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