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Shutdown Activities for LHC Beam Vacuum

Shutdown Activities for LHC Beam Vacuum. Ray Veness / AT-VAC. Contents. Status of vacuum in the experiments Schedules for vacuum interventions Beam vacuum issues for the shutdown Update on consolidation activities. Status. Resources 1 vacuum team (Schneider/Calegari) for Ne venting

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Shutdown Activities for LHC Beam Vacuum

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  1. Shutdown Activities for LHC Beam Vacuum Ray Veness / AT-VAC

  2. Contents • Status of vacuum in the experiments • Schedules for vacuum interventions • Beam vacuum issues for the shutdown • Update on consolidation activities Beampipe Shutdown- R.Veness

  3. Status • Resources • 1 vacuum team (Schneider/Calegari) for Ne venting • 1 mechanical team (Lepeule/Kos) for all other activities with support if needed from ‘experts’ • CMS • Vacuum sector vented to ultra-pure Ne on 3/10 • ATLAS • Vacuum sector vented to ultra-pure Ne on 14/10 • Check-out of vacuum instrumentation and re-configuring of supports for opening of the EndcapToroid 24/10 • ALICE • Vacuum sector vented to ultra-pure Ne on 21/10 • 3x RB24 LSS-type vacuum chambers removed 24/10 • LHCb • Venting of the vacuum sector in progress 28/10 Beampipe Shutdown- R.Veness

  4. Schedule for Detector Opening [Data given in week 43] • Comments: • Schedules are not yet stable • The bars do not represent periods of 100% activity for VAC • There is one VAC mechanical intervention team, so conflicts may arise Beampipe Shutdown- R.Veness

  5. Beam Vacuum Issues for the Shutdown • ATLAS minimised ion pumps • Some abnormalities found during operation of the two minimised pumps at ±4 m from the IP • Intervention needed to isolate the source of the problem • CMS • Movement of forward detectors close to HF beampipe (~14 m from IP) • Need to work with the experiment to ensure safe operation in 2009 • LHCb • The effect of outgassing from the VELO over the operational period is being analysed Beampipe Shutdown- R.Veness

  6. Consolidation Activities:Update • Aluminium bellows for ATLAS and LHCb • Calculation of possible bellows profiles in progress • Bellows testing machine re-commissioned in B.113 • Japanese aluminium bellows manufacturer visits mid Nov. • Technical student starts in AT-VAC for 1 year on 1st Nov. • Replacement LHCb-UX85/3 beryllium chamber • Call for tenders send July ‘08 • Proposal for FC on 5th Nov ‘08 • 83 weeks production time – after negotiation! Beampipe Shutdown- R.Veness

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