Open AccessCalibration of the ALICE PHOS calorimeter
Author(s) -
D. Blau
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1390/1/012113
Subject(s) - calibration , physics , proton , calorimeter (particle physics) , alice (programming language) , energy (signal processing) , analytical chemistry (journal) , nuclear physics , optics , chemistry , computer science , detector , quantum mechanics , programming language , chromatography
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 estimate the geometrical alignment and the corresponding correction of the absolute energy scale, to evaluate the non-linearity 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 widths of π 0 and η meson peaks at p T > 1.7 GeV/c σ π 0 = 4.51 ± 0.03 MeV/c 2 and σ η = 15.3 ± 1.0 MeV/c 2 , respectively, were achieved.