1. T1 status (a selection from EDR presentations)
Enrico Robutti
I.N.F.N. Genova
TOTEM T1 Collaboration Meeting
CERN, March 8, 2006

2. Chamber mechanics and support structure (S. Cuneo)

3. T1 CSCs MECHANIC DESIGN (1)
LAYOUT OPTIMISATION YIELD TO CSCs OF 10 DIFFERENT GEOMETRY
ALL DETAILED MECHANICAL DRAWINGS FOR CONSTRUCTION (> 100!) ARE AVAILABLE ON EDMS SINCE NOV. ’04. NEXT, FINAL RELEASE, WITH LAST CHANGES SUGGESTED BY PNPI IMPLEMENTED, WILL BE ISSUED SOON
COMPOSITE, GLUED CONSTRUCTION: 2 SANDWICH PANEL (NOMEX CORE + PCB SKINS), ONE CARRIES THE WIRES, THE OTHER THE GAS CONTAINEMENT FRAME (SEE EXPLODED VIEW)
SEVERAL PROTOTYPES HAVE ALREADY BEEN ASSEMBLED AT INFN-GE (PANEL FLATNESS mm) AND OPERATED ON CERN TEST BEAM
TOTEM Collaboration Meeting, March 8, 2005

4. DRILLING TOOL DESIGN, CONSTRUCTION AND TEST
DOWEL PIN HOLES MUST BE MACHINED ON CMS OUTERMOST YOKE RINGS ONCE THE TRUSS HAS BEEN ALIGNED
GIVEN THE INTEGRATION SCENARIO, A SPECIAL TOOL IS REQUIRED TO POSITION APPROPRIATELY THE DRILLING MACHINE
A SORT OF CART, THAT SLIDES ALONG TRUSS RAILS, HAS BEEN DESIGNED, ASSEMBLED AND SUCCESFULLY USED DURING TRUSS QUALIFICATION TESTS
DETAILED DRAWINGS ARE AVAILABLE ON EDMS ID /814/829/832/833/835
TOTEM Collaboration Meeting, March 8, 2005

5. MOCK-UP DESIGN, CONSTRUCTION AND TEST
A HALF T1 TELESCOPE MOCK-UP HAS BEEN DESIGNED, IN ORDER TO REPRODUCE THE SAME EXPECTED MOMENTA AND FORCES DISTRIBUTION OF THE ACTUAL HALF TELESCOPE
DETAILED DRAWINGS ARE AVAILABLE ON EDMS ID /82/83/84
THE ITEM HAS BEEN ASSEMBLED AT CERN AND USED DURING TRUSS QUALIFICATION TESTS
AFTER LAST DETECTOR MASS ESTIMATE, MOCK-UP MASS (290 kg) IS 1.5 TIMES DETECTOR MASS
TOTEM Collaboration Meeting, March 8, 2005

6. T1 SUPPORTING TRUSS QUALIFICATION (1)
THE TRUSS HAS BEEN ANCHORED TO CONCRETE BLOCKS WITH PURPOSE-DESIGNED INTERFACE PLATES, TRYING TO REPRODUCE ACTUAL FINAL INSTALLATION CONDITION
THEN IT HAS FIRST BEEN SUBMITTED TO A 800 kg LOAD (NEARLY TWICE LAST DETECTOR MASS ESTIMATE) POSITIONED ON THE SYSTEM CENTER OF GRAVITY
THEN, C. OF G. LOAD HAS BEEN REMOVED AND HALF T1 LOAD MOCK-UP (290 kg – 1.5 TIMES HALF DETECTOR) HAS BEEN INTRODUCED
QUALIFICATION TESTS ALLOWED ALSO TO PRACTICE WITH LIFTING AND DRILLING TOOLS, AND START THE STUDY OF AN INTEGRATION PROCEDURE TO BE CHECKED DURING CMS INTEGRATION TEST FORESEEN BY THE END OF MARCH 2006
BUT, UNFORTUNATELY, THE MEASUREMENTS DONE BY CMS SURVEY GROUP SHOWED DEFLECTIONS MUCH LARGER THAN EXPECTED
A FIRST PROBLEM HAD BEEN IDENTIFIED IN THE UNCONTROLLED MOTION OF THE CONCRETE BLOCKS
A SECOND LOAD TEST, WITH THE BLOCKS BETTER LEVELLED, SHOWED SMALLER BUT STILL TOO LARGE MOTION OF THE TRUSS
TOTEM Collaboration Meeting, March 8, 2005

