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Plus Endcap Transfer Lines

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

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Plus Endcap Transfer Lines

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  1. James N. Bellinger 11-May-2009 Plus Endcap Transfer Lines James N. Bellinger University of Wisconsin-Madison 11-Monday-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 Reported error 0.3mm on position, 0.1mrad on angles From CMS-SG-UR-0124 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

  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

  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.

  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

  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

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

  14. James N. Bellinger 11-May-2009 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

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