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arXiv · 1308.5564

Angular Reconstruction of a Lead Scintillating-Fiber Sandwiched Electromagnetic Calorimeter

Zu-Hao Li·Wei-Wei Xu·Ling-Yu Wang·Cheng Zhang·Zhi-Cheng Tang·Qi Yan·Min Yang·Yu-Sheng Lu·Guo-Ming Chen·He-Sheng Chen
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Abstract

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.

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Zu-Hao Li, Wei-Wei Xu, Ling-Yu Wang, Cheng Zhang, Zhi-Cheng Tang, Qi Yan, Min Yang, Yu-Sheng Lu, Guo-Ming Chen, He-Sheng Chen. 2013-08-26. Angular Reconstruction of a Lead Scintillating-Fiber Sandwiched Electromagnetic Calorimeter. https://doi.org/10.1088/1674-1137%2F38%2F5%2F056203

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