LHC Performance Workshop - Chamonix 2012

Session

S06 - LSI (II)

8 Feb 2012, 17:00

Chamonix

Conveners

S06 - LSI (II)

• Frederick Bordry (Chair)
• Katy Foraz (scientific secretary)

31. LHC experiments upgrade and maintenance

Marzio Nessi (CERN)

08/02/2012, 17:00

All experiments plan an effective usage of the LS1 shutdown period. After three years of running they will go through a consolidation phase, mostly to fix problems which have emerged over time, like single points of failure in the infrastructure, failures of low voltage power supplies and optical links. Upgrade of some detector components will start, manly related to the beam pipe, the...

34. QPS upgrade and machine protection during LS1

Reiner Denz (CERN)

08/02/2012, 17:25

The presentation will explain all the proposed changes and discuss the impact on other shutdown activities. The upgrade of the LHC Quench Protection System QPS during LS1 with respect to radiation to electronics will concern the re-location of equipment and installation of new radiation tolerant hardware. The midterm plan for further R2E upgrades will be addressed. The protection systems for...

36. EN-EL upgrade and consolidation

Francois Duval (CERN)

08/02/2012, 17:50

EN/EL will have a huge program of work during LS1. All our projects are being organised in order to concentrate efforts for LS1 on tasks possible only during shutdowns of the machines. Therefore the EL program for the shutdown will commence early (January 2012) and will be completed later (2015). EN/EL is now starting to increase engineering resources so that newcomers will have at least a...

38. EN-CV upgrade and consolidation

Mauro Nonis (CERN)

08/02/2012, 18:10

The EN/CV group will be heavily involved into several projects and activities during LS1 within a window frame limited to around twelve months. According to the requests received so far, the majority of projects are related to the upgrade of user’s equipment, consolidation work and construction of new plants; however a part of them is needed following the experience on the first years of LHC...

42. Access strategy in the accelerator complex and experimental areas

Rui Nunes (CERN)

08/02/2012, 18:35

This paper shall review the main features of the new PS Personnel Protection System (PSPSS) as well as the main milestones for its deployment during the Long Shutdown of 2013-2014. Access conditions in the PS, SPS and LHC complexes during this period shall be described as well as the upgrades and improvements that are under preparation.

46. RF upgrade program in LHC injectors and LHC machine

Erk Jensen (CERN)

08/02/2012, 19:00

The main themes of the presently on-going RF upgrade program are: the LLRF-upgrade for PSB and PS, the study of a tuning-free wide-band system for PSB, the upgrade of the SPS 800 MHz amplifiers and beam controls and the upgrade of the transverse dampers of the LHC. Whilst LHC Splice Consolidation is certainly the top priority for LS1, some necessary RF consolidation and upgrade is necessary to...

48. What is the maximum reasonable energy?

Ezio Todesco (CERN)

08/02/2012, 19:30

In 2008 all the LHC main dipole circuits were trained to 5 TeV, two sectors to 6 TeV, and one sector was pushed up to 6.6 TeV. In the 5-6 TeV range, a few quenches were needed to retrain the LHC dipoles, and none for the quadrupoles. On the other hand, in the 6-7 TeV range a larger than expected number of quenches was observed in the main dipoles. Using this limited set of data, tentative...