| ATLAS Note | |
| Report number | ATL-DAQ-PROC-2018-036 |
| Title | Software based control and monitoring of a hardware based track reconstruction system for the atlas experiment |
| Author(s) | Sottocornola, Simone (INFN Pavia and Universita' di Pavia, Dipartimento di Fisica) |
| Corporate Author(s) | The ATLAS collaboration |
| Collaboration | ATLAS Collaboration |
| Publication | 2018 |
| Imprint | 24 Nov 2018 |
| Number of pages | 9 |
| In: | EPJ Web Conf. 214 (2019) 01021 |
| In: | 23rd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2018, Sofia, Bulgaria, 9 - 13 Jul 2018, pp.01021 |
| DOI | 10.1051/epjconf/201921401021 |
| Subject category | Particle Physics - Experiment |
| Accelerator/Facility, Experiment | CERN LHC ; ATLAS |
| Free keywords | FTK ; FTK Online Software ; FTK monitoring |
| Abstract | During the Run-2 of the Large Hadron Collider (LHC) the instantaneous luminosity exceeds the nominal value of $10^{34}$ cm$^{-2}$ s$^{-1}$ with a 25 ns bunch crossing period and the number of overlapping proton-proton interactions per bunch crossing increases up to about 80. These conditions pose a challenge to the trigger system of the experiments that has to control rates while keeping a good efficiency for interesting physics events. This document summarizes the software based control and monitoring of a hardware-based track reconstruction system for the ATLAS experiment, called Fast Tracker (FTK), composed of associative memories and FPGAs operating at the rate of $100$ kHz and providing high quality track information within the available latency to the high-level trigger. In particular, we will detail the commissioning of the FTK within the ATLAS online software system presenting the solutions adopted for scaling up the system and ensuring robustness and redundancy. We will also describe the solutions to challenges such as controlling the occupancy of the buffers, managing the heterogeneous and large configuration, and providing monitoring information at sufficient rate. |
| Related document | Slides ATL-DAQ-SLIDE-2018-560 |
| Copyright/License | publication: © 2019-2025 the Authors (License: CC-BY-4.0) |
Corresponding record in: Inspire
Record created 2018-11-24, last modified 2020-08-31
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Original Communication (restricted to ATLAS)
Original Communication (restricted to ATLAS)