Chinese Physics C > 2016, Vol. 40 > Issue(9): 096204 DOI: 10.1088/1674-1137/40/9/096204

Dead cell and side leakage correction for a lead-scintillating fiber electromagnetic calorimeter

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Abstract：
The electromagnetic calorimeter (ECAL) of the Alpha Magnetic Spectrometer (AMS-02) is one of the key detectors for dark matter searches. It measures the energies of electrons, positrons and photons and seperates them from hadrons. Currently, there are 5 dead cells in the ECAL, which affect the reconstructed energy of 4.2% of total events in the ECAL acceptance. When an electromagnetic shower axis is close to the ECAL border, due to the side leakage, the reconstructed energy is affected as well. In this paper, methods for dead cells and side leakage corrections for the ECAL energy reconstruction are presented. For events with the shower axis crossing dead cells, applying dead cell correction improves the difference in the reconstructed energy from 12% to 1%, while for events near the ECAL border, with side leakage correction it is improved from 4% to 1%.
- AMS-02,
- ECAL,
- dead cell correction,
- side leakage correction

References

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Cheng Zhang, Zu-Hao Li, Zhi-Cheng Tang, Suzan Basegmez du Pree, Shao-Wen Zhang, Xue-Qiang Wang, Min Yang, Guo-Ming Chen and He-Sheng Chen. Dead cell and side leakage correction for a lead-scintillating fiber electromagnetic calorimeter[J]. Chinese Physics C, 2016, 40(9): 096204. doi: 10.1088/1674-1137/40/9/096204

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Received: 2016-03-14

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Supported by National Natural Science Foundation of China(11220101004)

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通讯作者:陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Dead cell and side leakage correction for a lead-scintillating fiber electromagnetic calorimeter

Corresponding author:Zu-Hao Li,

Received Date:2016-03-14

Available Online:2016-09-05

Fund Project:Supported by National Natural Science Foundation of China(11220101004)

Abstract:The electromagnetic calorimeter (ECAL) of the Alpha Magnetic Spectrometer (AMS-02) is one of the key detectors for dark matter searches. It measures the energies of electrons, positrons and photons and seperates them from hadrons. Currently, there are 5 dead cells in the ECAL, which affect the reconstructed energy of 4.2% of total events in the ECAL acceptance. When an electromagnetic shower axis is close to the ECAL border, due to the side leakage, the reconstructed energy is affected as well. In this paper, methods for dead cells and side leakage corrections for the ECAL energy reconstruction are presented. For events with the shower axis crossing dead cells, applying dead cell correction improves the difference in the reconstructed energy from 12% to 1%, while for events near the ECAL border, with side leakage correction it is improved from 4% to 1%.

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Dead cell and side leakage correction for a lead-scintillating fiber electromagnetic calorimeter

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通讯作者:陈斌, bchen63@163.com

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