Speaker
Description
The ATLAS Thin Gap Chambers (TGCs), which form the outer muon detector system, play a key role in triggering high-transverse-momentum muons in the endcap region. To meet the requirements of the ATLAS trigger and data acquisition system at the High-Luminosity LHC, the trigger and readout electronics of the TGC system are being upgraded. Detector signals are rapidly processed by on-detector front-end electronics and transmitted optically to large-scale FPGA boards in the counting room, where a pattern-matching-based track reconstruction algorithm identifies muons. The mass production of approximately 1,500 front-end boards has been completed, and installation will begin at the start of the LHC long shutdown in 2026. The radiation tolerance of the on-detector front-end electronics was verified through in-situ test operation during LHC collisions in 2025, including measurements of the single-event upset rate and validation of the automatic recovery mechanisms. The back-end electronics have reached their final design, and the evaluation of initial production boards has been completed. A full chain of the track reconstruction firmware has been developed and validated. This presentation reports on the readiness of the front-end electronics for installation and on the final design and performance of the back-end system, including results from integrated system tests.
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