1. OT Survey & Adjustment 11-06-2007 Outline: Survey technique
C-Frame survey and adjustment
Survey data
Photogrammetry
Long-term??

2. OT Overview Modules Bridge C-frame OT Cryo-Platform
Table & Cable Trays
December 31, 2018
Antonio Pellegrino

3. “A” Side “C” Side OT C-Frames Z X IP T3-Q02-VX T3-Q02-XU T2-Q02-VX
December 31, 2018
Antonio Pellegrino

4. 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)
December 31, 2018
Antonio Pellegrino

5. Stick survey target in here!
Targets
Stick survey target in here!
dowel pins
December 31, 2018
Antonio Pellegrino

6. 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
December 31, 2018
Antonio Pellegrino

7. Example Survey: Z of T2-XU
ZSU
YSU
XSU
Dowel pin deviations from nominal positions in XSU (ZLHCb)
toward Magnet
toward RICH2
December 31, 2018
Antonio Pellegrino

8. Example Survey: X of T2-XU
ZSU
YSU
XSU
Dowel pin deviations from nominal positions in ZSU (YLHCb)
higher
lower
December 31, 2018
Antonio Pellegrino

9. Example Survey: X of T2-XU
ZSU
YSU
XSU
modified (known translation in XLHCb) after Survey!
Dowel pin deviations from nominal positions in YSU (XLHCb)
toward A
toward C
December 31, 2018
Antonio Pellegrino

10. Adjustment Ready & Survey Up to date
Overview of Survey
Adjustment Ready & Survey Up to date
Adjustment Ready, but modified (known translation in XLHCb) after Survey
T3-Q13-VX
T3-Q02-VX
T3-Q13-XU
T3-Q02-XU
“A” Side
T2-Q13-VX
T2-Q02-VX
“C” Side
T2-Q13-XU
T2-Q02-XU
T1-Q13-VX
T1-Q02-VX
T1-Q13-XU
T1-Q02-XU X IP
December 31, 2018
Antonio Pellegrino

11. Survey Data Web Page In cooperation with the CERN Survey group
(J.-C. Gayde, S. Berni, et al.)
Overview on OT Survey Web Page
Description
Data
Analysis
Date
Comment
Table Survey at CERN
EDMS
11-May-2006
Bridge Survey at CERN
EDMS
OT-Alignment-1.9.doc
13-Jul-2006
Bridge+Table-Analysis xls
T3-Q02-VX Survey
EDMS
T3-VX.xls
3-Sep-2007
T3-Q13-VX Survey
EDMS Report with “raw” survey data
Analysis: determination of dowel pins deviations from nominal positions
December 31, 2018
Antonio Pellegrino

12. Photogrammetry
Concept: Measure several points on detector surface to check flatness between top/bottom dowel pins
Targets
about 80% of OT surface equipped with targets
equip the rest?? (main problem manpower and access)
Surveyed T1-Q13-XU in open position
Survey T1-Q13-XU in closed position and compare??
December 31, 2018
Antonio Pellegrino

13. Summary All C-Frames surveyed and adjusted
at least one layer per C-Frame, 18 dowel pins
~200 points, some of which measured 9 times!?
CAVEAT: must be compatible with C-Frame closure once all electronics installed (June + July 2008)
Survey Data published in EDMS reports
a couple of mistakes to be corrected  new reports
Discussion with Jan & Wouter about alignment constants for CondDB
(X0,Y0,Z0,,,) per module
make planar fit to each layer and derive (X0,Y0,Z0,,,) ?
1-2 weeks work
Photogrammetry: decide how to proceed
if present schedule, probably give up
December 31, 2018
Antonio Pellegrino