1. Plus Endcap Transfer Lines
James N. Bellinger
University of Wisconsin-Madison
11-Monday-2009
James N. Bellinger 11-May-2009

2. Available Data End to end data w/ both lasers
Only for PT1
Plus Endcap with Plus lasers 0T
3.8T
Minus Endcap with Minus lasers
Model not complete so I didn’t check closely

3. Plus Endcap SDF Cocoa SDF for the entire Plus Endcap is ready
Except for piston Z-sensors and inclinometers
This work was done with a limited set of measurements: only transfer line data
Complete set of measurements took 30 minutes to execute

4. Relative positions Without some absolute reference, the endcap
could be on Mars, but
we can still get relative
displacements.
We also have a handle on
torsion of the endcap.

5. Testing the results
Pre- and post-CRAFT survey measurements of YE disk x/y and z- rotations
Hand calculation trying to fit 30 parameters
Cocoa results

6. Photogrammetry YE+1 Pre YE+2 YE+3 Post X mm 1.46 0.17 1.55 0.58 -0.15
Reported error 0.3mm on position, 0.1mrad on angles
YE+1
Pre
YE+2
YE+3
Post
X mm
1.46
0.17
1.55
0.58
-0.15
0.59
Y mm
-0.32
0.78
0.56
-1.37
0.57
-0.04
Rz mrad
-0.50
-0.40
0.20
-0.43
-0.46
0.18
From CMS-SG-UR Changed sign convention for Rz

7. Relative Photogrammetry
Fix YE+3 at (0,0) with no rotation
Assume entire shift happened at start of CRAFT, and use Post- CRAFT data
YE+1- YE+3
YE+2-
YE+3
dX mm
-0.01
-0.74
dY mm
-1.33
0.61
dRz mrad
-0.61
-0.64

8. Hand calculation
Minimize chi-squared of deviations of laser hit positions from data
30 parameters, PARI matrix code
Needs tweaking
Does not agree w/ photogrammetry
YE+1- YE+3
YE+2-
YE+3
dX mm
-1.03
-1.08
dY mm
1.28
2.07
dRz mrad
-0.98
-0.86

9. Cocoa on Plus Endcap Changed hierarchy to be disk-based Data from 0T
Fixed YE+3 position, rotations
X/Y do not agree with photogrammetry
Rz are consistent with photogrammetry values, similar to hand calc.
YE+1- YE+3
YE+2-
YE+3
dX mm
0.97
0.59
dY mm
-1.22
-1.51
dRz mrad
-0.73
-0.76

10. Comparison Agreement is not very good Hand calc wrong sign? PG did not
accurately
estimate our
known Z-sensor
displacement PG
Hand
Cocoa

11. Transfer Plate Displacements
At each transfer plate, compare shift between YE+3 and YE+2 positions
Ignore Z, Rx, and Ry PG
Hand
Cocoa
TP1
3.9
4.0
7.1
TP2
3.0
5.0
6.6
TP3
4.6
7.3
5.2
TP4
5.4
8.5
TP5
5.5
8.0
4.7
TP6
4.8
6.0
6.3

12. Transfer Plate Displacements
At each transfer plate, compare shift between YE+2 and YE+1 positions
Ignore Z, Rx, and Ry
BUT! See next slide PG
Hand
Cocoa
TP1
1.9
1.7
0.6
TP2
2.0
1.4
0.4
TP3
2.2
0.7
0.3
TP4
2.3
0.2
TP5
1.0
TP6
1.5

13. Real World Measurement
PT 2 between
YE+1 & YE+2
Rod misses by
~10mm
James N. Bellinger 11-May-2009

14. PG deviations between YE+1 and YE+2
None predict this
PG deviations between YE+1 and YE+2
are larger than those from the hand
calculation or from Cocoa, but nothing
even comes close to predicting the 10mm
shift at PT2
James N. Bellinger 11-May-2009