Upgrade of ATLAS Hadronic Tile Calorimeter for the High-Luminosity LHC

The Tile Calorimeter (TileCal) is a sampling hadronic calorimeter covering the central region of ATLAS experiment, with steel as absorber and plastic scintillators active medium. High-Luminosity phase LHC, delivering five times LHC’s nominal instantaneous luminosity, expected to begin in 2029. TileCal will require new electronics meet requirements 1 MHz trigger, higher ambient radiation, ensure better performance under high pile-up conditions. Both on- off-detector be replaced during shut-down 2026–2028. photomultiplier tube (PMT) signals from every cell digitized sent directly back-end electronics, where are reconstructed, stored, first level trigger at rate 40 MHz. This provide precision used by system allow development more complex algorithms. modular front-end feature radiation-tolerant, commercial, off-the-shelf components redundant design maintain case single points failure. timing, control, communication interface implemented modern Field-Programmable Gate Arrays (FPGAs) high-speed fiber optic links running up 9.6 Gb/s. upgrade program has included extensive R&D test beam studies. A Demonstrator module reverse compatibility respect existing was inserted August 2019 for testing actual detector ongoing developments systems, together characteristics results test-beam campaigns prototypes, discussed.