Improvement of cosmic-ray proton measurement with the electromagnetic calorimeter of the Alpha Magnetic Spectrometer

被引：0

作者：

Zhao, Fei ^{[1
,2
]}

Tang, Zhi-Cheng ^{[1
]}

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

Zhang, Cheng ^{[1
]}

Sun, Ze-Tong ^{[1
,2
]}

Zhang, Feng-Ze ^{[1
,2
]}

Hu, Jia-Yu ^{[1
,2
]}

Chen, Guo-Ming ^{[1
,2
]}

Chen, He-Sheng ^{[1
,2
]}

机构：

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

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

来源：

RADIATION DETECTION TECHNOLOGY AND METHODS | 2021年 / 5卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Cosmic rays; Proton spectrum; Electromagnetic calorimeter; Monte Carlo simulation;

D O I：

10.1007/s41605-020-00222-9

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

Purpose The energy response of protons measured by electromagnetic calorimeter (ECAL) of Alpha Magnetic Spectrometer (AMS-02) shows disagreement between Monte Carlo (MC) simulation and data. Therefore, using the response matrix from MC to apply the energy unfolding, which is crucial for cosmic-ray proton spectrum measurement, is unreliable. As a result, cosmic-ray proton spectrum measured by ECAL based on raw MC would be different from the published results (based on the momentum measurement) by AMS-02. The purpose is tuning the response matrix to agree with data. Methods The independent energy measurement by AMS-02 magnetic spectrometer provides in-flight calibration for ECAL. The distributions of proton energy measured by ECAL in MC are corrected after the calibration. Results The proton spectrum based on the tuned response matrix is consistent with the published one. Conclusions The matrix tuning is effective for the energy unfolding for cosmic-ray proton spectrum measurement.

引用

页码：90 / 94

页数：5

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