Name: Review of the commissioning of Sector 45
Start: 2008-02-28T08:30:00+01:00
End: 2008-02-28T18:00:00+01:00
Location: CERN

Review of the commissioning of Sector 45

Thursday, 28 February 2008 - 08:30

Monday, 25 February 2008
Tuesday, 26 February 2008
Wednesday, 27 February 2008
Thursday, 28 February 2008

08:30 General Overview

08:30 - 09:20
Room: AT Auditorium
Identification of main issues appearing during the commissioning Sector 45 - Roberto Saban (CERN)
Identification of main issues appearing during the commissioning Sector 45
- Roberto Saban (CERN)
08:30 - 08:50
Room: AT Auditorium - 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
09:00 Powering Test Overview - Boris Bellesia (Politecnico di Torino)
Powering Test Overview
- Boris Bellesia (Politecnico di Torino)
09:00 - 09:20
Room: AT Auditorium - 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?
09:30 Safety and Access

09:30 - 10:50
Room: AT Auditorium
Safety and access I - Anne Funken (CERN)
Safety and access I
- Anne Funken (CERN)
09:30 - 09:50
Room: AT Auditorium - Electrical safety during interventions, “consignation” - Electrical safety subsectors
10:00 Safety and access II - Magali Gruwe (CERN)
Safety and access II
- Magali Gruwe (CERN)
10:00 - 10:20
Room: AT Auditorium - Hardware commissioning using the access system - Set the rules for access, different modes
10:30 Safety and access III - Karl Hubert Mess (CERN AT-MEL) Hugues Thiesen
Safety and access III
- Karl Hubert Mess (CERN AT-MEL)
- Hugues Thiesen
10:30 - 10:50
Room: AT Auditorium - Tunnel access during powering – what can access during powering as a function of current in the different circuits? Clear and transparent rules.
10:50 Coffee-break

10:50 - 11:10
Room: AT Auditorium
11:10 Cryo Performance & Operation - Serge CLAUDET (CERN AT ACR)
Cryo Performance & Operation
- Serge CLAUDET (CERN AT ACR)
11:10 - 11:30
Room: AT Auditorium - 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?
Cryogenics, DFBs and current leads

11:10 - 11:30
Room: AT Auditorium
11:40 Cryogenic conditions for powering tests - Andrzej SIEMKO (CERN AT-MTM)
Cryogenic conditions for powering tests
- Andrzej SIEMKO (CERN AT-MTM)
11:40 - 12:00
Room: AT Auditorium - 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
Powering, Power Converters, Quench Protection System, 600A and 13kA Energy Extraction

11:40 - 14:50
Room: AT Auditorium
12:10 Power Converters - David Nisbet (CERN) Yves Thurel (CERN)
Power Converters
- David Nisbet (CERN)
- Yves Thurel (CERN)
12:10 - 12:30
Room: AT Auditorium - 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?
12:30 Lunch Break

12:30 - 14:00
Room: AT Auditorium
14:00 Quench Protection and Energy Extraction System - Reiner Denz (CERN AT-MEL-PM) Knud Dahlerup-Petersen (CERN)
Quench Protection and Energy Extraction System
- Reiner Denz (CERN AT-MEL-PM)
- Knud Dahlerup-Petersen (CERN)
14:00 - 14:20
Room: AT Auditorium - 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
14:30 Time for commissioning versus objectives - Antonio Vergara Fernandez (Cent.de Investigac.Energeticas Medioambientales y Tecnol. (CIEMA)
Time for commissioning versus objectives
- Antonio Vergara Fernandez (Cent.de Investigac.Energeticas Medioambientales y Tecnol. (CIEMA)
14:30 - 14:50
Room: AT Auditorium - 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?
15:00 Powering Tests and Magnet Performance Panel

15:00 - 15:50
Room: AT Auditorium
Procedures - Walter Venturini Delsolaro (CERN) Nuria Catalan Lasheras (CERN)
Procedures
- Walter Venturini Delsolaro (CERN)
- Nuria Catalan Lasheras (CERN)
15:00 - 15:20
Room: AT Auditorium - 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?
15:30 What quenches did we observe? What is expected? - Arjan Verweij (CERN) Robert Henry Flora (Fermi National Accelerator Lab. (Fermilab))
What quenches did we observe? What is expected?
- Arjan Verweij (CERN)
- Robert Henry Flora (Fermi National Accelerator Lab. (Fermilab))
15:30 - 15:50
Room: AT Auditorium - What circuits? - What quenches? - Why did it quench?
15:50 Coffee-break

15:50 - 16:10
Room: AT Auditorium

16:10 Post-Mortem, Logging, Sequencer, Tracking data and progress after the tests

16:10 - 17:30
Room: AT Auditorium
Tools provided by CO - Markus Zerlauth (CERN)
Tools provided by CO
- Markus Zerlauth (CERN)
16:10 - 16:30
Room: AT Auditorium - 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?)
16:40 Tools for coordination - Alvaro Marqueta Barbero (Cent. Invest. Energ. Medioamb. Tec. (CIEMAT) - Consejo Sup. de I)
Tools for coordination
- Alvaro Marqueta Barbero (Cent. Invest. Energ. Medioamb. Tec. (CIEMAT) - Consejo Sup. de I)
16:40 - 17:00
Room: AT Auditorium - How to improve the Powering Test Visualisation tool, etc. - How to improve the planning tool (EXCEL?) Can both be merged?
17:10 Feed Back - LHC HWC Operators Alick Macpherson
Feed Back
- LHC HWC Operators
- Alick Macpherson
17:10 - 17:30
Room: AT Auditorium
17:40 Final session

17:40 - 18:00
Room: AT Auditorium
Summary and Discussions - Rüdiger Schmidt (CERN)
Summary and Discussions
- Rüdiger Schmidt (CERN)
17:40 - 18:00
Room: AT Auditorium

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