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

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

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

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.

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

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-0124 Changed sign convention for Rz

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

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

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

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

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

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

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

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