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Published January 1, 2024 | Version v1
Journal article Open

Timing performance of the CMS High Granularity Calorimeter prototype

Creators

  • 1. Bogazici Univ, TR-34342 Istanbul, Turkiye
  • 2. Georgian Tech Univ, 77 Kostava Str 0175, Tbilisi, Georgia
  • 3. Natl Cent Univ Taipei NCU, 300 Jhongda Rd, Jhongli 32001, Taiwan
  • 4. Int Intergovt Org Joint Inst Nucl Res JINR, 6 Joliot Curie St, Moscow 141980, Russia
  • 5. Texas Tech Univ, Lubbock, TX 79409 USA
  • 6. CERN, Espl Particules 1, CH-1211 Geneva 23, Switzerland
  • 7. Univ Iowa, 203 Van Allen Hall, Iowa City, IA 52242 USA
  • 8. Carnegie Mellon Univ, 5000 Forbes Ave, Pittsburgh, PA 15213 USA
  • 9. Indian Inst Sci Educ & Res, Dr Homi Bhabha Rd, Pune 411008, Maharashtra, India
  • 10. Brown Univ, 182 Hope St, Providence, RI 02912 USA
  • 11. Fermilab Natl Accelerator Lab, Wilson Rd, Batavia, IL 60510 USA
  • 12. Cukurova Univ, TR-01330 Adana, Turkiye
  • 13. Russian Acad Sci, Inst Nucl Res, 60th Oct Anniversary Prospekt 7A, Moscow 117312, Russia
  • 14. Deutsch Elektronen Synchrotron DESY, Notkestr 85, D-22607 Hamburg, Germany
  • 15. Univ Maryland, College Pk, MD 20742 USA
  • 16. Natl Tech Univ Athens, Heroon Polytechneiou St, Athens 15780, Greece

Description

This paper describes the experience with the calibration, reconstruction and evaluation of the timing capabilities of the CMS HGCAL prototype in the beam tests in 2018. The calibration procedure includes multiple steps and corrections ranging from tens of nanoseconds to a few hundred picoseconds. The timing performance is studied using signals from positron beam particles with energies between 20 GeV and 300 GeV. The performance is studied as a function of particle energy against an external timing reference as well as standalone by comparing the two different halves of the prototype. The timing resolution is found to be 60 ps for single-channel measurements and better than 20 ps for full showers at the highest energies, setting excellent perspectives for the HGCAL calorimeter performance at the HL-LHC.

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