Perspectives of the CMS phase-II upgrade for HL-LHC

The LHC Phase II upgrade (HL-LHC) will provide considerable increases in instantaneous and integrated luminosities, leading to a total of 3000/fb by around 2035. This data will allow precision measurements of Higgs properties and vector boson scattering processes, and will provide substantially higher sensitivity to searches for new physics. Various subdetectors of CMS will need to be upgraded in order to operate efficiently in such a high rate and high radiation environment. CMS will receive new tracking detectors and new forward instrumentation for calorimetry and muon tagging along with an increase in the capability of the online trigger and data acquisitionsystems. The CMS Phase II upgrade program and the expected performance of the replacement detectors will be reviewed.