7. T1 SUPPORTING TRUSS QUALIFICATION (2)
ACTUAL TRUSS WOULD ALLOW T1 TO DEFLECT RADIALLY TOWARDS THE BEAM PIPE BY 5.2 mm (1.5 mm EXPECTED)
THE EXPECTED FURTHER MASS REDUCTION OF T1, DUE TO THE USE OF FIBRE OPRTICS INSTEAD OF COPPER, WOULD LIMIT THAT VALUE TO 3.8 mm
FURTHER INVESTIGATION IS ONGOING AT INFN GENOVA
A KNOWN LOAD HAS BEEN APPLIED TO THE STRUCTURE, AND DEFLECTIONS HAVE BEEN MEASURED ALONG IT WITH A MICROMETER
AN IMPORTANT DISCREPANCY BETWEEN THEORICAL (0.30 mm) AND MEASURED (2.4 mm) DEFLECTIONS HAS BEEN CONFIRMED
COARSE MEASUREMENTS ALLOWED TO IDENTIFY THE PROBLEM IN THE REGION AROUND THE CONSTRAINTS, THAT SEEMS NOT TO WORK PROPERLY
A SOLUTION TO IMPROVE THE CONSTRAINT IS UNDER STUDY
TOTEM Collaboration Meeting, March 8, 2005

8. Chamber production at PNPI (A. Krivchitch)

9. General technology chain of the TOTEM CSC manufacturing at PNPI
Building No.66A
Storing
Input quality control
Gluing
Set of components for each of CSC
Data base
CSC storing
CSC package
CSC components delivery from Italy through CERN
at PNPI
Building No.2
Anode wiring
CSC assembling
CSC test No.1
CSC test No.2
Data base
CSC shipping
from PNPI at CERN
TOTEM Collaboration Meeting, March 8, 2005

10. Quality Control Procedures
QC after CSC assembling at PNPI
Test station No.1
Test station No.2
QC procedures during CSC manufacturing
Input QC
procedures
QC after CSC transportation
at CERN
Test station No.3
TOTEM Collaboration Meeting, March 8, 2005

11. Sensor network integrity
Test station No.1
Measure sensor connectivity (should be measured on anode and cathode sides).
To measure anode wire connectivity send test pulse to the cathode strip and check response of the test pulses at the anode terminals.
To measure cathode strip connectivity send test pulse to the anode wire and check response of the test pulses at the cathode terminals.
Apparatus: Pulse generator (~15ns rise time, ~1s pulse width, >1V amplitude). Oscilloscope.
Sensor network integrity
Check sensor capacitance both anode and cathode (the capacitance value and tolerance should be set).
Apparatus: Capacitance measuring tool (manual or automated).
TOTEM Collaboration Meeting, March 8, 2005

12. Current and counting rates measurements.
Fill the chamber with real gas mixture.
Measure via high voltage:
- dark current and counting rate;
- current and counting rate with source.
Apparatus: Nanoamperemeter. Set of readout electronics (32 channels) for anode and cathode.
Test station No.2
Measure gas gain uniformity.
Fill the chamber with real gas mixture.
Apply normal value of HV.
Put radioactive source (caesium-137) at the special selected points.
Measure collected charge (current) at the anode outputs at each point.
Apparatus: Nanoamperemeter.
      
TOTEM Collaboration Meeting, March 8, 2005

13. Test station No.3 (at CERN)
Cosmic tests ?
Check grounding and shielding quality.
Assemble all front-end electronics, connect read out electronics. Set thresholds voltages for working value. Start readout run (no HV applied). The noise count should not exceed threshold.
Apparatus: complete set of real electronics, DAQ test version.
Check of CSC parameters after its transportation at CERN
Re-measure all CSC parameters obtained at PNPI
TOTEM Collaboration Meeting, March 8, 2005

14. Electronics (S. Minutoli)

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28. Schedule

29. TOTEM Collaboration Meeting, March 8, 2005
Chamber production
Jan 06
Feb 06
Mar 06
Apr 06
May 06
Jun 06
Jul 06
Aug 06
Sep 06
Oct 06
Nov 06
Dec 06
Jan 07
Feb 07
Mar 07
Apr 07
May 07
Jun 07
tool design
material procurement
input control
pre-production
test of pre-production
full production
TOTEM Collaboration Meeting, March 8, 2005

30. TOTEM Collaboration Meeting, March 8, 2005
Electronics
Jan 06
Feb 06
Mar 06
Apr 06
May 06
Jun 06
Jul 06
Aug 06
AFEC design
AFEC prototype
CFEC design
CFEC prototype
ROC design
ROC prototype
TOTEM Collaboration Meeting, March 8, 2005