TY - JOUR
T1 - Calibration of the photon spectrometer PHOS of the ALICE experiment
AU - ALICE Collaboration
AU - Acharya, S.
AU - Andrews, H.A.
AU - Evans, D.
AU - Graham, K.L.
AU - Jevons, O.
AU - Jones, P.G.
AU - Jusko, A.
AU - Krivda, M.
AU - Kvapil, J.
AU - Lietava, R.
AU - Willsher, E.
AU - Zardoshti, N.
PY - 2019/5/28
Y1 - 2019/5/28
N2 - 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 σmπ0 = 4.56 ± 0.03 MeV/c2 and σmη = 15.3 ± 1.0 MeV/c2, respectively.
AB - 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 σmπ0 = 4.56 ± 0.03 MeV/c2 and σmη = 15.3 ± 1.0 MeV/c2, respectively.
KW - calorimeters
KW - detector alignment and calibration methods (lasers, sources, particle-beams))
UR - http://www.scopus.com/inward/record.url?scp=85069544861&partnerID=8YFLogxK
U2 - 10.1088/1748-0221/14/05/p05025
DO - 10.1088/1748-0221/14/05/p05025
M3 - Article
SN - 1748-0221
VL - 14
JO - Journal of Instrumentation
JF - Journal of Instrumentation
IS - 05
M1 - P05025
ER -