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Review of the commissioning of Sector 45

→ Europe/Zurich
AT Auditorium (CERN)

AT Auditorium

CERN
Roberto Saban, Rudiger Schmidt
Description
Forum for discussion to improve strategies for the commissioning of the SC circuits in the next LHC Sectors
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Participants
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    • 08:30 → 09:20
      General Overview
    • 08:30 → 08:50
      Identification of main issues appearing during the commissioning Sector 45 20m
      - Event driven by view from operation - invitation to an open discussion - Scenarios: commissioning to 450 GeV, 2 TeV and 4 .. 6 TeV - Key dates in preparation for the next sector and outlook to planning - Discussions on improvements: what can be done in the next 3-4 weeks? - 2 shifts during 5 days versus 3 shifts during 7 days, , MPP analysis, what can be done in a nightshift – WE? Bottlenecks in manpower - Organisation: HC coordinator on a weekly basis? For coordination between sectors etc. - (written) guidelines for operators (coordination tools, conditions for powering) - Commissioning meetings efficient? How continue activities during meetings? - Follow-up by mini teams on: Automatic commissioning and controls issues, Tools required to optimize commissioning, Organisation, System upgrades and improvements
      Speaker: Roberto Saban (CERN)
      Slides
    • 09:00 → 09:20
      Powering Test Overview 20m
      - What happens before powering tests after cooldown - Main issues that slowed us down - ELQA: Continue as for sector 45? Further optimisation of the strategy? - What has been done during the powering tests? During what time? By whom? Efficiency? - How to ensure minimization of re-commissioning 45 and to secure what has been achieved? - How to avoid that changes during the “shutdown” require re-commissioning?
      Speaker: Boris Bellesia (Politecnico di Torino)
      Slides
    • 09:30 → 10:50
      Safety and Access
    • 09:30 → 09:50
      Safety and access I 20m
      - Electrical safety during interventions, “consignation” - Electrical safety subsectors
      Speaker: Anne Funken (CERN)
      Slides
    • 10:00 → 10:20
      Safety and access II 20m
      - Hardware commissioning using the access system - Set the rules for access, different modes
      Speaker: Magali Gruwe (CERN)
      Slides
    • 10:30 → 10:50
      Safety and access III 20m
      - Tunnel access during powering – what can access during powering as a function of current in the different circuits? Clear and transparent rules.
      Speakers: Mr Hugues Thiesen, Dr Karl Hubert Mess (CERN AT-MEL)
      Slides
    • 10:50 → 11:10
      Coffee-break
    • 11:10 → 11:30
      Cryo Performance & Operation 20m
      - Availability for cryogenic system - Recovery time after quenches: what can we expect? - Operation overnight and over the weekend: is it possible? - Operation with several sectors in parallel, what will change? - Presence in the CCC - Level measurements - How to ensure a correct Helium level for operation?
      Speaker: Mr Serge CLAUDET (CERN AT ACR)
      Slides
    • 11:10 → 11:30
      Cryogenics, DFBs and current leads
    • 11:40 → 12:00
      Cryogenic conditions for powering tests 20m
      - What can be done at what temperature? (e.g. below 2.8 K low current tests), and when can we start the tests? - Relaxed operation at reduced current (e.g. can we operate without cold compressors a magnet currents corresponding to 2 TeV)? - Table for all steps and all circuits? - Orbit correctors 60 / 120 A – what conditions? What needs to be watched by operators? - Procedure: masking of interlocks to provide CryoStart and CryoMaintain
      Speaker: Dr Andrzej SIEMKO (CERN AT-MTM)
      Slides
    • 11:40 → 14:50
      Powering, Power Converters, Quench Protection System, 600A and 13kA Energy Extraction
    • 12:10 → 12:30
      Power Converters 20m
      - 600 A spikes during 0 V crossing and QPS system - Spikes and how to avoid them (IERROR and IEARTH) - RB power converter performance, is there an issue?
      Speakers: David Nisbet (CERN), Yves Thurel (CERN)
      Slides
    • 12:30 → 14:00
      Lunch Break
    • 14:00 → 14:20
      Quench Protection and Energy Extraction System 20m
      - Partial heater firing if switches do not open – yes/no? - Access to the tunnel for 600 A extraction switches, can be optimised? - Firing heaters without current in the magnet circuit – Why? EMC due to other tests? - Closing switches for many circuits
      Speakers: Knud Dahlerup-Petersen (CERN), Reiner Denz (CERN AT-MEL-PM)
      Slides
    • 14:30 → 14:50
      Time for commissioning versus objectives 20m
      - 450 GeV, 2 TeV and 5 .. 6 TeV: what circuits at what current? What can be left for later? (remember: it is always possible to bring in other circuits on the fly) - How much time is required to commission for injection, for ~2 TeV, 4-6 TeV and 7 TeV? What could be gained? What circuits could be left out? - When is tunnel access required? By whom? How to optimise it? What can be done without access to the tunnel?
      Speaker: Antonio Vergara Fernandez (Cent.de Investigac.Energeticas Medioambientales y Tecnol. (CIEMA)
      Slides
    • 15:00 → 15:50
      Powering Tests and Magnet Performance Panel
    • 15:00 → 15:20
      Procedures 20m
      - Procedures and their realisation in sequences: can they be lighter? - EDMS approval of procedures and their changes - Analysis and approval of test steps in CCC – can it be improved?
      Speakers: Dr Nuria Catalan Lasheras (CERN), Walter Venturini Delsolaro (CERN)
      Slides
    • 15:30 → 15:50
      What quenches did we observe? What is expected? 20m
      - What circuits? - What quenches? - Why did it quench?
      Speakers: Arjan Verweij (CERN), Robert Henry Flora (Fermi National Accelerator Lab. (Fermilab))
      Slides
    • 15:50 → 16:10
      Coffee-break
    • 16:10 → 17:30
      Post-Mortem, Logging, Sequencer, Tracking data and progress after the tests
    • 16:10 → 16:30
      Tools provided by CO 20m
      - Status of PM system? Data gets sometimes stuck? - PM event builder - Can we become more efficient with more automatic analysis? - Coherence MTF – LSA etc. - Long tests: can one reduce the time of the test online, for example due to a long plateau? PASS TO THE NEXT STEP button. - Managing powering: better SOC names to avoid confusion? SOCs per day? - Tools for powering groups of circuits ((based on SOCs?)
      Speaker: Dr Markus Zerlauth (CERN)
      Slides
    • 16:40 → 17:00
      Tools for coordination 20m
      - How to improve the Powering Test Visualisation tool, etc. - How to improve the planning tool (EXCEL?) Can both be merged?
      Speaker: Alvaro Marqueta Barbero (Cent. Invest. Energ. Medioamb. Tec. (CIEMAT) - Consejo Sup. de I)
      Slides
    • 17:10 → 17:30
      Feed Back 20m
      Speakers: Alick Macpherson, LHC HWC Operators
      Slides
    • 17:40 → 18:00
      Final session
    • 17:40 → 18:00
      Summary and Discussions 20m
      Speaker: Mr Rüdiger Schmidt (CERN)
      Slides
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