alice tpc status, meeting with lhcc referees 30.6.031 alice tpc – status report project leader:...
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ALICE TPC Status, Meeting with LHCC referees 30.6.03 1
ALICE TPC – Status Report
Project leader: Peter Braun-Munzinger, GSI DarmstadtDeputy project leader: Johanna Stachel, HeidelbergTechnical coordinator: Peter Glässel, Heidelberg
Bergen D. Röhrich Data acquisitionBratislava B. Sitar 1/2 IROC series productionCERN T. Meyer Field cageCERN L. Musa ElectronicsCopenhagen B.S. Nielsen Laser systemKrakow M. Kowalski SimulationsDarmstadt GSI H.R. Schmidt ROC engineering, prototyping,
series production, simulationsDarmstadt TU H. Oeschler Electronics testingFrankfurt R. Renfordt Electronics testing, installationHeidelberg KIP V. Lindenstruth Data acquisition, HLTHeidelberg PI J. Stachel Electronics, engineering,
IROC production, OROC productionLund H.A. Gustafsson Electronics
ALICE TPC Status, Meeting with LHCC referees 30.6.03 2
Outline
Field cageReadout chambersLaser systemCooling systemGas system
Readout electronics Schedule
ALICE TPC Status, Meeting with LHCC referees 30.6.03 3
TPC Field Cage Overview
Inner and outer Isolation vesselsAluminum End Plates housing ROC’sField defining system: strips supported by rods
ALICE TPC Status, Meeting with LHCC referees 30.6.03 4
Field Cage Parts, Overview
5560
5000
Drift volume
Isolation volume
Isolation volume
End
whe
el
Central membrane
OCV
OFV
IFV
Central drumcone ICV
ALICE TPC Status, Meeting with LHCC referees 30.6.03 5
Field Cage: Mounting Rod Supports
ALICE TPC Status, Meeting with LHCC referees 30.6.03 6
Field Cage: Rod Assembly
ALICE TPC Status, Meeting with LHCC referees 30.6.03 7
Resistor Rod status
Completed:Gas-cooled prototype
Contacts okStill a few improvements neededRather complicated to produceNeeds separate CO2 gas system
Water-cooled prototypeFull prototype end July03
HV tests both successfulResistor tests: stability, overvoltage tolerance
Water-cooled rod preferred solution
In progress:Tooling and pieces for production (water cooled)
Concerns:Tight schedule (first 2 rods needed Dec03), manpower
ALICE TPC Status, Meeting with LHCC referees 30.6.03 8
Resistor Rod Cooling
gas cooled
water cooledHigh-resistivity water
10G10 Separator
Resistor
Cu-heat bridges
Ceramic pipe Resistor
insulation volume (gas)
gnd 100 kV
ALICE TPC Status, Meeting with LHCC referees 30.6.03 9
Field Cage Inner Drum
Delivered by FischerAl strips (ground) prepared
ALICE TPC Status, Meeting with LHCC referees 30.6.03 10
The Inner FC vessel is being rebuilt
What happened:Leak test: 25 Feb03 --> leaks at glue joint
between composite and flangeUltrasonic test: 27 Feb03 --> faulty glue bondsFirst repair by Fischer: 10-14 Mar03,
only on outer joint Decision to rebuild: 24 Apr03, order 6 May03
Consequences:Repeat work:
Assembly at CERN Jul03Leak test, guard rings, vias, Resistor chain, rod supports
Total delay 7 months, Ready to install rods Dec03Complete FC equipment Jul04 Defective vessel
ALICE TPC Status, Meeting with LHCC referees 30.6.03 11
Impact of FC Schedule on Pre-Installation
7 months
3 m
onth
flo
at
Pre-commissioning of TPC shortened from 13 to 6 month
ALICE TPC Status, Meeting with LHCC referees 30.6.03 12
Field Cage: Central Electrode
ALICE TPC Status, Meeting with LHCC referees 30.6.03 13
Field Cage: Central Electrode
Completed:Modification of stretching machineStock of 6m wide glued mylar foilStretching and rupture testelectrode frames and manipulation tool
Not started yet:Production of 3 electrodes (not earlier than needed)
ALICE TPC Status, Meeting with LHCC referees 30.6.03 14
Field Cage Status Summary
Completed:Mounting rod supports on OFVInner conesCentral drum
In progress:Gluing standard rodsGluing laser rods
Not started yet:Rebuild of IFV (assembly at CERN Jul03)Testing and equipment of new IFVLoad test on outer insulation volumeRebuild of one inner cone (change of dimensions at muon absorber)
ALICE TPC Status, Meeting with LHCC referees 30.6.03 15
Service Support Wheel
Completed:
Design of frame and servicesPrototype sectors for FEE assembly trial
In progress:Construction Design of details for connection to ITS services and beam pipe
Concerns: Installation of FEC’s difficult, tight space
