Dead cell and side leakage correction for a lead-scintillating fiber electromagnetic calorimeter

The electromagnetic calorimeter（ECAL） of the Alpha Magnetic Spectrometer（AMS-02） is one of the key detectors for dark matter searches. It measures the energies of electrons, positrons and photons and seperates them from hadrons. Currently, there are 5 dead cells in the ECAL, which affect the reconst...

Full description

Saved in:
Bibliographic Details
Published inChinese physics C Vol. 40; no. 9; pp. 133 - 137
Main Author 张诚 李祖豪 唐志成 Suzan Basegmez du Pree 张劭文 王薛强 杨民 陈国明 陈和生
Format Journal Article
LanguageEnglish
Published 01.09.2016
Subjects
α磁谱仪
校正
正电子
瑞士
电磁量能器
细胞
能量
闪烁光纤
Online AccessGet full text
ISSN1674-1137
0254-3052
DOI10.1088/1674-1137/40/9/096204

Cover

More Information
Summary:The electromagnetic calorimeter（ECAL） of the Alpha Magnetic Spectrometer（AMS-02） is one of the key detectors for dark matter searches. It measures the energies of electrons, positrons and photons and seperates them from hadrons. Currently, there are 5 dead cells in the ECAL, which affect the reconstructed energy of 4.2%of total events in the ECAL acceptance. When an electromagnetic shower axis is close to the ECAL border, due to the side leakage, the reconstructed energy is affected as well. In this paper, methods for dead cells and side leakage corrections for the ECAL energy reconstruction are presented. For events with the shower axis crossing dead cells,applying dead cell correction improves the difference in the reconstructed energy from 12% to 1%, while for events near the ECAL border, with side leakage correction it is improved from 4% to 1%.
Bibliography:Cheng Zhang,Zu-Hao Li, Zhi-Cheng Tang,Suzan Basegmez du Pree, Shao-Wen Zhang, Xue-Qiang Wang,Min Vang, Guo-Ming Chen,He-Sheng Chen（ 1 Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China; 2 University of Chinese Academy of Sciences, Beijing 100049, China）
The electromagnetic calorimeter（ECAL） of the Alpha Magnetic Spectrometer（AMS-02） is one of the key detectors for dark matter searches. It measures the energies of electrons, positrons and photons and seperates them from hadrons. Currently, there are 5 dead cells in the ECAL, which affect the reconstructed energy of 4.2%of total events in the ECAL acceptance. When an electromagnetic shower axis is close to the ECAL border, due to the side leakage, the reconstructed energy is affected as well. In this paper, methods for dead cells and side leakage corrections for the ECAL energy reconstruction are presented. For events with the shower axis crossing dead cells,applying dead cell correction improves the difference in the reconstructed energy from 12% to 1%, while for events near the ECAL border, with side leakage correction it is improved from 4% to 1%.
11-5641/O4
AMS-02, ECAL, dead cell correction, side leakage correction
ISSN:1674-1137
0254-3052
DOI:10.1088/1674-1137/40/9/096204