1. Technical FORUM, 16.3.06 Peter Glässel, Heidelberg1 TPC Progress Project leader: Peter Braun-Munzinger, GSI Darmstadt Deputy project leader: Johanna Stachel, Heidelberg Technical coordinator: Peter Glässel, Heidelberg

2. Technical FORUM, 16.3.06 Peter Glässel, Heidelberg2 Outline Survey of end plates, I-bar story Leak tests Service Support Wheels (SSW) Installation of Front End Electronics Laser system Cooling system Gas system Planning, Summary

3. Technical FORUM, 16.3.06 Peter Glässel, Heidelberg3 Status at last FORUM ROC mounting completed end Sept 05 Survey of end plate and ROCs: End plate conical by 2.6 mm Force needed to straighten: about 6000 N

4. Technical FORUM, 16.3.06 Peter Glässel, Heidelberg4 Straightening the end plate Decision to use 2 I-bars Force needed for flat end plate: F= 2 x 2600 N Integration problems with ITS solved (installation situation actually improved for ITS) 2 nd set of I-bars needed to allow changing between A and C-side (never again allow the endplate to go to its conical shape) 2 nd set already delivered

5. Technical FORUM, 16.3.06 Peter Glässel, Heidelberg5 Precision Shimming of the ROCs Steps: survey take out shims machine to correct length reinsert shims Overall precision: 200 μm end plate ROC body Mounting point, shim removed

6. Technical FORUM, 16.3.06 Peter Glässel, Heidelberg6 Survey result of ROCs, A-side

7. Technical FORUM, 16.3.06 Peter Glässel, Heidelberg7 Survey, C-side peak-to-peak ± 200 μm rms < 100 μm one outlier each side

8. Technical FORUM, 16.3.06 Peter Glässel, Heidelberg8 After mounting ROCs Sealing chambers Leak test He-sniffing One OROC and one seal exchanged Argon test End plate ROC Sealing foil Sealing bar

9. Technical FORUM, 16.3.06 Peter Glässel, Heidelberg9 Argon test Flow 2.6 m 3 /h 4x less than with final system → 4x more sensitive 11 ppm O 2 reached 24.2.06, still not asymptotic extrapolated < 3 ppm for final flow

10. Technical FORUM, 16.3.06 Peter Glässel, Heidelberg10 A-side ROCs completed

11. Technical FORUM, 16.3.06 Peter Glässel, Heidelberg11 Laser system optics and mechanics Safety tube Most components installed on end plate Alignment and start-up Apr 06

12. Technical FORUM, 16.3.06 Peter Glässel, Heidelberg12 Service Support Wheels (SSW) Used ‘bare’ in ITS-TPC integration test Services partially preinstalled LV bus bars delayed due to quality problem, problem solved by now Mounted on Delphi frame rail at end plates Load FEC frames to simulate FEC weight (1.1 t each side) Alignment of FEC frames to ROCs Deformation of wheel < 0.1 mm

13. Technical FORUM, 16.3.06 Peter Glässel, Heidelberg13 SSW sector prototype

14. Technical FORUM, 16.3.06 Peter Glässel, Heidelberg14 Service Support Wheels unequipped SSW for integration test equipped with cooling + FEC frames

15. Technical FORUM, 16.3.06 Peter Glässel, Heidelberg15 SSW installation A-side

16. Technical FORUM, 16.3.06 Peter Glässel, Heidelberg16 SSW C-side

17. Technical FORUM, 16.3.06 Peter Glässel, Heidelberg17 SSW loaded

18. Technical FORUM, 16.3.06 Peter Glässel, Heidelberg18  Measurement of VCC A, VCC D, I A, I D and T Test of all CSRs, Control & Readout path FE Cards Installation 2/2  Readout of trigger related data (pulser) Connection to the pad plane During the installation, the FECs are tested individually (stand-alone) by means of a dedicated “mounting test tool”, U2F (USB to FEC interface) U2F Card FEE installation

