Progress in validation. Looking at the cocoa fit for the lasers for event 1267911843. The Cocoa results are
| 1 | 4 | 1 | 7032.8912 | 1759.2135 | 10714 | 0.026494767 | 180.01252 | 105.1366 |
| 1 | 4 | 2 | 1986.5992 | 6972.3452 | 10714 | 0.00064711389 | 180.01711 | 165.17982 |
| 1 | 4 | 3 | -5205.9326 | 5045.5743 | 10714 | 180.0055 | 0.0049190731 | 45.159394 |
| 1 | 4 | 4 | -6970.2367 | -1990.4906 | 10714 | 179.99611 | -0.0087533679 | 105.94613 |
| 1 | 4 | 5 | -1991.5035 | -6970.3696 | 10714 | 180.03556 | -0.0014332351 | 165.48232 |
| 1 | 4 | 6 | 5044.609 | -5206.0101 | 10714 | 0.023118834 | 179.97905 | 44.601721 |
| -1 | 4 | 1 | 7032.4883 | 1760.3134 | -10714 | 359.99704 | 0.002720058 | 104.64505 |
| -1 | 4 | 2 | 1986.3499 | 6971.7836 | -10264 | 359.98923 | 0.0015836373 | 164.54085 |
| -1 | 4 | 3 | -5206.8968 | 5044.3817 | -10714 | 180.00037 | 179.9981 | 44.560902 |
| -1 | 4 | 4 | -6970.1242 | -1993.0303 | -10264.001 | 0.0083905096 | 0.040320711 | -75.91959 |
| -1 | 4 | 5 | -1992.4496 | -6969.9833 | -10713.999 | 0.041627968 | 0.0038670428 | -15.361555 |
| -1 | 4 | 6 | 5044.3579 | -5206.3745 | -10264 | 0.042130186 | -0.034244937 | 45.428421 |
This I can transform to the ideal Transfer Line system, and get for the Vertical (ie, approximately radial) and Horizontal laser centers:
| Laser | Vertical location | Horizontal location |
| Plus 1 | -1.0250575 | -0.43802991 |
| Minus 1 | 0.14164251 | -0.54252636 |
| Plus 2 | -0.32724984 | -0.16574928 |
| Minus 2 | -0.23179731 | -0.77273681 |
| Plus 3 | -0.61426366 | -0.19381797 |
| Minus 3 | 0.91082424 | -0.35532116 |
| Plus 4 | -1.3147489 | -1.0990306 |
| Minus 4 | 1.1675300 | -0.55037455 |
| Plus 5 | 0.37075971 | -0.70850127 |
| Minus 5 | -0.64308451 | -0.83676972 |
| Plus 6 | -0.12310729 | -0.82158737 |
| Minus 6 | -0.55833151 | -0.74147217 |
Not all of the hand fits worked this time (used to be just one failed). I'll have to revisit the algorithm and smarten it up, but in the meantime I want to look at the ones that fit.
| Where | Verticalal | Horizontal | |
| Plus | 1 | -1.289 | |
| Minus | 1 | -0.349 |
In Transfer Plate coordinates:
| Location | Initial X | Final X | Initial Z | Final Z |
| Plus 1 | 397.507 | 398.4764 | -73.175 | -72.7392 |
| Minus 1 | -442.507 | -442.3097 | -73.175 | -72.6347 |
| Plus 2 | -208.507 | -208.1682 | -73.175 | -73.1080 |
The DCOPS profile center is not at 14.336,14.336. The coordinates relative to the center are
| Location | Vertical | Horizontal |
| corrected for orientation | ||
| Plus 1 | -1.28125 | -0.6616 |
| Minus 1 | 0.0135 | -0.99265 |
| Plus 2 | -0.0949 | 0.62345 |
| Minus 2 | -0.07 | 1.30285 |
| Plus 3 | -0.6244 | -0.59625 |
| Minus 3 | 0.54495 | -0.804 |
| Plus 4 | 0.66605 | 1.412 |
| Minus 4 | -1.45765 | 1.1852 |
| Plus 5 | 0.31465 | -1.05625 |
| Minus 5 | -0.6904 | -1.31355 |
| Plus 6 | -0.35985 | 1.1943 |
| Minus 6 | -0.0911 | 1.1467 |
The astute reader will notice that there are substantial points of difference between the profile center distribution and the laser fit distribution. Indeed, the corrections for DCOPS orientation seem to make the horizontal discrepancies worse! (Signs change for DCOPS on lines 2,4, and 6 for both ME+4 and ME-4).
Bug found in hand calculation. Also need to revise so I'm comparing apples to apples with the laser intercepts. The calculations need to be comparable to the laser positions, not the intercept of the line at z=0.
Also, the fact that Cocoa wants all the Horizontal laser centers to be negative suggests that something is wrong. Either I have Horizontal/Vertical interchanged, and thus the orientation is misapplied in the above table; or Cocoa is doing a stinking job of fitting.
Modified 08-March-2010 at 16:02
http://hep.physics.wisc.edu/~jnb/cms/08Mar2010
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