tb 20.7.06 peter glässel, heidelberg1 tpc progress
Post on 03-Jan-2016
224 Views
Preview:
TRANSCRIPT
TB 20.7.06 Peter Glässel, Heidelberg 1
TPC Progress
TB 20.7.06 Peter Glässel, Heidelberg 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
TB 20.7.06 Peter Glässel, Heidelberg 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
OfflineCommissioning with test data
Calibration issues under study
TB 20.7.06 Peter Glässel, Heidelberg 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
TB 20.7.06 Peter Glässel, Heidelberg 5
Improvements on water cooling of FEE
Easier, safer connections at manifold in/outProven procedure for changing sectorsClean waterPressure gauges at FEE in/outFlow meters in both branchesFlow can be controlled by bypassOptimized alarm settings and timingTest: no leakage if a silicon hose is disconnected
TB 20.7.06 Peter Glässel, Heidelberg 6
A-side done 1/2
RCU’s are produced ‘just in time’
TB 20.7.06 Peter Glässel, Heidelberg 7
Gain uniformity, OROC
50% change of pad size
TB 20.7.06 Peter Glässel, Heidelberg 8
Gain IROC
Target value: ch 30
Requires gas gain ~10000 (in IROC)
TB 20.7.06 Peter Glässel, Heidelberg 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
TB 20.7.06 Peter Glässel, Heidelberg 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
TB 20.7.06 Peter Glässel, Heidelberg 11
DAQ Setup for TPC Commissioning (11.7.06)
TDS
LDC
GbE Switch (HP)
LDC6x DRORC 6x DRORC
PX24/CR2
PCTPC monitoring
HLT-LDC1x DRORC
PX24/CR1
RCUSIU
SXL2
GDC Server:DAQ, ECS,
MySQL, MOODGateway
aldaqtds032x 1.4 TB RAID5+spare, XFS
RCUSIU
6x 6x
DDG1x DRORC
Server:SLC3,DHCP,
DNS,…
pcald25/local (134GB)
aldaqds001
aldaqds002
/mdlocal
aldaqpc001
aldaqpc013
aldaqpc010
aldaqpc012
aldaqpc011
SLC 3.0.6Castor 2.1.0-2DATE 5.19MySQL 5.0.21-1MOOD 5.0.0.1ECS 2.8
100 MB/s (to be upgraded)
409408512517513509
404504407503508506
/tds1
514
GDCmStream
aldaqpc002
aldaqcon03
/tds
1
alicedaq / LikeOps
LTUTTCvi, TTCex
lnxpool13TT
C
GbE Switch
GPN
HLT Farm
— Sector1 —
— Sector2 —
502
rcu / rcu123
TB 20.7.06 Peter Glässel, Heidelberg 12
TPC further schedule
Commissioning of ROCs scheduled till 12.10.06
Move to UX2 scheduled mid Oct
TB 20.7.06 Peter Glässel, Heidelberg 13
-- Spares --
TB 20.7.06 Peter Glässel, Heidelberg 14
3D view of single track
TB 20.7.06 Peter Glässel, Heidelberg 15
First tracks in the TPC, projection view
isolated track cosmic shower
top related