The 3rd Cost & Schedule Review of the projects HL-LHC and LIU was held at CERN on 26th – 28th of March 2018. As usual, the panel is composed by the CMAC (CERN Machine Advisory Committee) members with the addition of a few other international experts

As mentioned in the closing remarks of the 8th HL-LHC Annual Meeting held at CERN (18th October 2018), the project is experiencing a mix of success and difficulties while passing from design and industrialization into construction.

The HL-LHC-WP5 teams are extremely busy in LS2 because some of the key upgrades for HL-LHC will already be used in LHC Run3.

Two prototypes of RF dipole cavities which provide horizontal crabbing for the HL-LHC were successfully built at CERN. The frequency tuning setup before the final two welds is shown in the figure below.

The 4th Cost & Schedule Review (CSR) of the HL-LHC project was held at CERN from 11 to 13 November 2019. The review panel was composed as usual by CERN Machine Advisory Committee (CMAC) members and ad-hoc experts.

After having observed the first cases of illness in Italy and the following isolation measures, the coronavirus SARS-Cov-2, causing the severe respiratory illness COVID-19, became a subject of major concern in Europe during February 2020.