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Outer Tracker Nominal Position

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Presentation on theme: "Outer Tracker Nominal Position"— Presentation transcript:

1 Outer Tracker Nominal Position
Antonio Pellegrino (on behalf of the LHCb OT Group) CERN, Introduction C-Frames Nominal Positions Reference Frames Tables of Nominal Positions Comparison with XML Modifications to nominal values Outlook

2 Global View January 12, 2019 Antonio Pellegrino

3 In Reality… January 12, 2019 Antonio Pellegrino

4 “A” Side “C” Side OT C-Frames Z X IP T3-Q02-VX T3-Q02-XU T2-Q02-VX
January 12, 2019 Antonio Pellegrino

5 Nominal Positions ZSurvey XSurvey 682 685 120 Rail Description
XSurvey (mm) ZSurvey (mm) T1-XU T1 – Layers L0,L1 {X,U} -7888 28.4 T1-VX T1 – Layers L2,L3 {V,X} -8008 28.8 T2-XU T2 – Layers L0,L1 {X,U} -8570 30.9 T2-VX ST2 – Layers L2,L3 {V,X} -8690 31.3 T3-XU T3 – Layers L0,L1 {X,U} -9255 33.3 T3-VX T3 – Layers L2,L3 {V,X} -9375 33.8 January 12, 2019 Antonio Pellegrino

6 Survey and LHCb Frame   3.601  10-3 rad January 12, 2019
Antonio Pellegrino

7 Nominal Positions ZSurvey XSurvey 682 685 120 Rail XSurvey (mm)
ZSurvey (mm) ZLHCb (mm) YLHCb (mm) T1-XU -7888 28.4 -0.005 T1-VX -8008 28.8 -0.037 T2-XU -8570 30.9 0.039 T2-VX -8690 31.3 0.007 T3-XU -9255 33.3 -0.027 T3-VX -9375 33.8 0.040 Rounding of ZSurvey  YLHCb ≠ 0, C-Frames centers not exactly in YLHCb = 0 January 12, 2019 Antonio Pellegrino

8 36  (Px,Py,Pz) survey points: mostly only 18 measured (1 Layer)
2 3 4 5 6 7 8 9 dowel pins 1 2 3 4 5 6 7 8 9 2 Layers  9 Modules/Layer  2 dowel pins/Module (top/bottom) 36  (Px,Py,Pz) survey points: mostly only 18 measured (1 Layer) January 12, 2019 Antonio Pellegrino

9 Stick survey target in here!
Targets Stick survey target in here! dowel pins January 12, 2019 Antonio Pellegrino

10 Positions along the beam axis
T1-L1-Q2-M1 32 10 C 6.5 YSurvey 54.5 M T1-L1-Q2-M1 6.5 XSurvey 15 T January 12, 2019 Antonio Pellegrino

11 Nominal XSurvey T1-L0-Q0-M1 -7823.5 T1-L0-Q0-M2 T1-L0-Q0-M3
XSurvey (mm) YSurvey (mm) ZSurvey (mm) T1-L0-Q0-M1 T1-L0-Q0-M2 T1-L0-Q0-M3 T1-L0-Q0-M4 T1-L0-Q0-M5 T1-L0-Q0-M6 T1-L0-Q0-M7 T1-L0-Q0-M8 T1-L0-Q0-M9 XSurvey (mm) YSurvey (mm) ZSurvey (mm) T1-L1-Q0-M1 T1-L1-Q0-M2 T1-L1-Q0-M3 T1-L1-Q0-M4 T1-L1-Q0-M5 T1-L1-Q0-M6 T1-L1-Q0-M7 T1-L1-Q0-M8 T1-L1-Q0-M9 XSurvey (mm) YSurvey (mm) ZSurvey (mm) T1-L0-Q2-M1 T1-L0-Q2-M2 T1-L0-Q2-M3 T1-L0-Q2-M4 T1-L0-Q2-M5 T1-L0-Q2-M6 T1-L0-Q2-M7 T1-L0-Q2-M8 T1-L0-Q2-M9 XSurvey (mm) YSurvey (mm) ZSurvey (mm) T1-L1-Q2-M1 T1-L1-Q2-M2 T1-L1-Q2-M3 T1-L1-Q2-M4 T1-L1-Q2-M5 T1-L1-Q2-M6 T1-L1-Q2-M7 T1-L1-Q2-M8 T1-L1-Q2-M9 January 12, 2019 Antonio Pellegrino

