Abstract—
The electromagnetic calorimeter is an important part of the MPD detector, which helps to study properties of the dense nuclear matter produced in heavy-ion collisions at NICA. The high-granularity electromagnetic calorimeter (ECal) is optimized to measure the spatial coordinates and energy of photons and electrons. The production of the calorimeter modules started this year. This report presents the methods and results of the testing and calibration of the ECal modules. A technique for measuring assemblies of calorimeter modules on cosmic muons was developed, which allows calibrating a large number of modules in a wide dynamic range during a limited time. Periodic quality control measurements and determination of the main physical parameters of modules were proposed to be carried out with an electron beam at various energies. For this purpose, the electron beam of S-25R Pakhra synchrotron of the Lebedev Physics Institute has been proposed. A secondary electron channel was commissioned on the bremsstrahlung photon beam and transported to the calibration area. Simulation programs for the beam and cosmic tests were developed. The experimental results in comparison with simulated data are presented and discussed.
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ACKNOWLEDGMENTS
The authors are grateful to the personnel of the accelerator complex S-25R Pakhra at LPI and members of the MPD collaboration for carrying out calibration measurements.
Funding
This work was supported by grant no. 18-02-40079 from the Russian Foundation for Basic Research.
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Baskov, V.A., Bulychjov, S.A., Krechetov, Y.F. et al. Electron Beam Test of the MPD Electromagnetic Calorimeter on the Pakhra Synchrotron. Phys. Part. Nuclei 52, 663–668 (2021). https://doi.org/10.1134/S1063779621040110
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DOI: https://doi.org/10.1134/S1063779621040110