2 Alignment of the EMCAL Supermodules for year 1 with corrected geometry
8 https://edms.cern.ch/document/1014917
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.
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.
34 Point name format is SMVolumeID_CATIAPointID.
41 > Column Names: (choose one)
42 Point Name,XPH,YPH,ZPH,Point Type,PrecisionXY(mm),PrecisionZ(mm)
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