May 24 – 28, 2021
America/Vancouver timezone

Upgrade of the ATLAS Level-0 Endcap Muon Trigger for HL-LHC

May 27, 2021, 5:00 AM
Poster Readout: Trigger and DAQ Posters: Trigger and DAQ


Ren Kobayashi (Kyoto University (JP))


Status of the development of the Level-0 endcap muon trigger system for the ATLAS experiment at the HL-LHC is presented. The upgraded system reconstructs muon candidates with an improved pT resolution by combining data from various sub-detectors. This is realized by exploiting evolution of data transmission technologies, to send all hit data from Thin Gap Chambers (TGCs) and other sub-detectors to the counting room.
Performance of this new trigger system is also shown. Trigger efficiency is estimated with a software based algorithm and using simulation, to be higher than 90% for the threshold of pT>20 GeV in the endcap region. Trigger rate is also estimated with a software algorithm and using pp collision data, overlaid to simulate the high pileup condition at the HL-LHC. to be lower than 25 kHz for the threshold of pT>20 GeV.
Implementations of the new trigger algorithms with firmware for an FPGA, along with development of a new trigger prototype board are also shown.

TIPP2020 abstract resubmission? Yes, this would have been presented at TIPP2020.

Primary authors

Andrei Kazarov (NRC Kurchatov Institute PNPI (RU)) Ren Kobayashi (Kyoto University (JP))

Presentation materials