Abstract—
The time and energy resolutions were measured for four prototypes of the PHOS electromagnetic calorimeter for the ALICE experiment at the Large Hadron Collider at CERN. Each prototype was made up of nine identical detection elements assembled as a 3 × 3 array. The detection element was based on a lead tungstate (PbWO4) scintillating crystal with a length of 180 mm and a cross section of 22 × 22 mm2, which was viewed from its end face by a photodetector. Avalanche photodiodes and silicon photomultipliers with different active areas (Hamamatsu, Japan) were used as photodetectors. The measurements were made with the electron component of secondary particle beams of the PS proton synchrotron at CERN in the momentum range of 1−10 GeV/c at a temperature of 17.5°C.
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ACKNOWLEDGMENTS
We express our gratitude to the employees at the accelerator department of CERN for providing undisturbed operation of the PS accelerator and the T9 secondary beamline. We express our gratitude to our colleagues in the ALICE experiment for their support and useful discussions of the results, to colleagues from the Kurchatov Institute National Research Centre for the useful comments in the discussion of the presented experimental results.
We also thank our colleagues from the electronics department of the Laboratory of High Energies at JINR for upgrading the TQDC unit to meet our requirements and for helping us to adjust and launch this unit.
Funding
This work was supported by the Kurchatov Institute National Research Centre, order no. 2767 dated October 28, 2021.
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Translated by N. Goryacheva
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Akindinov, A.V., Balygin, K.A., Grishuk, Y.V. et al. Time and Energy Resolutions of Electromagnetic Calorimeter Prototypes Based on Lead Tungstate Crystals. Instrum Exp Tech 66, 207–217 (2023). https://doi.org/10.1134/S0020441223010037
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DOI: https://doi.org/10.1134/S0020441223010037