Correction of PMT position effect for a lead-scintillating fiber electromagnetic calorimeter

被引：34

作者：

Li Zu-Hao ^{[1
,2
]}

Wang Ling-Yu ^{[1
]}

Xu Wei-Wei ^{[1
,2
]}

Chen Guo-Ming ^{[1
]}

Lu Yu-Sheng ^{[1
]}

Chen He-Sheng ^{[1
]}

机构：

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

[2] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

来源：

CHINESE PHYSICS C | 2013年 / 37卷 / 02期

基金：

中国国家自然科学基金;

关键词：

electromagnetic calorimeter; photo multiplier tube; position effect; energy resolution;

D O I：

10.1088/1674-1137/37/2/026201

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 position effect of the photoelectron multiplier tube (PMT) of the electromagnetic calorimeter (ECAL) of Alpha Magnetic Spectrometer-02 (AMS-02) has been studied with beam-test data. The reconstructed deposited energy in a layer versus incidence position in the cell can be described by Gaussian distribution, maximum and minimum value can be obtained when the particle passes across the center and the edge of a cell respectively. The distribution can be used to correct the effect of incidence position on energy reconstruction. Much better energy resolution was acquired be got with the correction, for 100 GeV electrons, energy resolution improved from 3% to 2%.

引用

页数：4

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