CMS Upgrades with a focus on detector technologies

In 2026 the Large Hadron Collider after its upgrade will provide an instantaneous luminosity of 5÷7×10³⁴ cm²s⁻¹, which is three times higher than the nominal luminosity. The so-called High Luminosity LHC will be in operation for about ten years. Such a long operation means that detectors will be exposed to a very high irradiation dose. These two factors - the high instantaneous luminosity and the large irradiation dose - require more robust and higher granularity detectors and significantly faster data transmission and analysis. To face these challenges the CMS detector will be significantly upgraded in the coming years. It is planned to completely rebuild the tracker system, endcap calorimeters and install a new MIP (minimum ionizing particle) timing detector. In this paper a brief review of the CMS detector upgrades will be given, with more details on the tracker, the calorimeters and the timing detector. (paper)