Angular reconstruction of a lead scintillating-fiber sandwiched electromagnetic calorimeter

【摘要】 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.更多还原

【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^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.更多还原