Abstract
Purpose
Performing precision equalization on the low-response detection units of electromagnetic calorimeter (ECAL), it is essential for precision energy measurements of Alpha Magnetic Spectrometer (AMS-02).
Methods
Cosmic helium nuclei are used instead of protons to perform the equalization. During the equalization, temperature effects are analyzed and corrected to improve the accuracy.
Results
The results of helium equalization are consistent with proton equalization, and the precision of helium equalization is about 1.5%.
Conclusions
The precision of helium equalization is better than that of proton equalization, which provides a reliable alternative to ECAL on-orbit equalization.
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Acknowledgements
The project is supported by National Key Research and Development Program of China(2022YFA1604802), National Natural Science Foundation of China(11905238).
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Hu, JY., Sun, ZT., Li, ZH. et al. Equalization for the low-response cells of the AMS-02 electromagnetic calorimeter. Radiat Detect Technol Methods 7, 350–354 (2023). https://doi.org/10.1007/s41605-023-00408-x
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DOI: https://doi.org/10.1007/s41605-023-00408-x