ATLAS and CMS prepare for Phase II

ATLAS and CMS prepare for Phase II

The installation of a prototype GEM (gas electron multiplier) forward-muon detector in 2021. Credit: CERN-PHOTO-202111-168-5

The installation of a prototype GEM (gas electron multiplier) forward-muon detector in 2021 (Image: CERN)

The ambitious Phase II upgrades of the ATLAS and CMS detectors, necessary to deal with the tenfold increase in data to be delivered by the High-Luminosity LHC, are pushing detector technologies to new heights: