Aachen 2019 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 66: DAQ und Trigger III

T 66.3: Vortrag

Mittwoch, 27. März 2019, 16:30–16:45, S02

A Compact First-Level Muon Track Trigger for the Phase-II ATLAS experiment at the HL-LHC — •Davide Cieri, Markus Fras, Oliver Kortner, Sandra Kortner, Hubert Kroha, and Sebastian Nowak — Max-Planck-Institut für Physik, Munich, Germany

Single muon triggers will still be crucial for the physics programme of the experiments at the High Luminosity LHC. To keep the rates of these triggers at an acceptable level, the ATLAS collaboration will significantly upgrade the muon spectrometer in LS3 to be ready for Phase-II. The new L0 trigger will integrate data from the Monitored Drift Tube (MDT) chambers to reduce the accidental trigger rates and sharp the trigger turn-on curves.

The future L0 trigger system will use data from the fast Resistive Plate Chambers (RPC) and Thin Gap Chambers (TGC) to identify the bunch crossing in which the muon was created. This information will be then passed to the downstream L0 MDT trigger, where matched MDT hits will be used to precisely measure the muon trajectory, and hence, the transverse momentum.

A fast compact muon track finding algorithm is presented, where muon track candidates are reconstructed using a binning algorithm based on a 1D Hough Transform. The algorithm has been designed and implemented with a hardware demonstration system using Xilinx Evaluation ZC706 and proFPGA duo boards. The system is meant to prove the concept towards the realisation of an official ATLAS MDT trigger processor prototype.