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Test beam characterization of sensor prototypes for the CMS Barrel MIP Timing Detector

Journal Article · · JINST
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  1. Caltech
  2. Kansas U.
  3. Princeton U.
  4. Iowa U.
  5. Virginia U.
  6. Moscow, INR
  7. Fermilab
  8. TERA, Novara; INFN, Turin
  9. CERN
  10. LIP, Lisbon
  11. INFN, Turin; Turin U.
  12. INFN, Padua
  13. INFN, Milan Bicocca
  14. IRFU, Saclay
  15. Helsinki Inst. of Phys.
  16. UC, Santa Barbara
  17. INFN, Rome; U. Rome La Sapienza (main)
  18. INFN, Padua; Padua U.
  19. INFN, Milan Bicocca; Milan Bicocca U.
  20. INFN, Turin
  21. INFN, Trieste
  22. INFN, Rome
  23. Zurich, ETH
  24. Kyungpook Natl. U.
  25. Nebraska U.
  26. Cantabria Inst. of Phys.
  27. Rice U.
  28. Milan Bicocca U.; CERN
  29. Boston U.
  30. Notre Dame U.
  31. Kansas State U.
  32. Notre Dame U.; Moscow, INR
  33. Minsk, Inst. Nucl. Problems
  34. Novosibirsk State U.
  35. Northeastern U.
  36. INFN, Genoa; Genoa U.
  37. Vilnius U.
  38. Illinois U., Chicago
  39. Fermilab; Caltech
  40. INFN, Genoa
  41. INFN, Trieste; Trieste U.
  42. KLTE-ATOMKI
  43. Fairfield U.
+ Show Author Affiliations
The MIP Timing Detector will provide additional timing capabilities for detection of minimum ionizing particles (MIPs) at CMS during the High Luminosity LHC era, improving event reconstruction and pileup rejection. The central portion of the detector, the Barrel Timing Layer (BTL), will be instrumented with LYSO:Ce crystals and Silicon Photomultipliers (SiPMs) providing a time resolution of about 30 ps at the beginning of operation, and degrading to 50-60 ps at the end of the detector lifetime as a result of radiation damage. In this work, we present the results obtained using a 120 GeV proton beam at the Fermilab Test Beam Facility to measure the time resolution of unirradiated sensors. A proof-of-concept of the sensor layout proposed for the barrel region of the MTD, consisting of elongated crystal bars with dimensions of about 3×3×57 mm3 and with double-ended SiPM readout, is demonstrated. This design provides a robust time measurement independent of the impact point of the MIP along the crystal bar. We tested LYSO:Ce bars of different thickness (2, 3, 4 mm) with a geometry close to the reference design and coupled to SiPMs manufactured by Hamamatsu and Fondazione Bruno Kessler. The various aspects influencing the timing performance such as the crystal thickness, properties of the SiPMs (e.g. photon detection efficiency), and impact angle of the MIP are studied. A time resolution of about 28 ps is measured for MIPs crossing a 3 mm thick crystal bar, corresponding to a most probable value (MPV) of energy deposition of 2.6 MeV, and of 22 ps for the 4.2 MeV MPV energy deposition expected in the BTL, matching the detector performance target for unirradiated devices.
Research Organization:
Boston U.; CERN; Caltech; Cantabria Inst. of Phys.; Fairfield U.; Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Genoa U.; Helsinki Inst. of Phys.; INFN, Genoa; INFN, Milan Bicocca; INFN, Padua; INFN, Rome; INFN, Trieste; INFN, Turin; IRFU, Saclay; Illinois U., Chicago; Iowa U.; KLTE-ATOMKI; Kansas State U.; Kansas U.; Kyungpook Natl. U.; LIP, Lisbon; Milan Bicocca U.; Minsk, Inst. Nucl. Problems; Moscow, INR; Nebraska U.; Northeastern U.; Notre Dame U.; Novosibirsk State U.; Padua U.; Princeton U.; Rice U.; TERA, Novara; Trieste U.; Turin U.; U. Rome La Sapienza (main); UC, Santa Barbara; Vilnius U.; Virginia U.; Zurich, ETH
Sponsoring Organization:
US Department of Energy
Grant/Contract Number:
AC02-07CH11359
OSTI ID:
1830380
Alternate ID(s):
OSTI ID: 23163793
Report Number(s):
FERMILAB-PUB-21-423-CMS; oai:inspirehep.net:1858929; arXiv:2104.07786
Journal Information:
JINST, Journal Name: JINST Journal Issue: 07 Vol. 16
Country of Publication:
United States
Language:
English

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Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
Scintillators
Photon detectors (SiPM)
Timing detectors