Speaker
Description
The High Luminosity (HL-LHC) project aims to increase the integrated luminosity of CERN’s Large Hadron Collider (LHC) up to 3/ab, and 4/ab, as Nominal and Ultimate goals, respectively, over the full lifetime of the facility. The large boost in bunch population and beam brightness, compared to the currently achieved beam parameters in the LHC and stemming from the LHC injector upgrade project deployed during the previous long shutdown 2, poses several beam dynamics challenges that must be addressed, including for example electron cloud, impedance-related stability, and beam lifetime. In addition, the increasing availability of measurements for the magnets to be installed in the ATLAS and CMS interaction regions also allows for a more precise determination and optimisation of the dynamic aperture. Recently, modifications of the HL-LHC operations baseline, including ion runs throughout the lifetime of the project, led to a tighter margin on the integrated luminosity goal. Therefore, we present here an update of the baseline scenario of HL-LHC, together with alternative proposals that could mitigate potential shortcomings.
Funding Agency
Research supported by the HL-LHC project
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