| ATLAS Note | |
| Report number | ATL-DAQ-PROC-2022-027 |
| Title | The Phase-I Upgrade of the ATLAS Level-1 Calorimeter Trigger |
| Author(s) | Mkrtchyan, Tigran (Heidelberg University (DE)) |
| Corporate Author(s) | The ATLAS collaboration |
| Collaboration | ATLAS Collaboration |
| Publication | 2022 |
| Imprint | 09 Dec 2022 |
| Number of pages | 3 |
| In: | 2022 IEEE Nuclear Science Symposium (NSS), Medical Imaging Conference (MIC) and Room Temperature Semiconductor Detector (RTSD) Conference (NSS/MIC 2022), Milan, Italy, 5 - 12 Nov 2022 |
| Subject category | Particle Physics - Experiment |
| Accelerator/Facility, Experiment | CERN LHC ; ATLAS |
| Free keywords | Trigger, DAQ, Calorimeter, Level-1, FPGA |
| Abstract | The ATLAS Level-1 Calorimeter Trigger (L1Calo) is a hardware-based system that identifies events containing calorimeter-based physics objects, including electrons, photons, taus, jets, and missing transverse energy. L1Calo underwent a significant programme of upgrades for Run 3 of the LHC which is running at higher energies and instantaneous luminosity. The existing hardware will be replaced by a new system of FPGA-based feature extractor (FEX) modules, which processes finer-granularity information from the calorimeters and execute more sophisticated algorithms to identify physics objects; these upgrades will permit better performance in a challenging high-luminosity and high-pileup environment. The features of the upgraded L1Calo system will be introduced and the current status of installation and commissioning. In addition, the expected performance of L1Calo in Run 3 will be discussed. |
Record created 2022-12-09, last modified 2022-12-10