Speaker
Description
The ATLAS Tile Calorimeter (TileCal) is a sampling hadronic calorimeter in the central region of the ATLAS detector, consisting of steel absorber plates interleaved with plastic scintillator tiles. The High-Luminosity phase of the LHC (HL-LHC), expected to begin in 2030, will deliver an instantaneous luminosity up to 7.5 times the LHC nominal value. To meet the requirements of a 1 MHz trigger rate, increased radiation levels, and higher pile-up, the TileCal on- and off-detector electronics will be replaced during the 2026–2030 shutdown.
In the upgraded system, signals from every TileCal channel will be digitized at 40 MHz and transmitted directly to the back-end electronics, where they will be reconstructed and provided to the first-level trigger. This architecture will improve the precision of calorimeter information available to the trigger and enable more sophisticated trigger algorithms. The modular front-end electronics feature radiation-tolerant commercial off-the-shelf components and redundant design to minimise single points of failure. Timing, control, and data communication are implemented using modern field-programmable gate arrays (FPGAs) and high-speed optical links operating at up to 9.6 Gb/s.
The TileCal Phase-II upgrade programme has been supported by an extensive R&D and test-beam programme. This contribution presents the ongoing development of the on- and off-detector electronics, their expected performance and results from test-beam campaigns with electronics prototypes, as well as the optics robustness studies.