Development of a time calibration system for the KLM upgrade in the Belle II experiment
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866912914408996864 |
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| author | Liu, Ziyu Wang, Xiyang Zou, Shiming Wang, Xiaolong Yin, Junhao Zhao, Minggang |
| author_facet | Liu, Ziyu Wang, Xiyang Zou, Shiming Wang, Xiaolong Yin, Junhao Zhao, Minggang |
| contents | To meet the stringent time calibration requirements for the Belle II experiment upgrade, particularly for its large-size KL and Muon Detector comprising tens of thousands of scintillator channels with time resolutions better than 100 ps, we developed a compact and high-speed time calibration system. The system utilizes a laser diode as its light source, integrated with a fast pulse laser drive circuit that employs high-speed switching GaN FETs and gate drivers. A prototype was constructed and rigorously evaluated using scintillators, achieving timing resolutions of about 13 ps for a single calibration channel. Furthermore, internal deviations among calibration channels were analyzed, with most measurements remaining within 250 ps. These results highlight the system's precision, scalability, and suitability for large-scale particle physics experiments. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_20029 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Development of a time calibration system for the KLM upgrade in the Belle II experiment Liu, Ziyu Wang, Xiyang Zou, Shiming Wang, Xiaolong Yin, Junhao Zhao, Minggang Instrumentation and Detectors To meet the stringent time calibration requirements for the Belle II experiment upgrade, particularly for its large-size KL and Muon Detector comprising tens of thousands of scintillator channels with time resolutions better than 100 ps, we developed a compact and high-speed time calibration system. The system utilizes a laser diode as its light source, integrated with a fast pulse laser drive circuit that employs high-speed switching GaN FETs and gate drivers. A prototype was constructed and rigorously evaluated using scintillators, achieving timing resolutions of about 13 ps for a single calibration channel. Furthermore, internal deviations among calibration channels were analyzed, with most measurements remaining within 250 ps. These results highlight the system's precision, scalability, and suitability for large-scale particle physics experiments. |
| title | Development of a time calibration system for the KLM upgrade in the Belle II experiment |
| topic | Instrumentation and Detectors |
| url | https://arxiv.org/abs/2509.20029 |