Carries FEE and services
ALICE TPC Status, Meeting with LHCC referees 30.6.03 16
Front End Card Installation
FEC in Cu sandwich
6 cables per FECconnectors with locks
Model setup at GSI to study FEE installation
development of tool for cable insertion, connector locking/ unlocking
IROC
ALICE TPC Status, Meeting with LHCC referees 30.6.03 17
IROC Production Bratislava
Quality good Very uniform wire spacingVery uniform wire tension
Leak and gain tests lagging behind due to (trivial) technical problems, mostly solved alreadyProduction running smoothly now at 2 ch/month
not on critical path
ALICE TPC Status, Meeting with LHCC referees 30.6.03 18
OROC Production Heidelberg/GSI
Initial problems with segmented pad planes solved, but still more difficult than anticipated
(2 padplanes out of 14 have to be redone)Leak rate lower per area than IROCEach chamber is surveyed, geometry within specs
Production running at 1 ch/week now
ALICE TPC Status, Meeting with LHCC referees 30.6.03 19
OROC Production Heidelberg/GSI
Survey of planarity andpad geometry
ALICE TPC Status, Meeting with LHCC referees 30.6.03 20
OROC Production Heidelberg/GSICoarse and fine adjustment of a wire plane
ALICE TPC Status, Meeting with LHCC referees 30.6.03 21
OROC Production Heidelberg/GSI
Measuringwire tension
ALICE TPC Status, Meeting with LHCC referees 30.6.03 22
OROC Production Heidelberg/GSI
Chamber in test setup
ALICE TPC Status, Meeting with LHCC referees 30.6.03 23
ROC Status Summary
Completed:Assembled: IROC 27, OROC 12Tested: IROC 18, OROC 5
In progress:Production rates: OROC 1 ch/week,
IROC 2 ch/moExpect to finish early 2004
Concerns:OROC: gluing of pad plane (4 sectors) more difficult than anticipatedTesting in Bratislava not yet fully operational
ALICE TPC Status, Meeting with LHCC referees 30.6.03 24
Laser System
Completed:Micro-mirrors: delivered, tested and selectedPreparation of laser rod segments and mirror holdersTooling for gluing rods
In progress: Assembly of laser rods (till Sep03)Procurement/construction of optics elements
Concerns: none
ALICE TPC Status, Meeting with LHCC referees 30.6.03 25
Electronics Cooling
27 kW to be removedSystem design nearly completed, draft document existsPRR in fall
FEE cooling
ROC padplane thermal screen
ALICE TPC Status, Meeting with LHCC referees 30.6.03 26
TPC Gas System
In progress:System for drift gas Ne/CO2 (90/10)
Construction nearly finished, commissioning till Dec03Connection to pre-installation site SXL2 (existing lines)
Not yet started:CO2 for insulation volumes: still to be done
very simple in case of water cooled resistor rod
Concerns: none
ALICE TPC Status, Meeting with LHCC referees 30.6.03 27
TPC PASA
Final submission 27 May03engineering sample 500 chips Sep03rest of production (40,000 chips) Jan04, testing Feb-Jul04
* typical 12 pF, slope 16.5 e/pF
*
ALICE TPC Status, Meeting with LHCC referees 30.6.03 28
High Occupancy events from Cosmics
ALICE TPC Status, Meeting with LHCC referees 30.6.03 29
ALTRO digital tail cancellation and baseline restoration
PG:PG:
ALICE TPC Status, Meeting with LHCC referees 30.6.03 30
Front-end Card final version
128 ch
ALICE TPC Status, Meeting with LHCC referees 30.6.03 31
Front-end Card Status
Completed:Improved features
EEPROM card idImproved Front-end Bus design: multilayer-flexible instead of cableGeographical address
Assembly of prototypeStandalone tests
In progress:Adaptation of cooling platesCharacterization with ROCTest equipment
Production of 4500 FEC Nov03-Aug04, test Apr04-Nov04
Concerns: tight schedule
ALICE TPC Status, Meeting with LHCC referees 30.6.03 32
Readout Control Unit (RCU)
Completed:Production of prototype RCU-2 (small series for test setups)
PCI-card, problems to get them to work reliablyFinal design (standalone RCU): motherboard layout done
In progress:Solve RCU-2 problem (fall-back RCU-1, decision Jul03)Final design (standalone):
DCS/Trigger cards (common for TPC/TRD) under testFPGA firmware till end Aug03System tests from Sep03
Not started yet:Production (216 cards + spares) Apr04 - Jul04Testing Aug04 - Mar05
Concerns: tight schedule
ALICE TPC Status, Meeting with LHCC referees 30.6.03 33
Schedule Overview
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