1. TB 19.4.06 Peter Glässel, Heidelberg1 TPC Progress Project leader: Peter Braun-Munzinger, GSI Darmstadt Deputy project leader: Johanna Stachel, Heidelberg Technical coordinator: Peter Glässel, Heidelberg

2. TB 19.4.06 Peter Glässel, Heidelberg2 Main Activities Front End Electronics ‘Dry’ testing of sectors w/o HV started Laser system Shipped today, to arrive 24.4. About 1 week (incl weekend) to install and align A-side Cabling Gas system Accorde Drift HV 100 kV (Heinzinger) installed, test with DCS ELMB pt1000 sensor system: Sensors cabled up 90%

3. TB 19.4.06 Peter Glässel, Heidelberg3 C-Side

4. TB 19.4.06 Peter Glässel, Heidelberg4 Accorde is in place Next: complete cabling, setting up trigger

5. TB 19.4.06 Peter Glässel, Heidelberg5 Gas system Gas commissioning started Re-commissioning complete functionality (after software upgrade) With new gas lines (modifications on plug) and dummy volume Improvements on filling cycle: try to speed up filling cycle by using higher pressure, lower temperature on CO 2 absorber TPC gas lines prepared for switch to gas system Start gas system with TPC end of week, filling next week (expected to take 2 to 3 weeks) → mid May Clean room part of system

6. TB 19.4.06 Peter Glässel, Heidelberg6 TRD/TPC heat screen Design done 0.5 mm Al panels with Al water lines (avg 1% X 0 ) Fixed to SF from TPC side with bolts welded to SF Water manifolds along axial SF beams Bidding ongoing Installation before TRD installation (June)

7. TB 19.4.06 Peter Glässel, Heidelberg7 Summary Commissioning started A lot to do before we see the first tracks

8. TB 19.4.06 Peter Glässel, Heidelberg8 -- Spares –

9. TB 19.4.06 Peter Glässel, Heidelberg9 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

10. TB 19.4.06 Peter Glässel, Heidelberg10 Gas system Previously commissioned with dummy volumes Pre-commissioning with TPC in SXL2 with final gas mixture Control Backup Mixer Purifier CO2 Distr Analys Pump

11. TB 19.4.06 Peter Glässel, Heidelberg11 100 kV system

12. TB 19.4.06 Peter Glässel, Heidelberg12 TPC with 2 I-bars During ITS installation, I-bars will be on A-side