Angular reconstruction of a lead scintillating-fiber sandwiched electromagnetic calorimeter

被引：5

作者：

Li Zu-Hao ^{[1
]}

Xu Wei-Wei ^{[1
]}

Wang Ling-Yu ^{[1
]}

Zhang Cheng ^{[1
]}

Tang Zhi-Cheng ^{[1
]}

Yan Qi ^{[1
]}

Yang Min ^{[1
]}

Lu Yu-Sheng ^{[1
]}

Chen Guo-Ming ^{[1
]}

Chen He-Sheng ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China

来源：

CHINESE PHYSICS C | 2014年 / 38卷 / 05期

基金：

美国国家科学基金会;

关键词：

electromagnetic calorimeter; angular resolution; lateral fit; Neighbor Cell Deposited Energy Ratio; ALPHA-MAGNETIC SPECTROMETER;

D O I：

10.1088/1674-1137/38/5/056203

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

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 degrees/root E circle plus 0.28 +/- 0.02 degrees 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 degrees/root E circle plus 0.8 +/- 0.3 degrees). 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.

引用

页数：6

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