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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. 相似文献
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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~(1/2)(?)0.28±0.02o 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~(1/2)(?)0.8±0.3o).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. 相似文献