Karlsruhe 2024 – scientific programme

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T: Fachverband Teilchenphysik

T 94: Trigger+DAQ 3

T 94.1: Talk

Thursday, March 7, 2024, 16:00–16:15, Geb. 30.23: 3/1

Hypothesis Firmware on L0Global — •Emanuel Meuser — Institut der Physik, Johannes Gutenberg Universität Mainz

During the LHC's upgrade to higher luminosity, the ATLAS trigger system will also be upgraded. The L0Global Trigger System will be added as a time-multiplexed trigger system, combining, for the first time in ATLAS, cell data from the calorimeters and Trigger Objects from upstream systems of an event onto a singular FPGA. The L0Global will also replace the L1Topo in its current functionality. Since L0Global will host a large number of algorithms, the FPGA resources for the individual algorithms are rather slim. Thus, the current parallel implementation of the L1Topo algorithmic firmware has to be adapted for usage on the L0Global.

The individual components of the firmware are serialized to take advantage of the L0Global's highly increased latency budget (from new event data every 25 ns on L1Topo to new event data every 1200 ns on L0Global) and to reduce the algorithms resource cost (from 2.5M LUTs on L1Topo to 100k LUTs on L1Topo). The overall structure of the firmware will also be adapted to fit the L0Global*s framework. These Phase-II related firmware adaptations will be discussed in detail.

Keywords: L0Global; L1Topo; Trigger; ATLAS; FPGA