Time calibration of barrel TOF system at BESIII

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

doi:10.1007/s41605-023-00445-6

Volume 8 Issue 2

Jun. 2024

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Abstract

References

Radiation Detection Technology and Methods > 2024 > 8(2): 1264-1271 > doi: 10.1007/s41605-023-00445-6

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Time calibration of barrel TOF system at BESIII

1 Institute of High Energy Physics Chinese Academy of Sciences, Beijing 100049, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China

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

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Received Date: May 02, 2023
Revised Date: December 12, 2023
Accepted Date: December 20, 2023
Published Date: January 23, 2024

Abstract

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.
- Time calibration,
- Boosted decision trees,
- Time of flight,
- BESIII

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References (12)

References

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Zhengyuan Chen, Shengsen Sun, Huaimin Liu, et al. Time calibration of barrel TOF system at BESIII[J]. Radiation Detection Technology and Methods, 2024, 8(2): 1264-1271. DOI: 10.1007/s41605-023-00445-6

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