A preliminary simulation study of influence of backsplash on the plastic scintillator detector design in HERD experiment

Peng Hu; Zhi-gang Wang; Fabio Gargano; Francesca Alemanno; Corrado Altomare; Tian-wei Bao; Yong-wei Dong; Valerio Formato; Dimitrios Kyratzis; Nicola Mori; Lorenzo Pacini; Zheng Quan; Davide Serini; Jun-jing Wang; Rui-jie Wang; Ming Xu; Bo-bing Wu

doi:10.1007/s41605-021-00245-w

Volume 5 Issue 3

Sep. 2021

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Abstract

References

Radiation Detection Technology and Methods > 2021 > 5(3): 332-338 > doi: 10.1007/s41605-021-00245-w CSTR: 32043.14.s41605-021-00245-w

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A preliminary simulation study of influence of backsplash on the plastic scintillator detector design in HERD experiment

1. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China;
2. University of Chinese Academy of Sciences, Beijing, 100049, China;
3. Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Bari, 70126, Bari, Italy;
4. Gran Sasso Science Institute (GSSI), 67100, L’Aquila, Italy;
5. Istituto Nazionale di Fisica Nucleare (INFN), Laboratori Nazionali del Gran Sasso, 67100, L’Aquila, Italy;
6. Dipartimento Interateneo di Fisica dell’Università e del Politecnico di Bari, 70125, Bari, Italy;
7. Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Roma Tor Vergata, 00133, Rome, Italy;
8. Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Firenze, 50019, Sesto Fiorentino, Italy

Funds:

This research was supported by Youth Innovation Promotion Association, CAS

National Natural Science Foundation of China, Grant No. 12027803, U1731239

Key Research Program of Frontier Sciences, CAS, Grant No. QYZDY-SSW-SLH008.

More Information

Received Date: January 06, 2021
Revised Date: February 19, 2021
Accepted Date: February 27, 2021
Available Online: October 16, 2022
Published Date: March 28, 2021

Abstract

Abstract

Background The plastic scintillator detector (PSD) is one of the detectors in the high energy cosmic radiation detection (HERD) facility, which is designed for gamma-ray detection and a redundant charge measurement. Backsplash will lead to a decrease in PSD's performance of gamma-ray detection and charge measurement, which should be carefully considered.
Purpose Two preliminary segmentation schemes of the PSD and two veto strategies have been proposed to suppress the backsplash effect. In this paper, we focus on the influence of the backsplash caused by gamma rays. The gamma-ray trigger efficiency and identification efficiency were studied in the case of different cell sizes and veto strategies, which can provide guidance on the PSD design.
Methods A Monte Carlo simulation based on Geant4 has been performed. To simplify the simulation, the PSD is segmented into 1 cm³ cubes which can be easily aggregated into cells with different sizes during analysis.
Results and conclusion Side_Veto can be used as a baseline design of veto strategy, whereas Smart_Veto can be selected as an upgraded design. Both the PSD bar cell with a width of less than 11 cm and the PSD tile cell with a width of less than 20 cm can achieve a sufficiently high gamma-ray trigger efficiency (> 80%), which realizes the primary goal of the PSD. Meanwhile, both the PSD bar cell with a width of less than 3 cm and the PSD tile cell with a width of less than 20 cm can ensure a sufficiently high gamma-ray identification efficiency (> 80%) for photons up to 800 GeV.
- Plastic scintillator detector,
- Gamma-ray detection,
- Backsplash,
- Veto

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References (14)

References

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Peng Hu, Zhi-gang Wang, Fabio Gargano, et al. A preliminary simulation study of influence of backsplash on the plastic scintillator detector design in HERD experiment[J]. Radiation Detection Technology and Methods, 2021, 5(3): 332-338. DOI: 10.1007/s41605-021-00245-w

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