

1.0

2.0

3.0

4.0

5.0

8/25 8/26 8/27 8/28 8/29

Mag

netic

fie

ld,

T

Magnet Tests (Aug 26-28, 2006)

Proximity Sensors: ME+1 Station (Sector4-6)

Instability?


Chamber Displacements at 4.0T

The distances between ME1/3 chambers increase with magnetic field and reached up to 700 m at 4.0T. A good correlation between aluminum Z-stoppers and proximity sensor positions was found.

0

200

400

600

800

1000

0 60 120 180 240 300 360f, degree

Dis

pla

ce

men

t, m

Inner Outer Post Position

0

200

400

600

800

0.0 1.0 2.0 3.0 4.0 5.0Magnetic field, T

Dis

plac

emen

t, m

PX2/1

PX2/2

Poly.(PX2/2)Poly.(PX2/1)


Radial Sensors

P1 - 15° P2 - 75° P3 - 135° P4 - 195° P5 - 255° P6 - 315°

P6

P5

P4

P3

P2

P1

X

Y

R3R2

ME1 StationR2R1

ME2,3,4 Stations

42 R-sensors (LPX-50 potentiometers)

Scale factor for R- sensors: 0.180 +/- 0.004 V/ cm


0.0

1.0

2.0

3.0

4.0

5.0

14:00 2:00 14:00 2:00 14:00 2:00 14:00 2:00

Mag

netic

fiel

d, T


R- Sensors: ME+1 Station

ME+1, Point 1

-0.8

-0.6

-0.4

-0.2

0

0.2

14:00 2:00 14:00 2:00 14:00 2:00 14:00 2:00

Rela

tive ,

mm

,

R2 R3

ME+1, Point 2

-0.8

-0.6

-0.4

-0.2

0

0.2

14:00 2:00 14:00 2:00 14:00 2:00 14:00 2:00

Rela

tive ,

mm

,

R2 R3

ME+1, Point 3

-0.8

-0.6

-0.4

-0.2

0

0.2

14:00 2:00 14:00 2:00 14:00 2:00 14:00 2:00

Rela

tive,

mm

,

R2 R3

ME+1, Point 5

-0.8

-0.6

-0.4

-0.2

0

0.2

14:00 2:00 14:00 2:00 14:00 2:00 14:00 2:00

Rela

tive,

mm

,

R2 R3

ME+1, Point 6

-0.8

-0.6

-0.4

-0.2

0

0.2

14:00 2:00 14:00 2:00 14:00 2:00 14:00 2:00

Rela

tive,

mm

,

R2 R3


Distance between chambers verses magnetic field

At magnetic field of 4.0 T: - the largest displacements between chambers (ME+1 station) do not exceed ~ 700 m - chamber displacement relative to transfer plate is less than 300 m

-800

-600

-400

-200

0

0.0 1.0 2.0 3.0 4.0 5.0Magnetic field, T

Dis

plac

emen

t,

m

Point 1

Point 2

Point 3

Point 5

Point 6

ME+1 StationR3 Sensors (between chambers)

-400

-300

-200

-100

0

0.0 1.0 2.0 3.0 4.0 5.0Magnetic field, T

Dis

plac

emen

t,

m

Point 1

Point 2

Point 3

Point 4

Point 5

Point 6

ME+3 Station R1 Sensors (between chambers)

0

50

100

150

200

0.0 1.0 2.0 3.0 4.0 5.0Magnetic field, T

Dis

plac

emen

t,

m

Point 1

Point 2

Point 3

Point 4

Point 5

Point 6

ME+2 StationR1 Sensors (between chambers)

P6P5

P4

P3

P2

P1

X

Y


Inclinometers

Scale factor: 0.246 +/- 0.015 V / Arc degree 14.3 mV / mRad

Inclinometers wedge shimmed to approximately Horizontal

+X rotation around a Z - vector

+Y rotation around an R - vector (pointing out)

P1 - 15° P2 - 75° P3 - 135° P4 - 195° P5 - 255° P6 - 315°

P1

P2

P3

P6

P5

P4

Z

When the rotation is less than about 4 degrees, the direction and magnitude of the resultant tilt is quickly obtained from the vector sum of the X and Y tilt measurements.

Y-tilt verses transfer plate position

0.71

-0.26

-0.71-0.96

0.26

0.96

-1.5

-1.0

-0.5

0.0

0.5

1.0

1.5

0 45 90 135 180 225 270 315 360

Transfer plate angle position, degrees

Tilt

, rel

ativ

e

Inclinometer 2

Inclinometer 1

Y

X


ME+1, Point 1

-5

-4

-3

-2

-1

0

1

2

3

4

5

14:00 2:00 14:00 2:00 14:00 2:00 14:00 2:00

An

gle

, m

Ra

d

Incl 1X Incl 1Y

Incl 2X Incl 2Y

ME+1, Point 2

-5

-4

-3

-2

-1

0

1

2

3

4

5

14:00 2:00 14:00 2:00 14:00 2:00 14:00 2:00

An

gle

, m

Ra

d

Incl 1X Incl 1Y

Incl 2X Incl 2Y

ME+1, Point 3

-5

-4

-3

-2

-1

0

1

2

3

4

5

14:00 2:00 14:00 2:00 14:00 2:00 14:00 2:00

An

gle

, m

Ra

d

Incl 1X Incl 1Y

Incl 2X Incl 2Y

0.0

1.0

2.0

3.0

4.0

5.0

14:00 2:00 14:00 2:00 14:00 2:00 14:00 2:00

Mag

netic

fiel

d, T


Inclinometers: ME+1 (Points 1-3)


Inclinometers Results

-3

-2

-1

0

1

2

3

4

5

0 1 2 3 4 5 6 7Point #

Tilt

an

gle

, mra

d

Incl-1Y

Incl-2Y

ME+1 StationTilt angle measurements at 4.0T

?

