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Cosmic-ray helium nuclei measurement with the calorimeter of the Alpha Magnetic Spectrometer

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Abstract

Purpose

The distributions of energy responses of helium measured by the electromagnetic calorimeter (ECAL) of Alpha Magnetic Spectrometer (AMS-02) in Monte-Carlo do not agree with those in real data, thus using energy response matrix obtained from Monte-Carlo to measure the cosmic ray helium spectrum is not correct. Therefore, the spectrum measured with ECAL based on raw Monte-Carlo would be different from the real one. The purpose is to correct the response matrix to measure helium spectrum with ECAL.

Methods

The energy measured by ECAL of AMS-02 provides in-flight correction for the energy response matrix in Monte-Carlo.

Results

The spectrum based on corrected response matrix is consistent with the AMS collaboration published result.

Conclusions

It is feasible to measure helium spectrum with ECAL with corrected energy response matrix.

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Funding

The funding was provided by China Sponsorship Council (Grant Number: 202004910534).

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Authors and Affiliations

  1. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China

    Feng-ze Zhang, Zhi-Cheng Tang, Zu-Hao Li, Cheng Zhang, Ze-Tong Sun, Jia-Yu Hu, Shang-Lin Li, Guo-Ming Chen & He-Sheng Chen

  2. University of Chinese Academy of Sciences, Beijing, 100049, China

    Feng-ze Zhang, Zu-Hao Li, Jia-Yu Hu, Shang-Lin Li, Guo-Ming Chen & He-Sheng Chen

Authors
  1. Feng-ze Zhang
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  2. Zhi-Cheng Tang
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  3. Zu-Hao Li
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  4. Cheng Zhang
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  5. Ze-Tong Sun
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  6. Jia-Yu Hu
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  7. Shang-Lin Li
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  8. Guo-Ming Chen
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  9. He-Sheng Chen
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Corresponding author

Correspondence to Zu-Hao Li.

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Zhang, Fz., Tang, ZC., Li, ZH. et al. Cosmic-ray helium nuclei measurement with the calorimeter of the Alpha Magnetic Spectrometer. Radiat Detect Technol Methods 6, 427–432 (2022). https://doi.org/10.1007/s41605-022-00336-2

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  • DOI: https://doi.org/10.1007/s41605-022-00336-2

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