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ALICE TPC Status, Meeting with LHCC referees 30.6.031 ALICE TPC – Status Report Project leader: Peter Braun-Munzinger, GSI Darmstadt Deputy project leader:

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Presentation on theme: "ALICE TPC Status, Meeting with LHCC referees 30.6.031 ALICE TPC – Status Report Project leader: Peter Braun-Munzinger, GSI Darmstadt Deputy project leader:"— Presentation transcript:

1 ALICE TPC Status, Meeting with LHCC referees 30.6.031 ALICE TPC – Status Report Project leader: Peter Braun-Munzinger, GSI Darmstadt Deputy project leader: Johanna Stachel, Heidelberg Technical coordinator: Peter Glässel, Heidelberg Bergen D. Röhrich Data acquisition BratislavaB. Sitar 1/2 IROC series production CERN T. Meyer Field cage CERN L. Musa Electronics Copenhagen B.S. Nielsen Laser system KrakowM. Kowalski Simulations Darmstadt GSI H.R. Schmidt ROC engineering, prototyping, series production, simulations Darmstadt TU H. Oeschler Electronics testing Frankfurt R. Renfordt Electronics testing, installation Heidelberg KIP V. Lindenstruth Data acquisition, HLT Heidelberg PIJ. Stachel Electronics, engineering, IROC production, OROC production Lund H.A. Gustafsson Electronics

2 ALICE TPC Status, Meeting with LHCC referees 30.6.032 Outline Field cage Readout chambers Laser system Cooling system Gas system Readout electronics Schedule

3 ALICE TPC Status, Meeting with LHCC referees 30.6.033 TPC Field Cage Overview Inner and outer Isolation vessels Aluminum End Plates housing ROC’s Field defining system: strips supported by rods

4 ALICE TPC Status, Meeting with LHCC referees 30.6.034 Field Cage Parts, Overview 5560 5000 Drift volume Isolation volume End wheel Central membrane OCV OFV IFV Central drum cone ICV

5 ALICE TPC Status, Meeting with LHCC referees 30.6.035 Field Cage: Mounting Rod Supports

6 ALICE TPC Status, Meeting with LHCC referees 30.6.036 Field Cage: Rod Assembly

7 ALICE TPC Status, Meeting with LHCC referees 30.6.037 Resistor Rod status Completed: Gas-cooled prototype Contacts ok Still a few improvements needed Rather complicated to produce Needs separate CO 2 gas system Water-cooled prototype Full prototype end July03 HV tests both successful Resistor 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

8 ALICE TPC Status, Meeting with LHCC referees 30.6.038 Resistor Rod Cooling gas cooled water cooled High-resistivity water 10 G10 Separator Resistor Cu-heat bridges Ceramic pipeResistor insulation volume (gas) gnd100 kV

9 ALICE TPC Status, Meeting with LHCC referees 30.6.039 Field Cage Inner Drum Delivered by Fischer Al strips (ground) prepared

10 ALICE TPC Status, Meeting with LHCC referees 30.6.0310 The Inner FC vessel is being rebuilt What happened: Leak test: 25 Feb03 --> leaks at glue joint between composite and flange Ultrasonic test: 27 Feb03 --> faulty glue bonds First repair by Fischer: 10-14 Mar03, only on outer joint Decision to rebuild: 24 Apr03, order 6 May03 Consequences: Repeat work: Assembly at CERN Jul03 Leak test, guard rings, vias, Resistor chain, rod supports Total delay 7 months, Ready to install rods Dec03 Complete FC equipment Jul04 Defective vessel

11 ALICE TPC Status, Meeting with LHCC referees 30.6.0311 Impact of FC Schedule on Pre-Installation 7 months 3 month float Pre-commissioning of TPC shortened from 13 to 6 month

12 ALICE TPC Status, Meeting with LHCC referees 30.6.0312 Field Cage: Central Electrode

13 ALICE TPC Status, Meeting with LHCC referees 30.6.0313 Field Cage: Central Electrode Completed: Modification of stretching machine Stock of 6m wide glued mylar foil Stretching and rupture test electrode frames and manipulation tool Not started yet: Production of 3 electrodes (not earlier than needed)

14 ALICE TPC Status, Meeting with LHCC referees 30.6.0314 Field Cage Status Summary Completed: Mounting rod supports on OFV Inner cones Central drum In progress: Gluing standard rods Gluing laser rods Not started yet: Rebuild of IFV (assembly at CERN Jul03) Testing and equipment of new IFV Load test on outer insulation volume Rebuild of one inner cone (change of dimensions at muon absorber)

