%0 Journal Article
%T Angular Reconstruction of a Lead Scintillating-Fiber Sandwiched Electromagnetic Calorimeter
%A Zu-Hao Li
%A Wei-Wei Xu
%A Ling-Yu Wang
%A Cheng Zhang
%A Zhi-Cheng Tang
%A Qi Yan
%A Min Yang
%A Yu-Sheng Lu
%A Guo-Ming Chen
%A He-Sheng Chen
%J Physics
%D 2013
%I arXiv
%R 10.1088/1674-1137/38/5/056203
%X A new method called Neighbor Cell Deposited Energy Ratio (NCDER) 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\pm 0.08 / \sqrt(E) \oplus 0.28 \pm 0.02 degree in the determination of the photons direction, which is much more precise than that obtained with the commonly-adopted Center of Gravity(COG) method (8.4 \pm 0.1 /sqrt(E) \oplus 0.8\pm0.3 degree). 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.
%U http://arxiv.org/abs/1308.5564v1