![]() The HL-LHC upgrade depends on several technological innovations, some of which have already been installed during CERN’s Long Shutdown 2 (LS2).įor the HL-LHC upgrade, more than one kilometre of the LHC machine needs to be replaced. For example, the High-Luminosity LHC will produce at least 15 million Higgs bosons per year, compared to around three million from the LHC in 2017. The High-Luminosity LHC will allow physicists to study known mechanisms, such as the Higgs boson, in greater detail and to observe rare new phenomena that might be revealed. The higher the luminosity, the more data the experiments can gather to allow them to observe rare processes. ![]() Luminosity is an important indicator of the performance of an accelerator: it is proportional to the number of collisions that occur in a given amount of time. The objective is to increase the integrated luminosity by a factor of 10 beyond the LHC’s design value. The High-Luminosity Large Hadron Collider (HL-LHC) project aims to crank up the performance of the LHC, to increase the potential for physics discoveries after 2029. ![]() A model of an HL-LHC magnet (Image: Miguel Mendes/CERN)
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