TB Peter Glässel, Heidelberg1 TPC Progress

TB Peter Glässel, Heidelberg2 Outline / Summary Gas system: 2 ppm O 2 Exact CO 2 -fraction still unknown to ~0.5%, under investigation with new gas chromatograph cell that separates the three components

TB Peter Glässel, Heidelberg3 Summary continued ROC commissioning: ¼ done Leak problem with leakless cooling system of FEE, fixed 4 to 3 days per 2 sectors No chamber with serious defects found Damaged cables, bad capacitor Some small issues yet to be understood Gathered data are archived Zero-suppression operational Offline Commissioning with test data Calibration issues under study

TB Peter Glässel, Heidelberg4 Summary continued Laser system Autotracker mode operational Central electrode signals seen with laser DAQ: closer to final configuration Signal splitting for HLT works in principle, still in debugging phase of HLT branch Preparations for moving to pit ongoing, detailed report in Sept TB

TB Peter Glässel, Heidelberg5 Improvements on water cooling of FEE Easier, safer connections at manifold in/out Proven procedure for changing sectors Clean water Pressure gauges at FEE in/out Flow meters in both branches Flow can be controlled by bypass Optimized alarm settings and timing Test: no leakage if a silicon hose is disconnected

TB Peter Glässel, Heidelberg6 A-side done 1/2 RCU’s are produced ‘just in time’

TB Peter Glässel, Heidelberg7 Gain uniformity, OROC 50% change of pad size

TB Peter Glässel, Heidelberg8 Gain IROC Target value: ch 30 Requires gas gain ~10000 (in IROC)

TB Peter Glässel, Heidelberg9 Gain spikes in OROC 4 Seem to diminish with time Anodes with poor contact, leading to neighbors with higher gain? Under further investigation (today) 4 weeks later

TB Peter Glässel, Heidelberg10 Gate closure Tested with high amplitude laser tracks (laser intensity x4) and higher gas gain At extreme values, gate leakage barely visible (gate 90 V) Quantitative interpretation difficult (laser non-linear), but order In OROC 13, gate has a leak Probably one floating wire (of ~900) still under study

TB Peter Glässel, Heidelberg11 DAQ Setup for TPC Commissioning ( ) TDS LDC GbE Switch (HP) LDC 6x DRORC PX24/CR2 PC TPC monitoring HLT-LDC 1x DRORC PX24/CR1 RCU SIU SXL2 GDC Server: DAQ, ECS, MySQL, MOOD Gateway aldaqtds03 2x 1.4 TB RAID5+spare, XFS RCU SIU 6x DDG 1x DRORC Server: SLC3,DHCP, DNS,… pcald25 /local (134GB) aldaqds00 1 aldaqds00 2 /mdlocal aldaqpc00 1 aldaqpc01 3 aldaqpc01 0 aldaqpc01 2 aldaqpc01 1 SLC Castor DATE 5.19 MySQL MOOD ECS MB/s (to be upgraded) /tds GDC mStream aldaqpc00 2 aldaqcon0 3 /tds1 alicedaq / LikeOps LTU TTCvi, TTCex lnxpool1 3 TTC GbE Switch GPN HLT Farm — Sector1 —— Sector2 — 502 rcu / rcu123

TB Peter Glässel, Heidelberg12 TPC further schedule Commissioning of ROCs scheduled till Move to UX2 scheduled mid Oct

TB Peter Glässel, Heidelberg13 -- Spares --

TB Peter Glässel, Heidelberg14 3D view of single track

TB Peter Glässel, Heidelberg15 First tracks in the TPC, projection view isolated trackcosmic shower