Geometrical Measurements of the TEC Elements Goals internal survey external survey LINK calibration Means 3D CMM Cosmics Geodesy Procedure Conclusions A.Ostaptchouk, D.Pandoulas, S.Schael, R.Siedl I. Physikalisches Institut, RWTH-Aachen Talk presented by A.O. for the TK TPO meeting on 01.11.0
19
Embed
Geometrical Measurements of the TEC Elements Goals internal survey external survey LINK calibration Means 3D CMM Cosmics Geodesy Procedure Conclusions.
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Geometrical Measurementsof the TEC Elements
Goals internal survey external survey LINK calibration
Means
3D CMM Cosmics Geodesy
Procedure
Conclusions
A.Ostaptchouk, D.Pandoulas, S.Schael, R.Siedling
I. Physikalisches Institut, RWTH-Aachen
Talk presented by A.O. for the TK TPO meeting on 01.11.01
Geometrical Measurements of the TEC Elements
- Goals -
Goals of the geometrical measurements
Internal survey: measurement of the TEC internal geometry
External survey: measurement of positions of the TEC external fiducial marks w.r.t. the TEC internal coordinate frame
LINK calibration: measurement of LINK element orientations
Geometrical Measurements of the TEC Elements
- Goals -
Internal survey: measurement of TEC geometry for
Quality Control (QC) of the TEC petals and discs
Precise ( 50 m) measurement of module rcoordinates in petal coordinate frame to provide a starting point for alignment with tracks
Less precise ( 100 m for r-coordinates, 500 m for z-coordinates) measurement of petals in the TEC coordinate system to provide the starting point for the TEC optical alignment system
Geometrical Measurements of the TEC Elements
- Goals -
External survey: measurement of positions of the TEC external fiducial marks with
100 m precision for fiducial mark r-coordinates, and 200 m precision for fiducial mark z-coordinates in the TEC coordinate system (for precise positioning of the TEC in the CMS coordinate frame)
LINK calibration: measurement of LINK element orientations
20 rad precision for tiltmeter -orientation w.r.t. gravity 100 rad precision for periscope - and -orientations in the TEC coordinate system
Geometrical Measurements of the TEC Elements
- Means -
Means of the geometrical measurements
3D Coordinate Measuring Machine (CMM)
Cosmic Rays
Geodesy
CMS Tracker Review September 2001
Geometrical Measurements of the TEC Elements
- Clean Room -
Parameters of Aachen clean room
Class 100 000 Temperature control: 1 oC Humidity control: 10%
Geometrical Measurements of the TEC Elements
- 3D CMM -
3D Coordinate Measuring Machine Type Wenzel RS-1618 Dynamic range 2500 1600 1800 mm3
Precision 20 + (L/50 mm) m 70 m Sensitive elements mechanical feeler or video camera