| CMS Note | |
| Report number | CMS-CR-2018-099 |
| Title | The CMS Data Acquisition System for the Phase-2 Upgrade |
| Author(s) | Hegeman, Jeroen Guido (CERN) |
| Publication | 2018 |
| Collaboration | CMS Collaboration |
| Imprint | 25 Jun 2018 |
| Number of pages | 6 |
| Presented at | 21st IEEE Real Time Conference, Williamsburg, Va, United States Of America, 9 - 15 Jun 2018 |
| Subject category | Detectors and Experimental Techniques |
| Accelerator/Facility, Experiment | CERN LHC ; CMS |
| Keywords | General |
| Abstract | During the third long shutdown of the CERN Large Hadron Collider, the CMS Detector will undergo a major upgrade to prepare for Phase-2 of the CMS physics program, starting around 2026. The upgraded CMS detector will be read out at an unprecedented data rate of up to 50Tb/s with an event rate of 750 kHz, selected by the level-1 hardware trigger, and an average event size of 7.4 MB. Complete events will be analyzed by the High-Level Trigger (HLT) using software algorithms running on standard processing nodes, potentially augmented with hardware accelerators. Selected events will be stored permanently at a rate of up to 7.5 kHz for offline processing and analysis. This paper presents the baseline design of the DAQ and HLT systems for Phase-2, taking into account the projected evolution of high speed network fabrics for event building and distribution, and the anticipated performance of general purpose CPU. In addition, some opportunities offered by reading out and processing parts of the detector data at the full LHC bunch crossing rate (40 MHz) are discussed. |
Record created 2018-07-06, last modified 2018-07-06