Chamonix 2011 Workshop on LHC Performance: Chamonix, France 24 - 28 Jan 2011

During the Chamonix 2011 workshop on LHC performance, topics relevant to take decisions to guarantee efficient and safe exploitation of the machine for both the run 2011 and for the long term have been discussed. After a review of the operations and achievements during the last run, two sessions focused on the preparations of the long shutdown required to prepare the LHC for operation with 14 TeV center of mass energy with particular attention on the impact of delaying this upgrade to 2013. Sessions on possible beam energy and luminosity aimed at optimizing the performance for the run of this year. Furthermore, the topics underground interventions, safety aspects comprising the performance of the access system and radiation monitoring and radiation to electronics have been discussed. Finally, upgrades of both the LHC the injector complex to guarantee efficient exploitation and to maximize the total integrated luminosity over the life-time of the LHC have been reviewed. This workshop was an open exchange of views and opinions. The views expressed in individual presentations do not necessarily represent those of the management.