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Time calibration of barrel TOF system at BESIII

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Abstract

Purpose

In the BESIII experiment, a conventional least square method is currently used to calibrate the time-of-flight (TOF) system, aiming to achieve optimal time resolution. However, it is intricate for conventional methods to handle electronics saturation and boundary effect which affect the time resolution.

Methods

A novel method based on machine learning techniques for time calibration of barrel TOF system is implemented in this paper.

Results and conclusion

With the application of boosted decision tree (BDT) algorithm, the overall time resolution of barrel TOF is found to be 64 ps. Compared with conventional method, a notable improvement in time resolution is achieved in the boundary range of the scintillator bar using BDT method.

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Acknowledgements

This work is supported in part by National Key R &D Program of China under Contracts No. 2020YFA0406304.

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Authors and Affiliations

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

    Zhengyuan Chen, Shengsen Sun, Huaimin Liu, Ziyan Deng, Gang Li, Shuopin Wen & Guang Zhao

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

    Zhengyuan Chen & Shengsen Sun

Authors
  1. Zhengyuan Chen
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  2. Shengsen Sun
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  3. Huaimin Liu
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  4. Ziyan Deng
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  5. Gang Li
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  6. Shuopin Wen
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  7. Guang Zhao
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Corresponding authors

Correspondence to Zhengyuan Chen or Shengsen Sun.

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Cite this article

Chen, Z., Sun, S., Liu, H. et al. Time calibration of barrel TOF system at BESIII. Radiat Detect Technol Methods (2024). https://doi.org/10.1007/s41605-023-00445-6

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  • DOI: https://doi.org/10.1007/s41605-023-00445-6

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