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David Silvermyr

David Silvermyr

Senior lecturer

David Silvermyr

Calibration of the photon spectrometer PHOS of the ALICE experiment

Author

  • S Acharya
  • Jonatan Adolfsson
  • Peter Christiansen
  • Martin Ljunggren
  • Adrian Nassirpour
  • Anders Oskarsson
  • Tuva Richert
  • Omar Vazquez Rueda
  • David Silvermyr
  • Evert Stenlund
  • N Zurlo

Summary, in English

The procedure for the energy calibration of the high granularity electromagnetic calorimeter PHOS of the ALICE experiment is presented. The methods used to perform the relative gain calibration, to evaluate the geometrical alignment and the corresponding correction of the absolute energy scale, to obtain the nonlinearity correction coefficients and finally, to calculate the time-dependent calibration corrections, are discussed and illustrated by the PHOS performance in proton-proton (pp) collisions at s=13 TeV. After applying all corrections, the achieved mass resolutions for π0 and η mesons for pT > 1.7 GeV/c are σm π0 = 4.56 ± 0.03 MeV/c2 and σm η = 15.3 ± 1.0 MeV/c2, respectively.

Department/s

  • Particle and nuclear physics
  • eSSENCE: The e-Science Collaboration

Publishing year

2019-05-28

Language

English

Publication/Series

Journal of Instrumentation

Volume

14

Issue

May 2019

Document type

Journal article

Publisher

IOP Publishing

Topic

  • Subatomic Physics

Keywords

  • Instruments
  • Electromagnetic calorimeter
  • Energy calibration
  • Gain calibration
  • High granularity
  • Mass resolution
  • Nonlinearity correction
  • Photon spectrometer
  • Time dependent
  • Calibration

Status

Published

ISBN/ISSN/Other

  • ISSN: 1748-0221