TCM, Muon Barrel Alignment, Laurent Brunel 010399 1

1
Muon Barrel AlignmentTechnical statusLaurent
Brunel CERN, Debrecen
2
Structure of this presentation

• First part principle of the system
• Second part elements of the system
• Third part plans

3
First part principle
4
CMS alignment
5
Task
6
3D network
7
Geometrical chain
III. camera -gt link point By video cameras AND
by rigid structures (MAB).
8
Chamber calibration bench
Location (planned) CERN
Survey sockets
Calibration plates
Muon chamber
Optical sources inside the passage
Alignment passage
Reference blocks precisely connected to the wires
survey fiducials
Video camera
Status Conceptual design ready (details CMS IN
1998/005)
9
MAB calibration bench
- Location ISR laboratory - To be ready in
2002/2003 - Find the best configuration
10
Second Part elements

• MAB (Module optique pour lAlignement du Baril)
• Z bar
• Camera boxes
• LED holders
• LED electronics
• MAB electronics
• Software

11
MABs
Support
LINK
Support
LINK
End Cap Alignment
Support
12
Camera boxes
Single side, double side, diagonal, Z cameras
13
LED holder (fork)
14
Electronics (MAB and LEDs)
Control room
Ethernet
CAN
MAB
Chamber
Slow control for barrel muon chambers
Board computer
CAN
Barrel muon chamber slow control unit
I2C
Temperature Sensors (4 to 16)
MAB - LEDs (0 to 20)
Z bar - LEDs (0 to 4)
Cameras (9 to 12)
4 LED holders (lt20 LED-s/holder)
CAN Standard proposed by CERN I2C
Standard chosen by the barrel muon group
15
Software
A software called SIMULGEO has been developed in
order to make easily - simulation, error
propagation studies - reconstruction of the
geometrical position The opto-geometrical system
is described thanks to a special language. (CMS
NOTE 1998/079 ) Will be integrated with the ORCA
software (reconstruction).
16
Third part plans
17
Main directions

• MAB final design and start of the market survey.
• Optical components final design.
• Design and tests of the prototypes (camera
  boxes, forks).
• Electronics (Camera readout, LED control).
• Software (image processing, geometry,
  Calibration DB)
• Design of the calibration benches

18
MAB requirements
Precision requirements for the alignment
MAB requirements (sigma)
Simulations with SIMULGEO
Link performance
Camera performance (lab)
Loads to take into account gravity,
temperature, humidity
19
Test laboratory
20
Test program
21
First test results
22
First test results
23
Project schedule (global view)
D design P production M mounting C
calibration I installation