12 Vertical Positions 4900 9.323 January 12, 2019 Antonio Pellegrino

13 “Special” OT Modules Z Z Y “F” module are one physical unit
+7mm Z S1U S2U S3U S1U -7mm Z Y S1L S2L S3L S1L “F” module are one physical unit “S” modules are realized gluing together two separate parts (“U” and “L”) Y January 12, 2019 Antonio Pellegrino

14 Vertical Positions S2 S3 Z Y +7mm -7mm January 12, 2019
Antonio Pellegrino

15 Nominal ZSurvey T1-L0-Q0-M1 -7823.5 -2421.6 T1-L0-Q0-M2 T1-L0-Q0-M3
XSurvey (mm) YSurvey (mm) ZSurvey (mm) T1-L0-Q0-M1 T1-L0-Q0-M2 T1-L0-Q0-M3 T1-L0-Q0-M4 T1-L0-Q0-M5 T1-L0-Q0-M6 T1-L0-Q0-M7 T1-L0-Q0-M8 T1-L0-Q0-M9 XSurvey (mm) YSurvey (mm) ZSurvey (mm) T1-L1-Q0-M1 T1-L1-Q0-M2 T1-L1-Q0-M3 T1-L1-Q0-M4 T1-L1-Q0-M5 T1-L1-Q0-M6 T1-L1-Q0-M7 T1-L1-Q0-M8 T1-L1-Q0-M9 XSurvey (mm) YSurvey (mm) ZSurvey (mm) T1-L0-Q2-M1 2478.4 T1-L0-Q2-M2 T1-L0-Q2-M3 T1-L0-Q2-M4 T1-L0-Q2-M5 T1-L0-Q2-M6 T1-L0-Q2-M7 T1-L0-Q2-M8 T1-L0-Q2-M9 2471.4 XSurvey (mm) YSurvey (mm) ZSurvey (mm) T1-L1-Q2-M1 2469.1 T1-L1-Q2-M2 T1-L1-Q2-M3 T1-L1-Q2-M4 T1-L1-Q2-M5 T1-L1-Q2-M6 T1-L1-Q2-M7 T1-L1-Q2-M8 T1-L1-Q2-M9 2462.1 January 12, 2019 Antonio Pellegrino

16 Distance from the Beam Line
129.67 170 86 258.23 341.25 341.25 257.25 341.25 Y= Y= 340 340 172 340 1.25 1.25 1.25 January 12, 2019 Antonio Pellegrino

17 Nominal YSurvey T1-L0-Q0-M1 -7823.5 2816.63 -2421.6 T1-L0-Q0-M2
XSurvey (mm) YSurvey (mm) ZSurvey (mm) T1-L0-Q0-M1 T1-L0-Q0-M2 T1-L0-Q0-M3 T1-L0-Q0-M4 T1-L0-Q0-M5 T1-L0-Q0-M6 T1-L0-Q0-M7 769.13 T1-L0-Q0-M8 427.88 T1-L0-Q0-M9 170.63 XSurvey (mm) YSurvey (mm) ZSurvey (mm) T1-L1-Q0-M1 T1-L1-Q0-M2 T1-L1-Q0-M3 T1-L1-Q0-M4 T1-L1-Q0-M5 T1-L1-Q0-M6 T1-L1-Q0-M7 985.27 T1-L1-Q0-M8 642.72 T1-L1-Q0-M9 383.88 XSurvey (mm) YSurvey (mm) ZSurvey (mm) T1-L0-Q2-M1 2478.4 T1-L0-Q2-M2 T1-L0-Q2-M3 T1-L0-Q2-M4 T1-L0-Q2-M5 T1-L0-Q2-M6 T1-L0-Q2-M7 769.13 T1-L0-Q2-M8 427.88 T1-L0-Q2-M9 170.63 2471.4 XSurvey (mm) YSurvey (mm) ZSurvey (mm) T1-L1-Q2-M1 2469.1 T1-L1-Q2-M2 T1-L1-Q2-M3 T1-L1-Q2-M4 T1-L1-Q2-M5 T1-L1-Q2-M6 900.76 T1-L1-Q2-M7 558.21 T1-L1-Q2-M8 215.66 T1-L1-Q2-M9 -41.96 2462.1 January 12, 2019 Antonio Pellegrino

