期刊
JOURNAL OF INSTRUMENTATION
卷 12, 期 -, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1748-0221/12/01/P01020
关键词
Trigger concepts and systems (hardware and software); Trigger detectors; Data acquisition circuits
资金
- Austrian Federal Ministry of Science, Research and Economy
- Austrian Science Fund
- Belgian Fonds de la Recherche Scientifique
- Fonds voor Wetenschappelijk Onderzoek
- CNPq
- CAPES
- FAPERJ
- FAPESP
- Bulgarian Ministry of Education and Science
- CERN
- Chinese Academy of Sciences
- Ministry of Science and Technology
- National Natural Science Foundation of China
- Colombian Funding Agency (COLCIENCIAS)
- Croatian Ministry of Science, Education and Sport
- Croatian Science Foundation
- Research Promotion Foundation, Cyprus
- Secretariat for Higher Education, Science, Technology and Innovation, Ecuador
- Ministry of Education and Research, Estonian Research Council [IUT23-4, IUT23-6]
- European Regional Development Fund, Estonia
- Academy of Finland
- Helsinki Institute of Physics
- Institut National de Physique Nucleaire et de Physique des Particules / CNRS, France
- Commissariat a l'Energie Atomique et aux Energies Alternatives / CEA, France
- Bundesministerium fur Bildung und Forschung, Germany
- Deutsche Forschungsgemeinschaft, Germany
- Helmholtz-Gemeinschaft Deutscher Forschungszentren, Germany
- National Scientific Research Foundation
- National Innovation Office, Hungary
- Department of Atomic Energy
- Department of Science and Technology, India
- Institute for Studies in Theoretical Physics and Mathematics, Iran
- Science Foundation, Ireland
- Istituto Nazionale di Fisica Nucleare, Italy
- Ministry of Science, ICT and Future Planning, and National Research Foundation (NRF), Republic of Korea
- Lithuanian Academy of Sciences
- Ministry of Education, and University of Malaya (Malaysia)
- Mexican Funding Agency (BUAP)
- Mexican Funding Agency (CINVESTAV)
- Mexican Funding Agency (CONACYT)
- Mexican Funding Agency (LNS)
- Mexican Funding Agency (SEP)
- Mexican Funding Agency (UASLP-FAI)
- Ministry of Business, Innovation and Employment, New Zealand
- Pakistan Atomic Energy Commission
- Ministry of Science and Higher Education
- National Science Centre, Poland
- Fundacao para a Ciencia e a Tecnologia, Portugal
- JINR, Dubna
- Ministry of Education and Science of the Russian Federation
- Federal Agency of Atomic Energy of the Russian Federation
- Russian Academy of Sciences
- Russian Foundation for Basic Research
- the Ministry of Education, Science and Technological Development of Serbia
- Secretaria de Estado de Investigacion, Desarrollo e Innovacion and Programa Consolider-Ingenio, Spain
- Swiss Funding Agency (ETH Board)
- Swiss Funding Agency (ETH Zurich)
- Swiss Funding Agency (PSI)
- Swiss Funding Agency (SNF)
- Swiss Funding Agency (UniZH)
- Swiss Funding Agency (Canton Zurich)
- Swiss Funding Agency (SER)
- Ministry of Science and Technology, Taipei
- Thailand Center of Excellence in Physics
- Institute for the Promotion of Teaching Science and Technology of Thailand
- Special Task Force for Activating Research
- National Science and Technology Development Agency of Thailand
- Scientific and Technical Research Council of Turkey
- Turkish Atomic Energy Authority
- National Academy of Sciences of Ukraine, Ukraine
- State Fund for Fundamental Researches, Ukraine
- Science and Technology Facilities Council, U.K.
- US Department of Energy
- US National Science Foundation
- Science and Technology Facilities Council [CMS, GRIDPP, ST/N000250/1, ST/K001256/1] Funding Source: researchfish
- Division Of Physics
- Direct For Mathematical & Physical Scien [1606321, 1624356] Funding Source: National Science Foundation
- Division Of Physics
- Direct For Mathematical & Physical Scien [1506130, 1151640, 1211067, 1506168, 1508869] Funding Source: National Science Foundation
This paper describes the CMS trigger system and its performance during Run 1 of the LHC. The trigger system consists of two levels designed to select events of potential physics interest from a GHz (MHz) interaction rate of proton-proton (heavy ion) collisions. The first level of the trigger is implemented in hardware, and selects events containing detector signals consistent with an electron, photon, muon, tau lepton, jet, or missing transverse energy. A programmable menu of up to 128 object-based algorithms is used to select events for subsequent processing. The trigger thresholds are adjusted to the LHC instantaneous luminosity during data taking in order to restrict the output rate to 100 kHz, the upper limit imposed by the CMS readout electronics. The second level, implemented in software, further refines the purity of the output stream, selecting an average rate of 400 Hz for offline event storage. The objectives, strategy and performance of the trigger system during the LHC Run 1 are described.
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