1. The LHCb Online system in 2020: trigger-free read-out with (almost exclusively) off-the-shelf hardware
- Author
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C. Quast, P.Y. Duval, Stephane T'Jampens, Guillaume Vouters, L. Brarda, N. Neufeld, Federico Cindolo, Federico Alessio, Matteo Manzali, A. Amihalachioaei, H. Mohammed, R. Schwemmer, Francesca M. Pisani, P. Fernández, Luis Alberto Granado Cardoso, M. Daoudi, K. Arnaud, S. Cap, Tommaso Colombo, J.-P. Cachemiche, B. Jost, P. Durante, M. Jevaud, R. Le Gac, F. Sborzacchi, C. Faerber, M. Frank, Sebastien Valat, F. Hachon, D. Galli, Balazs Voneki, J. V. Viana Barbosa, Laura Promberger, C. Gaspar, F. Rethore, Daniel Campora, U. Marconi, Colombo, T., Amihalachioaei, A., Arnaud, K., Alessio, F., Brarda, L., Cachemiche, J.-P., Cámpora, D., Cap, S., Cardoso, L., Cindolo, F., Daoudi, M., Durante, P., Duval, P.-Y., Faerber, C., Fernández, P., Frank, M., Galli, D., Gaspar, C., Hachon, F., Jevaud, M., Jost, B., Le Gac, R., Manzali, M., Marconi, U., Mohammed, H., Neufeld, N., Pisani, F., Promberger, L., Quast, C., Réthoré, F., Sborzacchi, F., Schwemmer, R., T'jampens, S., Valat, S., Viana Barbosa, J., Vöneki, B. and Vouters, G., Centre de Physique des Particules de Marseille (CPPM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Aix Marseille Université (AMU), Laboratoire d'Annecy de Physique des Particules (LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Laboratoire d'Annecy de Physique des Particules (LAPP)
- Subjects
Particles and field ,Data acquisition system ,History ,Cover (telecommunications) ,data acquisition ,costs ,Online computing system ,Event-builder ,01 natural sciences ,Education ,Data acquisition ,Component (UML) ,0103 physical sciences ,Off the shelf ,Physic ,[INFO]Computer Science [cs] ,Electronics ,[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] ,Detectors and Experimental Techniques ,010306 general physics ,activity report ,Rest (physics) ,Large Hadron Collider ,010308 nuclear & particles physics ,business.industry ,electronics ,LHC-B ,HEP ,Computer Science Applications ,Computing and Computers ,LHCb ,Trigger ,electronics: readout ,Systems design ,LHC ,trigger: hardware ,business ,Computer hardware ,Detector read-out ,electronics: design ,Event filter - Abstract
International audience; The LHCb experiment at CERN has decided to optimise its physics reach by removing the first level hardware trigger for 2020 and beyond. In addition to requiring fully redesigned front-end electronics this design creates interesting challenges for the data-acquisition and the rest of the online computing system. Such a system can only be realized within realistic cost using as much off-the-shelf hardware as possible. Relevant technologies evolve very quickly and thus the system design is architecture-centred and tries to avoid to depend too much on specific technologies. In this paper we describe the design, the motivations for various choices and the current favoured options for the implementation, and the status of the R&D. We will cover the back-end readout, which contains the only custom-made component, the event-building, the event-filter infrastructure, and storage.
- Published
- 2018
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