TPC Progress

1
TPC Progress
2
Outline / Summary

• Gas system
• 2 ppm O2
• Exact CO2-fraction still unknown to 0.5, under
  investigation with new gas chromatograph cell
  that separates the three components

3
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

4
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

5
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

6
A-side done 1/2

• RCUs are produced just in time

7
Gain uniformity, OROC

• 50 change of pad size

8
Gain IROC

• Target value ch 30
• Requires gas gain 10000 (in IROC)

9
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
10
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 10-4
• In OROC 13, gate has a leak
• Probably one floating wire (of 900)
• still under study

11
DAQ Setup for TPC Commissioning (11.7.06)
Sector1
Sector2
lnxpool13
aldaqcon03
TTC
RCU
RCU
LTU TTCvi, TTCex
PC TPC monitoring
6x
6x
rcu / rcu123
SIU
SIU
GbE Switch
SXL2
409408512517513509
404504407503508506
PX24/CR2
PX24/CR1
HLT Farm
502
514
6x DRORC
6x DRORC
1x DRORC
1x DRORC
LDC
LDC
HLT-LDC
DDG
GPN
aldaqpc013
aldaqpc010
aldaqpc012
aldaqpc011
502
GbE Switch (HP)
100 MB/s (to be upgraded)
GDC
Server DAQ, ECS,MySQL, MOOD
Gateway
ServerSLC3,DHCP, DNS,
GDCmStream
SLC 3.0.6Castor 2.1.0-2DATE 5.19MySQL
5.0.21-1MOOD 5.0.0.1ECS 2.8
aldaqpc001
aldaqpc002
pcald25 /local (134GB)
aldaqds001
aldaqds002 /mdlocal
/tds1
/tds1
TDS
aldaqtds03 2x 1.4 TB RAID5spare, XFS
alicedaq / LikeOps
12
TPC further schedule

• Commissioning of ROCs scheduled till 12.10.06
• Move to UX2 scheduled mid Oct

13
-- Spares --
14
3D view of single track
15
First tracks in the TPC, projection view
isolated track
cosmic shower