The tilt angle for ME+1 station at Point 2 Is very large (~ 4 mrad).

Tilts for point 2 and 5 should be equal but have opposite signs?Need to check inclinometer mounting on the disks

-3

-2

-1

0

1

2

3

0 1 2 3 4 5 6 7Point #

Tilt

an

gle

, m

rad

Station +1

Station +2

Station +3

Station +4

Tilt angle measurements for ME+1 y ME+4 stations Magnetic field = 4.0T

P6P5

P4

P3

P2

P1

X

Y

Disk Deformation


Temperature Measurements

P1 - 15° P2 - 75° P3 - 135° P4 - 195° P5 - 255° P6 - 315°

P1

P2

P3

P6

P5

P4

T1

T2

T3

Slope factor: T sensors: 1 degree K / 10 mV

72 thermocouple T-sensors (AD692)

• All installed temperature sensors are working and have reasonable data.

• Temperature variations are similar to day/night ambient temperature and do not exceed 2-3 degrees C.

• No difference in T1, T2 and T3 data for upper points (1-4)

• For lower points 5 and 6 (slice test chambers) there is a temperature variation between sensors of 2-3 degrees C and corresponds to a temperature distribution between the disk and the working chambers.


ME+1 Station: Temperature Variations

0.0

1.0

2.0

3.0

4.0

5.0

8/25 8/26 8/27 8/28 8/29

Mag

netic

fiel

d, T

Magnet Tests (Aug 26-28, 2006

15

17

19

21

23

25

8/25 8/25 8/26 8/26 8/27 8/27 8/28 8/28 8/29

Tem

pera

ture

, C T1

T2

T3

ME+1 Point 1

15

17

19

21

23

25

8/25 8/25 8/26 8/26 8/27 8/27 8/28 8/28 8/29

Tem

pera

ture

, C T1

T2

T3

ME+1 Point 2

15

17

19

21

23

25

8/25 8/25 8/26 8/26 8/27 8/27 8/28 8/28 8/29

Tem

pera

ture

, C

T1T2T3

ME+1 Point 3

15

17

19

21

23

25

8/25 8/25 8/26 8/26 8/27 8/27 8/28 8/28 8/29

Tem

pera

ture

, C T1

T2T3

ME+1 Point 4

13

15

17

19

21

23

8/25 8/25 8/26 8/26 8/27 8/27 8/28 8/28 8/29

Tem

pera

ture

, C

T1

T2T3

ME+1 Point 5

15

17

19

21

23

25

8/25 8/25 8/26 8/26 8/27 8/27 8/28 8/28 8/29

Tem

pera

ture

, C

T1T2T3

ME+1 Point 6


15

17

19

21

23

25

8/25 8/26 8/27 8/28 8/29

Tem

pera

ture

, C T1

T2T3

ME+1 Point 6

3.5

3.7

3.9

4.1

8/25 8/26 8/27 8/28 8/29

Mag

netic

fie

ld,

T Magnet Tests (Aug 26-28, 2006)

-200

0

200

400

600

800

8/25 8/26 8/27 8/28 8/29

Dis

pla

cem

ent,

m

Px1/1

Px1/2

Px2/1

Px2/2

Px3/1

Px3/2

Px4/1

Px4/2

Px5/1

Px5/2

Px6/1

Px6/2

ME+1 Station

Sector #6

y = -0.0357x + 1.061

y = -0.0333x + 0.9381

0.3

0.3

0.4

0.4

0.4

17 17.5 18 18.5 19 19.5 20

Temperature, C

Dis

plac

emen

t,

m Px 3/1

Px 3/2

Linear(Px 3/1)Linear(Px 3/2)

Station 1, Point 6T2 sensor

Correlation proximity data with temperature

- 35 m / oC

PX sensors: Temperature Correlation

ME1/3 chamber position drift is about~35 m / oC


Summary

The measured displacement of YE+1 disk in Z direction is about 6 mm for point 2 and agreed with ANSYS calculations. Displacements for point 5 and 6 are lees for 2-3 mm. Non linear dependence displacement verses magnetic field was observed.

The distance between ME1/3 chambers (no overlapping) measured by proximity sensors is increased with field up to 700 m at 4.0 T. ME1/3 chamber position drift at 4.0 T verses of temperature is about of 35 m/ o C. The R displacement between ME1/2 and ME1/3 chambers at 4.0T is about 600 m and less than 300 m for ME+2, 3 and 4 stations. The chamber displacements relative to transfer plates are small and do not exceed 100 -150 m at 4.0 T for all stations.

The inclinometer data show that tilt angle for station ME+1 measured for the ME1/2 chamber at Point 2 is about 4 mrad. This data need to compare with HSLM DCOPS data. For all inclinometers mounted on the transfer plates data are similar for all stations. Tilt angle for points 2 and 5 have the equal value but have to be opposite signs. Need to check inclinometer mounting position on the transfer plates.

All temperature sensors present similar results. A temperature variation is correlated with ambient day/night temperature and do not exceed of 2-3 Co.

Analog alignment system demonstrated a good performance and met technical specs

EMU Alignment System Analog Data Analysis for ME+1 y ME+4 Stations Run: Aug 25-28, 2006

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