19. Technical FORUM, 16.3.06 Peter Glässel, Heidelberg19 TPC A Side (17 th February ’06) The FEE installation team

20. Technical FORUM, 16.3.06 Peter Glässel, Heidelberg20 FEE installation highlights

21. Technical FORUM, 16.3.06 Peter Glässel, Heidelberg21 Sector A09 equipped with backplanes cooling circuit LV power rods LV PS + cables (4 x 40m) FEE Test Sector A09

22. Technical FORUM, 16.3.06 Peter Glässel, Heidelberg22 sum of charges sum of charges, pad row 46 baseline noise rms (ADC counts) Characterization of Sector A09 - IROC Test sector IROC results, preliminary

23. Technical FORUM, 16.3.06 Peter Glässel, Heidelberg23 sum of samples baseline rms Characterization of Sector A09 - IROC baseline Test sector IROC results, preliminary

24. Technical FORUM, 16.3.06 Peter Glässel, Heidelberg24 sum of chargessum of charges, pad row 11 Characterization of Sector A09 - OROC baseline noise rms (ADC counts) Test sector OROC results, preliminary

25. Technical FORUM, 16.3.06 Peter Glässel, Heidelberg25 sum of samples Characterization of Sector A09 - OROC baseline rms sum of samples Test sector OROC results, preliminary

26. Technical FORUM, 16.3.06 Peter Glässel, Heidelberg26 Conclusion from Test Sector Results Noise and electronic gain uniformity equal our most optimistic expectations!

27. Technical FORUM, 16.3.06 Peter Glässel, Heidelberg27 Cooling: Heat screens Inner thermal screen installed, shields from ITS services Reminder: no screen towards ITS Outer thermal screen: Decision for active screen Design completed, 1% X o : fixed to SF from TPC side Offer received Install July/Aug 06, if possible earlier

28. Technical FORUM, 16.3.06 Peter Glässel, Heidelberg28 Gas system Previously commissioned with dummy volumes Start pre-commissioning with TPC in SXL2 with final gas mixture in a week Control Backup Mixer Purifier CO2 Distr Analys Pump

29. Technical FORUM, 16.3.06 Peter Glässel, Heidelberg29 Pre-Commissioning plans, SLXL2 Commissioning of gas system from 20.3. to ~19.4. Commissioning of Field cage, FEE and ROCs DCS system Drift HV Laser ROC HV Gating Readout chain Trigger for cosmics, laser Online monitoring Verify each sector, at least with laser tracks Tracks (laser, cosmics) with 2 sectors (joining, opposite, …) Commissioning of temperature sensors Move to UX25: 4.9.06

30. Technical FORUM, 16.3.06 Peter Glässel, Heidelberg30 TPC Summary Survey: I-bar and Shimming ROC Leak tests FEE installation phase till mid Mar 06 5 ½ months pre-commissioning TPC installation in UX2 Sep 06

31. Technical FORUM, 16.3.06 Peter Glässel, Heidelberg31 -- Spares --

32. Technical FORUM, 16.3.06 Peter Glässel, Heidelberg32 TPC with 2 I-bars During ITS installation, I-bars will be on A-side

33. Technical FORUM, 16.3.06 Peter Glässel, Heidelberg33 The Gain Variation Story IROC 1 IROC 5 Problem traced to pad/anode distance variations of IROC 1 Installed chambers are within specs

34. Technical FORUM, 16.3.06 Peter Glässel, Heidelberg34 Service Support Wheels (SSW) Installation of services into SSW started mid Sep05 Quality problem detected: LV bus bars: some LV connectors damaged by flux residues and/or excessive temperature Repair at company failed, connectors can’t be trusted anymore New production, will bring completion of SSW to Jan or even Feb06 Partial recovery of schedule due to the possibility to install LV bus bars after FEE cards, would allow start of FEE installation on one side already late December, almost like foreseen previously

35. Technical FORUM, 16.3.06 Peter Glässel, Heidelberg35 Temporary I-bar

36. Technical FORUM, 16.3.06 Peter Glässel, Heidelberg36 C-side: loaded SSW