1. & Géraldine Conti May 21, 2007Monday Seminar 1 Detector Boxes Fiducialisation IT Frame Survey

2. IT Frame Survey Coordinate System (1)  The origin of the Survey coordinate system is at the Interaction Point (IP)  Correction of the nominal z values : z’ = z nominal - tan(0.003601)·x  6 half-frames to be surveyed ITA/C X (SU) horizontal Z (SU) vertical Y (SU) horizontal Towards pit 7 Towards LHC centre Towards pit 1 LHC Nominal Beam Line 3.601 mrad IP (ATLAS) horizontal x y z Survey coordinate system LHCb coordinate system IT1A IT3C IT2C IT1C IT3A IT2A ~6m ~3.7m IT Frames 2 Géraldine Conti May 21, 2007Monday Seminar

3. IT Frame preliminary results (2)  First IT « Geometrical Controls » (Local coordinate system) and Adjustments (Survey coordinate system) realized from the magnet area by a triangulation method (theodolite): IT1C (Oct.18 th 06, https://edms.cern.ch/document/790118 Geometrical Control ) IT1C (Oct.18 th 06, https://edms.cern.ch/document/790118 Geometrical Control )https://edms.cern.ch/document/790118 IT2C (Nov. 9 th 06, https://edms.cern.ch/document/794872 Geometrical Control ) IT2C (Nov. 9 th 06, https://edms.cern.ch/document/794872 Geometrical Control )https://edms.cern.ch/document/794872 IT3A (Jan.26 th 07, https://edms.cern.ch/document/816280 Before Adjustment ) IT3A (Jan.26 th 07, https://edms.cern.ch/document/816280 Before Adjustment )https://edms.cern.ch/document/816280 (Feb. 1 st 07, https://edms.cern.ch/document/817512 After Adjustment ) (Feb. 1 st 07, https://edms.cern.ch/document/817512 After Adjustment )https://edms.cern.ch/document/817512 IT3C (Dec. 5 th 06, https://edms.cern.ch/document/806184 Geometrical Control ) IT3C (Dec. 5 th 06, https://edms.cern.ch/document/806184 Geometrical Control )https://edms.cern.ch/document/806184 (Feb. 2 nd 07, https://edms.cern.ch/document/818463 Before Adjustment ) (Feb. 2 nd 07, https://edms.cern.ch/document/818463 Before Adjustment )https://edms.cern.ch/document/818463  Due to Beam Pipe UX85 2 & 3 (and protections) installation, no access to magnet area possible any more : New strategy for IT Survey (2 steps) 1) Frame survey measurements in Opened position 2) Frame survey measurements in Closed position 3 Géraldine Conti May 21, 2007Monday Seminar

4. Survey in opened position : Photogrammetry (3)  Theodolite measurements of fiducial marks give the global scale in almost closed position.  Take ~150 photographs of the frame in opened position, which contains permanent coded photo targets (20) recognized by the system.  Photogrammetric targets are used as a reference for the IT detector boxes positions. 4 Géraldine Conti May 21, 2007Monday Seminar Complete E frame geometry on precision rails obtained by the transformation of the coordinates in opened position to the coordinates in almost closed position (with a best fit 3D ).

5. Survey in opened position (4) View from IP : 476 477 479 474475 481 480 478 487 489 491493 488 490 486 482483 485484 Coded targets 492 35mm thickness=0.12mm 35mm thickness=0.12mm 35mm Fiducial marks F7 F1F2 F4 F3 F6 F5 CT CB CTLCTR CBLCBR CTR 150mm 486 Photogrammetric targets TT_LTT_R TB_RTB_L TB_R x z y 5 Géraldine Conti May 21, 2007Monday Seminar

6. IT Frame Survey : Results (5) IT1A D x (mm) D z (mm) F12.83.6 F20.41.2 F31.3-4.6 F40.91.2 F51.71.2 F63.85.5 F74.24.5 CT4.83.9 CT_L4.53.4 CT_R4.34.5 CB4.0188.3 CB_L3.97.1 CB_R5.27.3 https://edms.cern.ch/document/834051  IT1A (March 30 th 07)  IT2A (April 19 th 07) https://edms.cern.ch/document/839426 IT2A D x (mm) D z (mm) F11.5-3.4 F22.1-1.1 F31.3-0.7 F40.8 F50.8 F62.84.0 F72.13.8 CT-0.60.9 CT_L2.71.0 CT_R0.31.9 CB-1.60.6 CB_L1.60.8 CB_R-0.91.6 6 Géraldine Conti May 21, 2007Monday Seminar  The most important CT_L/R and CB_L/R targets positions are adjusted thanks to crenels on the brackets.

7. Survey in closed position (6)  Theodolite method for the targets on the IT detector boxes and some accessible targets on the E frames.  Final measured positions of the IT detector boxes.  Possible to make the measurements from the outside of the magnet in the RICH1 region. 7 Géraldine Conti May 21, 2007Monday Seminar

8. IT box Fiducialisation  12 IT detector boxes to be fiducialised.  IT detector box fiducialisation test performed on Oct. 25 th -26 th 06.  Precision obtained during the test at 1  level is 0.05mm and 0.1mrad on the angles.  Needs for fiducialisation : Rotating support for the box Rotating support for the box Movable neon lights to ease the measurements of the detector crosses Movable neon lights to ease the measurements of the detector crosses Table stability (improved with long diagonal bars) Table stability (improved with long diagonal bars) https://edms.cern.ch/document/790654 8 Géraldine Conti May 21, 2007Monday Seminar

9. IT Boxes Offsets in ConDB Nominal positions Measured positions Offset : dPos=(dx,dy,d z) dz dx dy x (horizontal) z (along beam) y (vertical) Rotation : dRot=( , ,  )    9 Géraldine Conti May 21, 2007Monday Seminar Additional targets

10. IT sensors Offsets in ConDB Nominal positions 135 142 126 127 131 130 134 Measured positions 134 Offset : dPos=(dx,dy,dz) z y x 10 Géraldine Conti May 21, 2007Monday Seminar Rotation : dRot=( , ,  )  

11. Survey Timescale  Frame Survey in Opened Position : IT3A and ITC : IT3A and ITC : IT3A survey is forseen on Thursday 24 th of May.IT3A survey is forseen on Thursday 24 th of May. The ITC photogrammetric measurements should be finished up to mid-July.The ITC photogrammetric measurements should be finished up to mid-July.  Frame Survey in Closed Position : All IT frames : All IT frames : Depends on when the IT detector boxes will be finished and when the beam pipe protection will be removed.Depends on when the IT detector boxes will be finished and when the beam pipe protection will be removed.  IT Detector Box Fiducialisation : All IT boxes : All IT boxes : The Fiducialisation of the first IT detector box is forseen tomorrow in the clean room at CERN!The Fiducialisation of the first IT detector box is forseen tomorrow in the clean room at CERN! 11 Géraldine Conti May 21, 2007Monday Seminar