18 Tables of Nominals All nominal values of the survey targets (dowel pins) coordinates can be found in the tables in OT Web Page Installation Survey Overview of Raw Data January 12, 2019 Antonio Pellegrino

19 Comparison to XML (XSurvey and YSurvey)
Nominal values in the XML description of the OT Geometry (provided by Jan Amoraal): One nominal value taken at each module centre   (Antonio’s table) – (Jan’s XML) XSurvey YSurvey Comparison shows identical values (differences ~10 m from rounding) January 12, 2019 Antonio Pellegrino

20 Comparison to XML (ZSurvey)
Rail XSurvey (mm) ZSurvey (mm) ZLHCb (mm) YLHCb (mm) T1-XU -7888 28.4 -0.005 T1-VX -8008 28.8 -0.037 T2-XU -8570 30.9 0.039 T2-VX -8690 31.3 0.007 T3-XU -9255 33.3 -0.027 T3-VX -9375 33.8 0.040 Rounding of ZSurvey  YLHCb ≠ 0, C-Frames centers not exactly in YLHCb = 0 January 12, 2019 Antonio Pellegrino

21 Adjustments What knobs can you turn if the survey turns out to be crap? Displace hook block wrt to frame modifies XLHCb Displace roller block wrt to frame modifies ZLHCb Adjust spacer under trolley modifies YLHCb January 12, 2019 Antonio Pellegrino

22 Modifications to Nominal Values
During the OT installation, various iterations of surveys and adjustments were carried out All 18 dowel pins of one of the two layers of a C-Frame were surveyed typically L0 (X) and L2 (V) (for one C-Frame, both layers were surveyed, as a check) Comparing the surveyed values to the nominal tables, adjustments were made When the adjustment range was not sufficient to achieve the nominal values, the priority was given to limiting rotations avoiding rotations around XLHCb and YLHCb sometime implied modifying the nominal ZLHCb of a half-station (both sides A and C) a slight deformation in the shape of all C-Frames effectively caused an effect of rotation around ZLHCb. This could be eliminated to the cost of a systematical modification (“staggering”) of the YLHCb of all modules. These modifications to the nominal values have not been reported on the OT Web Page, but only through “private communications” (Jan and Marc) January 12, 2019 Antonio Pellegrino

23 Modifications to Nominal XSurvey
Limiting rotations around XLHCb and YLHCb sometime implied modifying the nominal ZLHCb of a half-station (both sides A and C) Half Station XSurvey (mm) XSurvey (mm) T1-XU -7888 0.0 T1-VX -8008 0.5 T2-XU -8570 2.5 T2-VX -8690 3.5 T3-XU -9255 T3-VX -9375 January 12, 2019 Antonio Pellegrino

24 Modifications to Nominal YSurvey
A slight deformation in the shape of all C-Frames effectively caused an effect of rotation around ZLHCb. This could be eliminated to the cost of a systematical modification (“staggering”) of the YLHCb of all modules Expected Instead was Compromise Z   0.46  10-3 rad Y January 12, 2019 Antonio Pellegrino

25 Summary and Outlook OT C-Frames were adjusted with respect to survey targets nominal positions typically surveyed one layer per C-Frame (L0 (X) and L2 (V)) Systematic comparison with center modules nominal positions in OT Geometry XML comparison ok differences in ZSurvey due to rounding, easy to correct comparison of dowel pin positions under way deviations of “special” modules in T1 and T3 not yet implemented Modifications to nominal positions were done to limit rotations nominal ZLHCb of a half-station (both sides A and C) systematical modification (“staggering”) of the YLHCb of all modules what is the right place to “book-keep” these modifications?? January 12, 2019 Antonio Pellegrino

26 Jan’s Transformation in XML
ZCLHCb January 12, 2019 Antonio Pellegrino

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