LHC Upgrade Plans: Options and Strategy

The LHC is performing very well, some design parameters have been quickly reached and even improved over design. CERN has recently organized a project, called High Luminosity LHC, regrouping all studies and hardware development needed to improve the luminosity performance of LHC, aiming to L=5 1034cm-2s-1, with luminosity levelling. This performance should enable to obtain about 250 fb-1 per year after 2022, to reach the goal of 3000 fb-1 for both ATLAS and CMS experiments. In the paper we will discuss the baseline plan for the lumi upgrade and the intial study for upgrading the collision energy, in the 27-33 TeV range.