The underground structures of the High-Luminosity LHC have been connected to the LHC tunnel

The LHC will restart in May 2021 and Run 3 will be extended by one year

The socioeconomic and cultural benefits from upgrading the Large Hadron Collider exceed the project’s costs

CERN surveyors have developed a procedure based on interferometry to determine the position of cold masses inside the cryostats of the future HL-LHC

The CMS muon system is being upgraded to help track muons with ever-higher precision

A new seismic device developed by CERN and JINR is now being tested at the Advanced Virgo detector

The first definitive component of the High-Luminosity LHC, an absorber designed to protect the machine, has been installed in the LHC

Work for the High-Luminosity LHC is in progress right under our feet

A 1000+ page report quantifies the physics potential of the High-Luminosity Large Hadron Collider

After years of careful preparation, the LHC’s second long shutdown, LS2, is now under way. Over the coming 18 months, the upgrade of the LHC’s injector complex will be the primary focus for technical teams across the Organization

With the LHC switched off for a two-year technical stop, CMS is undergoing significant maintenance and upgrades