Chamonix 2011 LHC Performance Workshop

Session

Session 02 Shutdown 2012 (Part 1)

Session02

24 Jan 2011, 17:00

Chamonix

Conveners

Session 02 Shutdown 2012 (Part 1)

• Simon Baird (Chair)
• Katy Foraz (Scientific Secretary)

40. Which systems (except main circuits) should be commissioned/tested for 7TeV operation before the long shutdown?

Dr Mirko Pojer (CERN)

24/01/2011, 17:00

The key driver of the long 2012/13 shutdown is the Consolidation of the 13 kA splices. Once the machine will be back to operation, the increase of energy to 7 TeV should be possible. Are all circuits and systems ready for 7 TeV operation? This talk will focus on what else could limit LHC high energy operation and how we can know that in advance. A period of dedicated testing at the end of...

62. What are the consequences of delaying the shutdown from 2012 to 2013 for Radiation Protection?

Stefan Roesler (CERN)

24/01/2011, 17:25

The residual induced radio-activity in the LHC underground areas in 2012 will be estimated (assuming 200 days of high intensity proton operation in 2011). These estimates will be compared with the levels that would be expected in 2013 (assuming 200 days of high intensity proton operation in both 2011 and 2012). With these estimations some consequences of delaying the shutdown from 2012 to...

59. Splice Consolidation. What will we do?

Paolo Fessia (CERN)

24/01/2011, 17:40

In the frame of the next long shut-down of the LHC, it is foreseen to intervene on all the 13kA interconnections in order to guarantee the necessary margin and redundancy to provide safe LHC operation at 7 TeV. In this talk we will provide an overview of the development work performed in 2010, the current technical solution and validation test results, and the remaining work to be performed in...

27. Work organization for splice consolidation

Francesco Bertinelli (CERN)

24/01/2011, 18:05

The Splices Task Force has worked in 2010 to prepare the necessary interventions for 7 TeV operation. The design solution for consolidating the main interconnection splices is well advanced. The required activities to implement it are described, highlighting working assumptions, missing resources and schedule considerations. Progress has also been made in assessing other splices, 6 kA praying...

34. Vacuum - Much Ado about Nothing

Dr Vincent Baglin (CERN)

24/01/2011, 18:40

During the next long shutdown, the majority of the 557 LHC beam and insulation vacuum volumes must be vented and opened. The activities proposed by the Vacuum, Surfaces and Coatings Group will be elaborated, including their implications for other Groups, together will an estimation of the extensive VSC workload that is generated by other activities eg splice consolidation, new collimators and...

33. Installing collimators in the next long shut-down: plans, status and challenges

Vittorio Parma (CERN)

24/01/2011, 19:05

The first part of the collimation upgrade plan features the installation of 4 collimators in the 2 DS of point 3, in addition to the upgrade of the existing collimation system. What makes this upgrade so special is that for the first time collimators will be placed within the continuous cryostat of the LHC sectors. For this purpose, 16 main dipoles and 8 main quadrupoles will have to be...

38. Cryogenic systems : which consolidations shall be done in 2012/13 ?

Olivier Pirotte (CERN)

24/01/2011, 19:30

The operation of the cryogenic systems during the first two years at half of the nominal energy has highlighted a number of required consolidations. The main projects will be reviewed with emphasis on safety issues, LHC downtime risk and cryogenic systems performance. Finally their status, cost, resources and planning will be summarized.

28. Cryomagnets, Interconnections, Superconducting Circuits: What to do in 2012/13 if you are not consolidating splices ?

Jean-Philippe Tock (CERN)

24/01/2011, 19:55

The interventions affecting the cryomagnets, the interconnections and/or the superconducting circuits, excluding main splices consolidation and QPS interventions will be presented. All the tasks not covered in other talks of this session will be detailed, especially: the replacement of cryomagnets, the consolidation of the connection cryostats, the repair of interrupted Y-lines, the...