| ATLAS Note | |
| Report number | ATL-MUON-PROC-2024-004 |
| Title | The New Small Wheel Trigger for the ATLAS experiment |
| Author(s) | Zormpa, Olga (Nat. Cent. for Sci. Res. Demokritos (GR)) |
| Corporate Author(s) | The ATLAS collaboration |
| Collaboration | ATLAS Collaboration |
| Publication | 2024 |
| Imprint | 25 Jun 2024 |
| Number of pages | 2 |
| In: | Nucl. Instrum. Methods Phys. Res., A 1067 (2024) 169660 |
| In: | 16th Pisa Meeting on Advanced Detectors (Pisameet 2024), La Biodola, Isola D'elba, Italy, 26 May - 1 Jun 2024, pp.169660 |
| DOI | 10.1016/j.nima.2024.169660 |
| Subject category | Particle Physics - Experiment |
| Accelerator/Facility, Experiment | CERN LHC ; ATLAS |
| Free keywords | ATLAS experiment, Run-3, New Small Wheel, TDAQ, sTGC, Pad Trigger, Trigger Processor |
| Abstract | The ATLAS New Small Wheel (NSW) Muon spectrometer upgrade, completed in 2022, was the largest Phase I detector upgrade among LHC experiments. The NSW enhances triggering in the endcap region (1.3 < |η| < 2.4) by confirming muons from the Interaction Point (IP) and rejecting fake contributions. It also improves muon tracking with 2.5 million high-resolution channels across 16 layers. The NSW Trigger, based on small-strip Thin Gap Chambers (sTGC) and Micromegas (MM) technologies, provides Level-1 triggers at every Bunch Crossing (BC) with a fixed low latency (44 BC). Integrated into ATLAS in 2023, the NSW Trigger significantly reduces fake rates and overall readout deadtime. The custom electronics of the NSW Trigger system efficiently collect, process, and trigger on IP muons, focusing on the fully operational sTGC pad-only path based on the Pad Trigger (PT) and Trigger Processor (TP) FPGA based boards. Performance studies using 13.6 TeV pp collisions are presented, demonstrating NSW's readiness for the High Luminocity LHC (HL-LHC) era and outlining Phase II upgrade perspectives. |
Corresponding record in: Inspire
Element opprettet 2024-06-25, sist endret 2024-10-10