15 ALICE TPC Status, Meeting with LHCC referees 30.6.0315 Service Support Wheel Completed: Design of frame and services Prototype 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

16 ALICE TPC Status, Meeting with LHCC referees 30.6.0316 Front End Card Installation FEC in Cu sandwich 6 cables per FEC connectors with locks Model setup at GSI to study FEE installation development of tool for cable insertion, connector locking/ unlocking IROC

17 ALICE TPC Status, Meeting with LHCC referees 30.6.0317 IROC Production Bratislava Quality good Very uniform wire spacing Very uniform wire tension Leak and gain tests lagging behind due to (trivial) technical problems, mostly solved already Production running smoothly now at 2 ch/month not on critical path

18 ALICE TPC Status, Meeting with LHCC referees 30.6.0318 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 IROC Each chamber is surveyed, geometry within specs Production running at 1 ch/week now

19 ALICE TPC Status, Meeting with LHCC referees 30.6.0319 OROC Production Heidelberg/GSI Survey of planarity and pad geometry

20 ALICE TPC Status, Meeting with LHCC referees 30.6.0320 OROC Production Heidelberg/GSI Coarse and fine adjustment of a wire plane

21 ALICE TPC Status, Meeting with LHCC referees 30.6.0321 OROC Production Heidelberg/GSI Measuring wire tension

22 ALICE TPC Status, Meeting with LHCC referees 30.6.0322 OROC Production Heidelberg/GSI Chamber in test setup

23 ALICE TPC Status, Meeting with LHCC referees 30.6.0323 ROC Status Summary Completed: Assembled: IROC 27, OROC 12 Tested: IROC 18, OROC 5 In progress: Production rates: OROC 1 ch/week, IROC 2 ch/mo Expect to finish early 2004 Concerns: OROC: gluing of pad plane (4 sectors) more difficult than anticipated Testing in Bratislava not yet fully operational

24 ALICE TPC Status, Meeting with LHCC referees 30.6.0324 Laser System Completed: Micro-mirrors: delivered, tested and selected Preparation of laser rod segments and mirror holders Tooling for gluing rods In progress: Assembly of laser rods (till Sep03) Procurement/construction of optics elements Concerns: none

25 ALICE TPC Status, Meeting with LHCC referees 30.6.0325 Electronics Cooling 27 kW to be removed System design nearly completed, draft document exists PRR in fall FEE cooling ROC padplane thermal screen

26 ALICE TPC Status, Meeting with LHCC referees 30.6.0326 TPC Gas System In progress: System for drift gas Ne/CO 2 (90/10) Construction nearly finished, commissioning till Dec03 Connection to pre-installation site SXL2 (existing lines) Not yet started: CO 2 for insulation volumes: still to be done very simple in case of water cooled resistor rod Concerns: none

27 ALICE TPC Status, Meeting with LHCC referees 30.6.0327 TPC PASA Final submission 27 May03 engineering sample 500 chips Sep03 rest of production (40,000 chips) Jan04, testing Feb-Jul04 * typical 12 pF, slope 16.5 e/pF *

28 ALICE TPC Status, Meeting with LHCC referees 30.6.0328 High Occupancy events from Cosmics

29 ALICE TPC Status, Meeting with LHCC referees 30.6.0329 ALTRO digital tail cancellation and baseline restoration PG:

30 ALICE TPC Status, Meeting with LHCC referees 30.6.0330 Front-end Card final version 128 ch

31 ALICE TPC Status, Meeting with LHCC referees 30.6.0331 Front-end Card Status Completed: Improved features EEPROM card id Improved Front-end Bus design: multilayer-flexible instead of cable Geographical address Assembly of prototype Standalone tests In progress: Adaptation of cooling plates Characterization with ROC Test equipment Production of 4500 FEC Nov03-Aug04, test Apr04-Nov04 Concerns: tight schedule

32 ALICE TPC Status, Meeting with LHCC referees 30.6.0332 Readout Control Unit (RCU) Completed: Production of prototype RCU-2 (small series for test setups) PCI-card, problems to get them to work reliably Final 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 test FPGA firmware till end Aug03 System tests from Sep03 Not started yet: Production (216 cards + spares) Apr04 - Jul04 Testing Aug04 - Mar05 Concerns: tight schedule

33 ALICE TPC Status, Meeting with LHCC referees 30.6.0333 Schedule Overview

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