| Published Articles | |
| Title | The CMS ECAL data acquisition system and its performance at LHC Run 2 |
| Author(s) | Mapelli, Dario (Milan Bicocca U.) |
| Collaboration | CMS |
| Publication | SISSA, 2018 |
| Number of pages | 5 |
| In: | PoS LHCP2018 (2018) 069 |
| In: | Sixth Annual Conference on Large Hadron Collider Physics, Bologna, Italy, 4 - 9 Jun 2018, pp.069 |
| DOI | 10.22323/1.321.0069 |
| Subject category | Particle Physics - Experiment ; Detectors and Experimental Techniques |
| Accelerator/Facility, Experiment | CERN LHC ; CMS |
| Abstract | In 2017 the Large Hadron Collider at CERN has provided an astonishing 50 fb$^{-1}$ of proton-proton collisions at a center-of-mass energy of 13 TeV. The CMS detector has been able to record about 90\% of this data. During this period, the CMS electromagnetic calorimeter (ECAL), based on 75848 scintillating PbWO4 crystals and a silicon and lead preshower, has continued exhibiting excellent performance with a very stable data acquisition system. The ECAL DAQ system follows a modular and scalar schema: the crystals are divided in sectors, each of them controlled by 3 interconnected boards. These boards are responsible for the configuration and control of the front-end electronics, the generation of trigger primitives for the central CMS first level trigger, and the collection of data. A multi-machine distributed software configures the electronic boards and follows the life cycle of the acquisition process. The ECAL electronics modular configuration is reflected in the software where a tree control structure is applied. Through a master web application, the user controls the communication with the sub-applications that are responsible for the off-detector board configurations. Since the beginning of Run 2 in 2015, many improvements to the ECAL DAQ have been implemented to reduce occasional errors, as well as to mitigate single event upsets in the front-end electronics, and to improve the efficiency. Efforts at the software level have been made to introduce automatic recovery in case of errors. These procedures are mandatory to have a reliable and efficient acquisition system. |
| Copyright/License | publication: (License: CC-BY-NC-ND-4.0) |
Corresponding record in: Inspire
Record created 2019-03-26, last modified 2019-10-15