Commit | Line | Data |
---|---|---|

54a4c3a6 | 1 | > Title: |

2 | Alignment of the EMCAL Supermodules for year 1 | |

3 | > Date: | |

a153e485 | 4 | 12.10.2010 |

54a4c3a6 | 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: | |

a153e485 | 44 | 40960_00 -0.7148 4.363501 0.0112 T 1 2 |

45 | 40960_01 -0.7148 4.3635 3.0912 T 1 2 | |

46 | 40960_10 0.7364 4.363501 0.0112 T 1 2 | |

47 | 40960_11 0.7364 4.3635 3.0912 T 1 2 | |

48 | 40961_00 0.7364 4.3635 0.0112 T 1 2 | |

49 | 40961_01 0.7364 4.363501 -3.0688 T 1 2 | |

50 | 40961_10 -0.7148 4.3635 0.0112 T 1 2 | |

51 | 40961_11 -0.7148 4.363501 -3.0688 T 1 2 | |

52 | 40962_00 -2.17742 3.849361 0.0155 T 1 2 | |

53 | 40962_01 -2.17742 3.849360 3.0955 T 1 2 | |

54 | 40962_10 -0.81374 4.345701 0.0155 T 1 2 | |

55 | 40962_11 -0.81374 4.345700 3.0955 T 1 2 | |

56 | 40963_00 -0.81374 4.345700 0.0155 T 1 2 | |

57 | 40963_01 -0.81374 4.345701 -3.0645 T 1 2 | |

58 | 40963_10 -2.17742 3.849360 0.0155 T 1 2 | |

59 | 40963_11 -2.17742 3.849361 -3.0645 T 1 2 |