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Commit | Line | Data |
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890e35a5 | 1 | > Title: |
2 | Alignment of the EMCAL Supermodules for year 1 with corrected geometry | |
3 | > Date: | |
4 | 05.11.2010 | |
5 | > Subdetector: | |
6 | EMCAL | |
7 | > Report URL: | |
8 | https://edms.cern.ch/document/1014917 | |
9 | > Version: | |
10 | 1 | |
11 | > General Observations: | |
12 | Surveyed points on the EMCAL support rails are the only reliable | |
13 | points to use. They are located at the rail ends, and we have a | |
14 | relationship between these survey marks and the modules, assuming | |
15 | that the detector as built matches the design. The relationship is | |
16 | based on a simplified 3D model of the supermodule, which is an 8 | |
17 | cornered box, where 4 corners coincide with the eta = 0 end of the | |
18 | modules and the other 4 corners are the survey marks. After | |
19 | entering the positions of the 4 survey marks, the 3D application | |
20 | CATIA gives the position of the 4 end module corners and the phi | |
21 | variation between 2 adjacent supermodules. | |
22 | ||
23 | The goal is to convert the points from CATIA to a | |
24 | transformation matrix for the center of each virtual (software) SuperModule. | |
25 | The virtual supermodules are also 8-cornered boxes, but the | |
26 | dimensions are determined differently. The x dimension matches the | |
27 | size of the strip modules, the y dimension is determined by the strip | |
28 | module size and placement (the angle of the strip module changes the | |
29 | position of its top-most edge), and the z length is currently 350.0 | |
30 | cm, which is approximately 42 cm longer than the active area of the | |
31 | physical supermodules. This extra length is a historical artifact from | |
32 | the development days of the detector. | |
33 | ||
34 | Point name format is SMVolumeID_CATIAPointID. | |
35 | > Coordinate System: | |
36 | ALICEPH | |
37 | > Units: | |
38 | m | |
39 | > Nr Columns: | |
40 | 7 | |
41 | > Column Names: (choose one) | |
42 | Point Name,XPH,YPH,ZPH,Point Type,PrecisionXY(mm),PrecisionZ(mm) | |
43 | > Data: | |
44 | 40960_00 -0.709 4.312 0.000 T 1 2 | |
45 | 40960_01 -0.714 4.318 3.077 T 1 2 | |
46 | 40960_10 0.730 4.333 0.000 T 1 2 | |
47 | 40960_11 0.726 4.340 3.077 T 1 2 | |
48 | 40961_00 0.730 4.333 0.000 T 1 2 | |
49 | 40961_01 0.735 4.327 -3.077 T 1 2 | |
50 | 40961_10 -0.709 4.312 0.000 T 1 2 | |
51 | 40961_11 -0.705 4.307 -3.077 T 1 2 | |
52 | 40962_00 -2.158 3.801 0.000 T 1 2 | |
53 | 40962_01 -2.170 3.809 3.077 T 1 2 | |
54 | 40962_10 -0.807 4.299 0.000 T 1 2 | |
55 | 40962_11 -0.817 4.304 3.077 T 1 2 | |
56 | 40963_00 -0.807 4.299 0.000 T 1 2 | |
57 | 40963_01 -0.797 4.295 -3.077 T 1 2 | |
58 | 40963_10 -2.158 3.801 0.000 T 1 2 | |
59 | 40963_11 -2.147 3.794 -3.077 T 1 2 |