Investment for RI CERN-CZ (CERN-INV)

The project will modernize the workplaces in the participating Czech institutions so that they fulfill the role of a reliable partner with great added value for experiments at CERN. Specifically, it will implement the modernization of computing and storage capacities that are part of the international grid environment WLCG (Worldwide LHC Computing Grid), and which provide the required capacities mainly for the LHC experiments ALICE and ATLAS. These capacities will be located in the already existing WLCG Tier-2 center for the Czech Republic, operated at the Institute of Physics of the Academy of Sciences of the Czech Republic (FZU) with additional resources at the Institute of Nuclear Physics (UJF) and at the Faculty of Mathematics and Physics of Charles University. The project will build or retrofit three laboratories (one each at MFF UK, FZU and FJFI). The MFF UK and FZU laboratories are used for the development and mass measurement of silicon detectors for ATLAS experiment, the FJFI laboratory will provide space for the study of ALICE scintillation detectors and photosensors. The ATLAS experiment is preparing a completely new silicon track detector ITk (Inner tracker) for the next stage of measurements at the LHC accelerator (Run 4, start in 2029). The Czech Republic undertook to measure the quality of 4,500 radiation-resistant strip detector sensors. This work has already started in the existing laboratory. The newly built laboratories at FZU and MFF will enable the investigation of other characteristics of these sensors, which prove to be important after measuring the first part of the samples. An essential aspect is also the ongoing work on the development of new radiation-resistant detectors at CERN's DRD3 (Detector Research and Development) program, which is part of the ECFA (European Committee for Future Accelerators) roadmap. The laboratory at FJFI will contribute to the development of detectors for the LHC experiment ALICE. This detector specializes in measuring heavy ion collisions. It underwent a major reconstruction before the current stage of data collection at the LHC (Run 3, 2022–2025). A subsequent new inner detector is planned for Run 5 (between 2035 and 2038).