CERN is pausing operations of the Large Hadron Collider (LHC) for a planned multi-year upgrade, with the facility expected to resume in 2030. The shutdown is part of the High-Luminosity LHC (HL-LHC) project, which aims to increase the collider’s performance and sensitivity beyond earlier LHC runs.
Across reporting, CERN’s LHC is described as entering a planned four-year period of work rather than an indefinite closure, during which accelerator systems are upgraded to support higher collision rates and improved data collection. The upgrade is intended to make the collider roughly an order of magnitude more sensitive than the initial LHC configuration, improving the potential for studying rare processes and probing fundamental physics questions.
One outlet frames the pause as a “farewell” while other emphasizes it as a scheduled restart (“see you later”), but both agree on the core timeline: the LHC is shut down now and the HL-LHC is due to debut in 2030.
