The Large Hadron Collider (LHC) at CERN, the European Laboratory for Particle Physics, is the world's largest particle accelerator enabling new physics searches and precision measurements in particle collisions at record energies. To find even rarer signals, the accelerator will be upgraded to a high-luminosity LHC (HL-LHC). Finland participates in two large LHC experiments, CMS and ALICE. To face the increased number of particle collisions and improve the measurement precision, the experiments must be upgraded as well as use extra handles like timing or extended angular coverage to separate particles coming from different simultaneous collisions. In this project, the Finnish CMS upgrade contributions concern the construction of a timing detector and an upgrade of the forward proton detection system, whereas the ALICE one covers the construction of a new charged particle tracking system. Also, an upgrade of the Finnish data storage capacity for LHC related computing is included.

2025

2027