Abstract
The High-Luminosity phase of LHC, scheduled to begin in late 2027, will deliver up to ten times the LHC nominal instantaneous luminosity to the experiments. To ensure sound performance under the higher pile-up and radiation conditions, the ATLAS hadronic Tile Calorimeter (TileCal) will replace both the on- and off- detector electronics systems during the LHC long shutdown 3 (2025-2027). The upgraded front-end system will continuously digitize and read out shaped photomultiplier tube (PMT) signals from every TileCal cell at a rate of 40 MHz, transmitting them over high-speed fiber links to the new back-end electronics to be stored in latency pipelines and digitally summed to produce improved trigger tower data for the Level-1 trigger. The front-end electronics are based on radiation-qualified commercial components, and use extensive redundancy to minimize single point failures. The Tile upgrade program has undergone extensive R&D and beam tests, and a “demonstrator” module was installed on ATLAS in 2019 for integration and testing in the actual detector environment.
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