A year of works in the HiLumi LHC underground and surface buildings

By Thomas Bauler and Henry De Maynard (CERN)

2025 was once again an important and strategic year for the High-Luminosity LHC (HiLumi LHC) Project as a whole, including for Work Package 17 (WP17), responsible of infrastructure, logistics and civil engineering.

2025 was the last full year to advance the installation of major infrastructure before the start of Long Shutdown 3 (LS3). This race against time has seen many accomplishments throughout the year, with much work completed by the various sub-WPs for WP17.