Abstract
The Large Hadron Collider and the ATLAS experiment at CERN will explore new frontiers in physics in Run 3 starting in 2022. In the Run 3 ATLAS Level-1 endcap muon trigger, new detectors called New Small Wheel and additional Resistive Plate Chambers will be installed to improve momentum resolution and to enhance the rejection of fake muons. The Level-1 endcap muon trigger algorithm will be processed by new trigger processor boards with modern FPGAs and high-speed optical serial links. For validation and performance evaluation, the inputs and outputs of their trigger logic will be read out using a newly developed software-based readout system. We have successfully integrated this readout system in the ATLAS online software framework, enabling commissioning in the actual Run 3 environment. Stable trigger readout has been realized for input rates up to 100 kHz with a developed event-building application. We have verified that its performance is sufficient for Run 3 operation in terms of event data size and trigger rate. The paper will present the details of the integration and commissioning of the software-based readout system for ATLAS Level-1 endcap muon trigger in Run 3.
Highlights
The Large Hadron Collider (LHC) [1] at CERN is the world’s largest and highest-energy particle accelerator, which crosses proton bun√ches at the frequency of 40 MHz
One unit of the Level-1 endcap muon trigger readout system consists of 12 New Sector Logic (SL), one TTC Fanout Boards (TTCFOB), an Ethernet switch, an event-building application called Software-based Readout Driver (SROD) 2 running on a commercially available high-performance server (SROD server), and PCIe S-LINK [10] interface card (PCIe S-LINK Card) on the SROD server
4 Conclusion In Run 3 starting in 2022, new detectors will be introduced in ATLAS Level-1 endcap muon trigger system to enhance the rejection of fake muon triggers
Summary
The Large Hadron Collider (LHC) [1] at CERN is the world’s largest and highest-energy particle accelerator, which crosses proton bun√ches at the frequency of 40 MHz. 72 New Sector Logic (SL) boards have been newly developed to handle data from five types of detectors (i.e. TGC BW, TGC EI, Tile Calorimeter, RPC BIS78, and NSW) and to process final trigger decisions for the Level-1 endcap muon trigger. One unit of the Level-1 endcap muon trigger readout system consists of 12 New SLs, one TTCFOB, an Ethernet switch, an event-building application called Software-based Readout Driver (SROD) 2 running on a commercially available high-performance server (SROD server), and PCIe S-LINK [10] interface card (PCIe S-LINK Card) on the SROD server. The PCIe S-LINK Card transfers processed event data from SROD to ROS using S-LINK protocol via optical fibers In this new trigger readout system, SRODs running on six servers play an essential role, as they build event data for the whole Level-1 endcap muon trigger. Each application operates in obedience to the state and command stored in its RCMemory
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
