Chapter 8: Collider-experiment interface
The HL-LHC targeted luminosities for the four main experiments will require upgrades of multiple subsystems in In particular, the LHCb experiment subsystems as the vertex locator (VELO), the ring-imaging Cherenkov (RICH) detectors and the tracking system will undergo a major upgrade in LS2, and its surrounding protection systems will be upgraded with neutral absorbers (TANB) to allow to reach the HL-LHC foreseen peak luminosity as from Run 3. Also, in LS2, ALICE will replace its beam-pipe for a new one, with smaller diameter and will also replace its tracking system, time projection chamber and will install a new fast interaction trigger detector. In ATLAS and CMS during Long Shutdown 2 (LS2) and Long Shutdown 3 (LS3) the inner tracker, trigger system, calorimeter, and muon detection systems capable of operating at the foreseen pile-up density, increased radiation environment and minimisation of activation will be replaced.
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