Erlangen 2026 – scientific programme

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T: Fachverband Teilchenphysik

T 6: Electronics, Trigger, DAQ I

T 6.3: Talk

Monday, March 16, 2026, 16:45–17:00, KH 00.023

The ATLAS Tile Calorimeter Trigger and Data Acquisition Interface: Final Design Overview and Validation Results — •Maximilian Köper and Thomas Junkermann — Kirchhoff-Institut für Physik, Heidelberg University

The ATLAS experiment is undergoing the Phase-II Upgrade to accommodate the High Luminosity LHC (HL-LHC), necessitating a complete redesign of the trigger and readout architectures to handle increased pile-up. This contribution focuses on the Tile Calorimeter's Trigger and Data Acquisition interface (TDAQi), an ATCA Rear Transition Module designed to bridge the off-detector electronics with the ATLAS Level-0 trigger systems.

Equipped with an AMD Kintex UltraScale+ FPGA, the TDAQi receives calibrated cell energies and computes trigger primitives at 40 MHz. Key processing tasks include forming coarse-granularity objects for electron/jet triggers, identifying muon hits, and sorting high-energy cells for the Global Trigger Processor. These operations must be executed within a strict 250 ns latency budget while managing high-speed links up to 11.2 Gbps.

We present the TDAQi design and its role in the real-time data path. The discussion focuses on the final hardware validation and integration tests required before the start of the in-house production phase. We report on the performance of the latest pre-production modules, which serve as the final verification step for the upcoming series assembly.

Keywords: Calorimeter; Trigger; Data Acquisition; FPGA; ATLAS