1

Photogrammetry of TT7

2

Front view Distribution of all targets

All the plots are in the magnet reference system

3

Top view Distribution of all targets

Magnet

TT7, zoom in nextpage

4

Yellow plate

2.6 mmYellow plate

Endcaps Surface

Endcaps holes

Endcaps holes

Endcaps Surface

2 mm

Planarity of yellow plate and top endcaps improved with respect to TT10

5

HSB

VSB

Top EC

Bottom EC

Yellow plate

L EC R ECTop view ZOOM

6

General side view

VSB

HSB

Bottom EC Top EC

Yellow plateRigth EC

Left EC

7

Endcaps andCroisillionsTop View

Croisillions

R EC

L EC

Top EC

Bottom EC

8

Endcaps andCroisillionsSide View

Bottom EC

Top EC

Croisillions

Rigth EC

Left EC

10 mm

9

1

2

3

4

5

6

7

8

9

10

11

12

The points just at the borders of the horizontal end-caps (green boxes) have been included and corrected by 3 mm along the beam coordinate to take into account the thickness of the end-cap

Definition of the horizontal slices, front viewTop

Bottom

Y

Left RigthX

10

Slice 1 (very top)

2

3

4

Y vs X

Y vs X

Y vs X

Y vs X

Z vs X

Z vs X

Z vs X

Z vs X

Magnet

BorexinoBottom

Top

This line is just put to guide the eyes

Front view of the slices Top view of the slices

Punching effect of thecroisillions

11

5

6

7

8

Z vs X

Z vs X

Z vs X

Z vs XY vs X

Y vs X

Y vs X

Y vs X

12

9

10

11

Slice 12Very bottom

Y vs X

Y vs X

Y vs X

Y vs X

Z vs X

Z vs X

Z vs X

Z vs X

13

Left Rigth

Bottom

TopMagnet

Borexino

X

YZ

Point of maximal deformation at the center, where there is the max of the bending both along the short and the long side. These points are corresponding to the red bands in the table of the previous slides

Bending along the long side

Bending along the short side

Typical deformation of one horizontal module

NB: the axis system is left handed, this comes from the fact that is just a redefinition of the one from the photogrammetry which is rigth-handed but with different axis naming

X(photo) -> XY(photo) -> ZZ(photo) -> Y

14

-975

-980

-985

-990

-995

Surface representation of the measured points, system corrected for the non verticality of the magnet

Max spread in the beamCoordinate of the measured points, 20.4 mm

15

Top Bottom

Rock

Gallery

Rock

Bottom

Top

Gallery Gallery Rock

Top

Bottom

Bottom Top

GalleryRock

1

1

2

2

3

3

16

Rock Gallery

Top

Bottom

3

Bottom

Top

GalleryRock3

Top

Bottom

Top

Bottom

TT7

TT10

TT7 has non planarity effects different than TT10

17

Wall volume

18

Conclusions on TT7:

1) Yellow plate flatness and alignment of top EC improved with respect to TT10

2) Non planarity effects at the level (or slightly worse than TT10) with a different shape

19

X

Y

Z

Magnet

Borexino

GalleryRock

Top

Bottom

Definition of the « rails » reference system for theTDA5005

20

Wires NO Wires

Turnbuckles Turnbuckles

TurnbucklesTurnbuckles

Yellow plateYellow plate

Yellow plateYellow plate

The yellow plate with the wires had a sagitta of about 12 mm. By removing the wires this sagitta increased by 3 mm and the gallery side of the yellow plate moved by 4 mm towards Borexino

The points measured on the turnbuckles practically did not move

+3 mm

+4 mm

Gallery Rock

Nominal positionOf the yellow plate surface in the Target z=3891.8

21

Wires Wires

z z

Turnbuckles

Turnbuckles (very small movements)

Turnbuckles

Turnbuckles

Gallery RockMovement of the Yellow plate and tilt at the center

Difference in Z wires/NO wires

Z of all the points with the wires tensioned

22

Wires NO WiresENDCAPS

Gallery Rock Gallery Rock

3 points (at the middle, left and right were adjusted on the bottom endcaps in order to have the same Z as the top endcaps.

The adjustment for the point at the gallery side was lost by accident (link not tigthened enough) due to an internal tension, this worsened after releasing the wires

The top EC had a sagitta of 6 mm which became 9 mm after releasing the wires

+3 mm

Gallery Rock Gallery Rock

23

Wires NO Wires

Gallery Rock Gallery Rock The horizontal modules endcaps have as usual a sagitta oriented in the direction of the magnet, when the tension of the wires is released the sagitta is sligthly reduced for the endcaps of the gallery side (the side where the top and bottom were not aligned) while they moved by 5 mm at the bottom and 2 mm at the top in the direction of Borexino

Bottom BottomTop Top

+4.5 mm

+2 mm

24

Gallery Rock

Difference in Z wires/NO wires

Z of all the points with the wires tensioned

+5 mm

+2 mm

Gallery

Rock

Rock

Gallery

Top

Top

Bottom

Bottom

Bottom Top

Bottom Top

25

Wires NO Wires

The points on the surface had an increase in sagitta up to 5-6 mm

The non planarity of the plane is around 15 mm

Gallery RockGallery Rock

Gallery Rock Gallery Rock

26

Difference in Z vs X wires/NO wires

Z vs X of all the points with the wires tensioned

The maximal increase of sagitta takes place at the middle of the detector the minimum at the rock side

Gallery Rock Gallery Rock

Gallery Rock

27

Wires NO Wires

Seen from the side the points on the surface have a sagitta in the direction of the magnet

Bottom TopBottom Top

Gallery Rock Gallery Rock

28

Wires Wires

Difference in Z vs X and Y wires/NO wires

The maximal increase of sagitta takes place in correspondence to the second horizontal module from the top

Bottom Top

Bottom Top

Gallery Rock

Gallery Rock

Z vs Y of all the points with the wires tensioned

29

Top

Bottom

Rock Gallery

The points in the red regions by removing the wires moved in the direction of Borexino by 5-6 mm, the points in the blue regions practically did not move

Endcaps

Turnbukles

Yellow plate

Difference in Z wires/nowires

3D ANALYSIS OF THE DIFFERENCES WIRES/NO WIRES

30

Top

Bottom

Rock Gallery

Top

Top Rock

Gallery

Rock Gallery

Borexino

Magnet

Top

Gallery

Magnet

Borexino

Bottom

Magnet

Borexino

Rock

Bottom

The points in the red regions by removing the wires moved in the direction of Borexino up to 6 mm

-6 mm

31

Pillars

Top EC

Bottom EC after alignment and clamping

Yellow plate surface

Side EC

Side EC

Points on the surface

Wires at 0 tension,Base clamped for verticality

10 mm

RockGallery

32

Pillars (bottom)Pillars top

Bottom ECTOP EC

Lateral EC

Yellow plate

Surface points(12 per module)

Wires at 0 tension,Base clamped for verticalitySide view

Bottom TOP

33

ECEC

Turnbuckle reg.

Effect of going from 0 tension to 40 Kg

Clamps released

Effect of tensioning the wires at 40 Kg (shown on one slice)

34

Conclusions TT12 wires/nowires

1) A little effect is seen on the yellow plate deformation due to the wires (already with the wires tensioned the sagitta was 12 mm and it increased by 3 mm by releasing the wires)

2) We aligned the top and bottom endcaps in 3 points at the same Z but the point at the rigth moved by 8 mm due to some internal forces of the plane which likes to go in a skew position. This effect further increased when releasing the wires

3) On the surface points the effect of removing the wires increased the bump by about 6 mm on the contrary of what we observed on the mounting arch !