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

LI Zu-Hao; WANG Ling-Yu; XU Wei-Wei; CHEN Guo-Ming; CHEN He-Sheng

doi:10.1088/1674-1137/37/2/026201

Chinese Physics C> 2013, Vol. 37> Issue(2) : 026201 DOI: 10.1088/1674-1137/37/2/026201

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

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Abstract：
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%.

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LI Zu-Hao, WANG Ling-Yu, XU Wei-Wei, CHEN Guo-Ming, CHEN He-Sheng and Correction of PMT position effect for a lead-scintillating fiber electromagnetic calorimeter[J]. Chinese Physics C, 2013, 37(2): 026201. doi: 10.1088/1674-1137/37/2/026201

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Received: 2012-03-06
Revised: 2012-03-26

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

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

Corresponding author: LI Zu-Hao,

Received Date: 2012-03-06

Accepted Date: 2012-03-26

Available Online: 2013-02-05

Abstract: 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%.

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

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