Göttingen 2025 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 34: Data, AI, Computing, Electronics IV (DAQ, Detector Electronics)

T 34.3: Vortrag

Dienstag, 1. April 2025, 16:45–17:00, VG 2.102

Towards Data Transfer and Monitoring Interfaces for the future Signal Processor of the ATLAS Liquid Argon Calorimeters — •Markus Helbig, Rainer Hentges, Arno Straessner, Johann Christoph Voigt, and Philipp Welle — Institut für Kern- und Teilchenphysik, TU Dresden

During the Phase-II Upgrade of the ATLAS Liquid Argon Calorimeter System, the new LAr Signal Processor (LASP) system will be installed. With the HL-LHC starting operation in 2030, this off-detector processing system will enable the use of novel, more powerful algorithms for energy reconstruction implemented on Intel Agilex 7 FPGAs.

Beside the main readout path, the LASP will provide fine granular and pre-summed energies and energy threshold values to two new ATLAS trigger systems – the Global Event Processor (GEP) and the Forward Feature Extractor (fFEX). For both interfaces, the preferred protocol candidate is the Interlaken-based core1990, operating at a speed of 25.78125 Gbps. Its functionality and properties are currently being verified on the Agilex 7 FPGA.

Additionally, the LASP firmware will also contain several registers for control and monitoring purposes. The implementation is based on the IPbus protocol embedded in a custom framework. The physical connections are realized using a Gigabit Ethernet interface.

The presentation will summarize the challenges, recent progress and results of the LASP interface projects.

Keywords: Liquid Argon; Calorimeter; Interlaken; Ethernet