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LHC Performance Workshop - Chamonix 2009

2–6 Feb 2009
Chamonix
Europe/Zurich timezone
DISCLAIMER “The Chamonix workshop was an open exchange of views and opinions. All the presentations made at the workshop are available here. The views expressed in individual presentations do not necessarily represent those of the CERN management.”

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Session

Session 05 - Shutdown Modifications 2008/9 and Future shutdowns

S05
4 Feb 2009, 08:30
Le Majestic (Chamonix)

Le Majestic

Chamonix

Presentation materials

  1. 80. Where are we with the current shutdown?
    Julie Coupard, Katy Foraz
    04/02/2009, 08:30
    The first shutdown of the LHC machine started on the 17th of November 2008. In addition to typical shut-down interventions and the works already foreseen (e.g. phase 1 collimator installation), some additional consolidation work is needed. On top of this comes the work caused by the 19 September incident and the subsequent tests carried out in November and December. This talk will give an...
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  2. 89. Alternative scenarios for the current shutdown
    Julie Coupard, Katy Foraz
    04/02/2009, 09:05
    Alternative options for the current shutdown will be presented. These options include warming up additional sectors to complete the consolidation activities. The potential impact of these revised schedules on the beam schedule in 2009, as well as the length and timing of the following shutdown will also be presented.
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  3. 102. Running through the winter 2009/10? Is it just a cost issue?
    Mario Batz
    04/02/2009, 09:25
    As a complement to the previous talk, a number of questions, that will need to be addressed in order to consider LHC beam operation over the winter 2009-10, will be raised.
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  4. 81. How do we keep track of upgrades / changes?
    Rüdiger Schmidt
    04/02/2009, 09:40
    Layout and electrical circuits of the LHC machine are well documented in the databases and the data has been used throughout hardware and beam commissioning. During the shutdown a number of changes will be made all around the accelerator, to different systems. The presentation will address in what areas changes are expected and how the changes are (or are not) documented. Proposals will be...
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  5. 76. Consequences of warm-up of a sector above 80K
    Pierre Strubin
    04/02/2009, 10:40
    There may be circumstances when a sector has to be partially or totally warmed-up to temperatures above 80 K, that is when thermal dilatation starts to play a role. Some equipment have been identify as presenting a risk, like the non-conform "plug-in" modules in the arcs. Because of motion induced by thermal dilatation, the electrical (ElQA) quality control may also have to be done again...
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  6. 18. Critical spares
    Roberto Saban
    04/02/2009, 11:10
    Following the completion of the installation last year, several reviews (ATC, LTC, MARIC) were carried-out to draw up the inventory of the spare LHC components. A detailed summary of these exercises will be given and the present situation with the spares following the September 19th incident will be presented.
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