Calibration of the photon spectrometer PHOS of the ALICE experiment
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The ALICE Collaboration , Acharya , S , Brucken , E J , Chang , B , Hilden , T E , Kim , D J , Litichevskyi , V , Mieskolainen , M M , Orava , R , Parkkila , J E , Rak , J , Räsänen , S S , Saarinen , S , Slupecki , M , Snellman , T W , Trzaska , W H , Vargyas , M & Viinikainen , J 2019 , ' Calibration of the photon spectrometer PHOS of the ALICE experiment ' , Journal of Instrumentation , vol. 14 , P05025 . https://doi.org/10.1088/1748-0221/14/05/P05025
| Title: | Calibration of the photon spectrometer PHOS of the ALICE experiment |
| Author: | The ALICE collaboration; Acharya, S.; Brucken, E. J.; Chang, B.; Hilden, T. E.; Kim, D. J.; Litichevskyi, V.; Mieskolainen, M. M.; Orava, R.; Parkkila, J. E.; Rak, J.; Räsänen, S. S.; Saarinen, S.; Slupecki, M.; Snellman, T. W.; Trzaska, W. H.; Vargyas, M.; Viinikainen, J. |
| Other contributor: |
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, University of Jyväskylä University of Helsinki, Helsinki Institute of Physics University of Helsinki, University of Jyväskylä University of Helsinki, Helsinki Institute of Physics University of Helsinki, Helsinki Institute of Physics University of Helsinki, Helsinki Institute of Physics University of Helsinki, University of Jyväskylä University of Helsinki, University of Jyväskylä University of Helsinki, Helsinki Institute of Physics University of Helsinki, University of Jyväskylä University of Helsinki, University of Jyväskylä University of Helsinki, University of Jyväskylä |
| Date: | 2019-05 |
| Language: | eng |
| Number of pages: | 30 |
| Belongs to series: | Journal of Instrumentation |
| ISSN: | 1748-0221 |
| DOI: | https://doi.org/10.1088/1748-0221/14/05/P05025 |
| URI: | http://hdl.handle.net/10138/303461 |
| Abstract: | 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. |
| Subject: |
Calorimeters
Detector alignment and calibration methods (lasers, sources, particlebeams) PB-PB COLLISIONS PHOTODIODES DETECTOR 114 Physical sciences |
| Rights: |
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