A1 Journal article (refereed)
Calibration of the photon spectrometer PHOS of the ALICE experiment (2019)

ALICE Collaboration (2019). Calibration of the photon spectrometer PHOS of the ALICE experiment. Journal of Instrumentation, 14, P05025. DOI: 10.1088/1748-0221/14/05/P05025

JYU authors or editors

Publication details

All authors or editors: ALICE Collaboration

Journal or series: Journal of Instrumentation

eISSN: 1748-0221

Publication year: 2019

Volume: 14

Article number: P05025

Publisher: Institute of Physics

Publication country: United Kingdom

Publication language: English

DOI: http://doi.org/10.1088/1748-0221/14/05/P05025

Open Access: Open access publication published in a hybrid channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/65142

Web address of parallel published publication (pre-print): https://arxiv.org/abs/1902.06145


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 root s = 13 TeV. After applying all corrections, the achieved mass resolutions for pi(0) and eta mesons for p(T) > 1.7 GeV/c are sigma(pi 0)(m) = 4.56 +/- 0.03 MeV/c(2) and sigma(eta)(m) = 15.3 +/- 1.0 MeV/c(2), respectively.

Keywords: particle physics; research equipment

Free keywords: calorimeters; detector alignment and calibration methods (lasers, sources, particlebeams)

Contributing organizations

Ministry reporting: Yes

Reporting Year: 2019

JUFO rating: 1

Last updated on 2020-18-08 at 13:28