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ALICE CR07: Installation and Commissioning

ALICE CR07: Installation and Commissioning. Paul Dauncey Material from: L. Leistam: “ALICE Status” W. Riegler: “Commissioning and Installation” K. Safarik: “Strategy for Data-Taking, Alignment and Calibration”. Installation: Recent Progress. Major milestones recently achieved

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ALICE CR07: Installation and Commissioning

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  1. ALICE CR07: Installation and Commissioning Paul Dauncey Material from: L. Leistam: “ALICE Status” W. Riegler: “Commissioning and Installation” K. Safarik: “Strategy for Data-Taking, Alignment and Calibration” ALICE - Paul Dauncey

  2. Installation: Recent Progress • Major milestones recently achieved • SSD and SDD mounted on ITS frame • ITS frame lowered into pit and inserted into TPC • Be beam pipe passed through and connected to absorber • Current status • Beampipe now in bake-out • Bake-out period shortened • From 26 to 17 days • Assumes no leaks will be found ALICE - Paul Dauncey

  3. W. Riegler Integration: Constraints NOW ALICE - Paul Dauncey

  4. Installation: Comments • Installation in series means every detector is on the critical path • Every delay counts against the overall ready date • Delays have built up over the last year • TPC was taken into pit in Mar 2006 • Ready for ITS on 1 Feb; at CR06 this was 1 Oct • ITS was actually installed on 15 Mar • ITS delay due to SDD tests; cannot be fixed once installed • Roughly 5 months delay since CR06, 1 month since Jan LHCC • “Luckily”, LHC schedule delayed by 4 months since CR06 • Rest of delay compensated by breaking strict ordering for A-side forward detectors • Very little contingency left for planned detector • Would need to move to nights and/or weekends • Or not install some components ALICE - Paul Dauncey

  5. Installation: C-side Forward Detectors • V0, T0: 10-17 Apr • FMD3: 18-26 Apr • All thee detectors are ready for installation • Procedure tested in full in 2005; confident of this step ALICE - Paul Dauncey

  6. Installation: SPD, connection to ITS • SPD: 27 Apr – 2 May • Connections: 3-9 May • Most difficult part; pixel detector needs to be on time ALICE - Paul Dauncey

  7. Installation: Services, FMD, beampipe • FMD2: 8-11 May • Services: 14 May – 7 Jun • TPC movement: 8-13 Jun • Beampipe: 14-21 Jun ALICE - Paul Dauncey

  8. Installation: PHOS, EMCAL • PHOS, one module: 22-25 Jun • EMCAL support: 26 Jun – 2 Jul ALICE - Paul Dauncey

  9. Installation: TOF, TRD • TOF, TRD modules 3-30 Jul • Adds extra modules to existing installation • Realistically is contingency • End date won’t change even if start date is later ALICE - Paul Dauncey

  10. Installation: Miniframe • Miniframe: 31 Jul - 5 Sep • Critical milestone: carries services for almost all A-sides • No installed detectors can read out on A-side until miniframe is in place • LHC vacuum closes after installation; no time to fix anything • Schedule Review in Sep recommended bringing this forward • At the expense of installation of other detectors • This recommendation was not taken up ALICE - Paul Dauncey

  11. Installation: A-side Forward Det, Shielding • V0, T0, FMD, PMD: 6-25 Sep • Shielding: 26 Sep – 9 Oct • A-side forward detectors pushed after beampipe closure to make schedule; no apparent downside ALICE - Paul Dauncey

  12. Critical: A-sides won’t connect until Sep • Not all services in place yet… • …although scheduled to be by the time the relevant detectors arrive ALICE - Paul Dauncey

  13. L. Leistam ALICE - Paul Dauncey

  14. L. Leistam ALICE - Paul Dauncey

  15. Commissioning: Issues • Services and power supplies • Services are not complete • CAEN power supplies are a “real concern”; still no real progress • Space in the pit • Space is extremely tight for people working on the installation of detectors and services • Miniframe • Effectively a huge patch panel • Planned by subdetectors semi-independently; no overall plan shown ALICE - Paul Dauncey

  16. Estimates 20k events for this K. Safarik ALICE - Paul Dauncey

  17. Commissioning: Cosmics • Cosmics is an essential step before beam data • Only way to be sure all timing, event building, etc, is right • Otherwise, Nov beam will be used for commissioning, not calibration and alignment • Current plan is mainly parasitic running until Oct 10 • Installation continuing • Installed detectors run as-and-when ready • After this, full detector cosmics running can occur • 4 weeks scheduled, roughly half without magnet on, half with magnet on • Alignment requires ~20k cosmic events in SPD • Rate is ~ 1/min; requires ~14 days • Completely fills allotted time • No spare time for actual commissioning of whole detector readout ALICE - Paul Dauncey

  18. Conclusions • Installation: • Very significant progress • Whole schedule at risk from delays from all remaining detectors • Accurate up-to-date knowledge of the LHC schedule is essential • Coordination across subdetectors is good and well managed • Commissioning • Individual subdetectors have done many tests in the lab • Need to increase as centralised activity in the pit • Lack of services, particularly on A-side will be a drawback • Cosmics are a valuable tool but are at risk of being lost as a contingency buffer for any further schedule delays • Recommend appointing a “Cosmics Manager” • To plan the cosmics running in detail (like the CMS MTCC) • To make sure it happens and the data are analysed ALICE - Paul Dauncey

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