4.3 Article

Performance of the ALICE VZERO system

Journal

JOURNAL OF INSTRUMENTATION
Volume 8, Issue -, Pages -

Publisher

IOP PUBLISHING LTD
DOI: 10.1088/1748-0221/8/10/P10016

Keywords

Large detector-systems performance; Trigger detectors; Large detector systems for particle and astroparticle physics; Heavy-ion detectors

Funding

  1. State Committee of Science
  2. World Federation of Scientists (WFS)
  3. Swiss Fonds Kidagan, Armenia
  4. Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
  5. Financiadora de Estudos e Projetos (FINEP)
  6. Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP)
  7. National Natural Science Foundation of China (NSFC)
  8. Chinese Ministry of Education (CMOE)
  9. Ministry of Science and Technology of China (MSTC)
  10. Ministry of Education and Youth of the Czech Republic
  11. Danish Natural Science Research Council
  12. Carlsberg Foundation
  13. Danish National Research Foundation
  14. European Research Council under the European Community
  15. Helsinki Institute of Physics
  16. Academy of Finland
  17. French CNRS-IN2P3
  18. 'Region Pays de Loire'
  19. 'Region Alsace'
  20. 'Region Auvergne'
  21. CEA, France
  22. German BMBF
  23. Helmholtz Association
  24. General Secretariat for Research and Technology, Ministry of Development, Greece
  25. Hungarian OTKA
  26. National Office for Research and Technology (NKTH)
  27. Department of Atomic Energy
  28. Department of Science and Technology of the Government of India
  29. Istituto Nazionale di Fisica Nucleare (INFN)
  30. Centro Fermi - Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi, Italy
  31. MEXT Grant-in-Aid for Specially Promoted Research, Japan
  32. Joint Institute for Nuclear Research, Dubna
  33. National Research Foundation of Korea (NRF)
  34. KICOS
  35. CONACYT
  36. DGAPA, Mexico
  37. ALFA-EC
  38. EPLANET Program (European Particle Physics Latin American Network) Stichting voor Fundamenteel Onderzoek der Materie (FOM)
  39. Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO), Netherlands
  40. Research Council of Norway (NFR)
  41. Polish Ministry of Science and Higher Education
  42. National Authority for Scientific Research - NASR (Autoritatea Nationala pentru Cercetare Stiintifica - ANCS)
  43. Ministry of Education and Science of Russian Federation
  44. Russian Academy of Sciences
  45. Russian Federal Agency of Atomic Energy
  46. Russian Federal Agency for Science and Innovations
  47. Russian Foundation for Basic Research
  48. Ministry of Education of Slovakia
  49. Department of Science and Technology, South Africa
  50. CIEMAT
  51. EELA
  52. Ministerio de Economia y Competitividad (MINECO) of Spain
  53. Xunta de Galicia (Conselleria de Educacion)
  54. CEADEN
  55. Cubaenergia, Cuba
  56. IAEA (International Atomic Energy Agency)
  57. Swedish Research Council (VR)
  58. Knut & Alice Wallenberg Foundation (KAW)
  59. Ukraine Ministry of Education and Science
  60. United Kingdom Science and Technology Facilities Council (STFC)
  61. United States Department of Energy
  62. United States National Science Foundation
  63. State of Texas
  64. State of Ohio
  65. STFC [ST/J000094/1, ST/G008833/1, ST/J000140/1, ST/I003398/1, ST/J000108/1] Funding Source: UKRI
  66. Science and Technology Facilities Council [ST/I003398/1, ST/J000140/1, 1231104, ST/J000094/1, ST/J000108/1, ST/G008833/1] Funding Source: researchfish
  67. Division Of Physics
  68. Direct For Mathematical & Physical Scien [1307461] Funding Source: National Science Foundation
  69. Grants-in-Aid for Scientific Research [25287048, 23340074] Funding Source: KAKEN

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ALICE is an LHC experiment devoted to the study of strongly interacting matter in proton-proton, proton-nucleus and nucleus-nucleus collisions at ultra-relativistic energies. The ALICE VZERO system, made of two scintillator arrays at asymmetric positions, one on each side of the interaction point, plays a central role in ALICE. In addition to its core function as a trigger source, the VZERO system is used to monitor LHC beam conditions, to reject beam-induced backgrounds and to measure basic physics quantities such as luminosity, particle multiplicity, centrality and event plane direction in nucleus-nucleus collisions. After describing the VZERO system, this publication presents its performance over more than four years of operation at the LHC.

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