Angular reconstruction of a lead scintillating-fiber sandwiched electromagnetic calorimeter

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LI Zu-Hao, XU Wei-Wei, WANG Ling-Yu, ZHANG Cheng, TANG Zhi-Cheng, YAN Qi, YANG Min, LÜ Yu-Sheng, CHEN Guo-Ming and CHEN He-Sheng. Angular reconstruction of a lead scintillating-fiber sandwiched electromagnetic calorimeter[J]. Chinese Physics C, 2014, 38(5): 056203. doi: 10.1088/1674-1137/38/5/056203
LI Zu-Hao, XU Wei-Wei, WANG Ling-Yu, ZHANG Cheng, TANG Zhi-Cheng, YAN Qi, YANG Min, LÜ Yu-Sheng, CHEN Guo-Ming and CHEN He-Sheng. Angular reconstruction of a lead scintillating-fiber sandwiched electromagnetic calorimeter[J]. Chinese Physics C, 2014, 38(5): 056203.  doi: 10.1088/1674-1137/38/5/056203 shu
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Received: 2013-07-04
Revised: 2013-08-20
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Angular reconstruction of a lead scintillating-fiber sandwiched electromagnetic calorimeter

    Corresponding author: LI Zu-Hao,

Abstract: The Neighbor Cell Deposited Energy Ratio (NCDER) is a new method that is proposed to reconstruct incidence position in a single layer for a 3-dimensional imaging electromagnetic calorimeter (ECAL). This method was applied to reconstruct the ECAL test beam data for the Alpha Magnetic Spectrometer-02 (AMS-02). The results show that this method can achieve an angular resolution of 7.36±0.08°/√E⊕0.28±0.02° in the determination of the photon's direction, which is much more precise than that obtained with the commonly-adopted Center of Gravity (COG) method (8.4±0.1°/√E⊕0.8±0.3°). Furthermore, since it uses only the properties of electromagnetic showers, this new method could also be used for other type of fine grain sampling calorimeters.

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