LUMINOSITY LIFETIME AT THE LHC IN 2012 PROTON PHYSICS OPERATION

摘要

In 2012, the LHC was operated at 4 TeV at top energy with beam parameters that allowed exceeding a peak instantaneous luminosity of 7500 μb~(-1) s~(-1) and a total of 23 fb~(-1) integrated luminosity in the ATLAS and CMS experiments. This paper elaborates on the evolution of the LHC luminosity and luminosity lifetime during proton physics fills and through the year 2012. Bunch to bunch differences and the impact of different machine settings are highlighted.