Calibration of pulse transit time through a cable for EAS experiments

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QIAN Xiang-Li, CHANG Jin-Fan, FENG Cun-Feng, FENG Zhao-Yang, GOU Quan-Bu, GUO Yi-Qing, HU Hong-Bo, LIU Cheng, WANG Zheng, XUE Liang, ZHANG Xue-Yao and ZHANG Yi. Calibration of pulse transit time through a cable for EAS experiments[J]. Chinese Physics C, 2014, 38(6): 066202. doi: 10.1088/1674-1137/38/6/066202
QIAN Xiang-Li, CHANG Jin-Fan, FENG Cun-Feng, FENG Zhao-Yang, GOU Quan-Bu, GUO Yi-Qing, HU Hong-Bo, LIU Cheng, WANG Zheng, XUE Liang, ZHANG Xue-Yao and ZHANG Yi. Calibration of pulse transit time through a cable for EAS experiments[J]. Chinese Physics C, 2014, 38(6): 066202.  doi: 10.1088/1674-1137/38/6/066202 shu
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Received: 2013-07-30
Revised: 2013-10-08
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Calibration of pulse transit time through a cable for EAS experiments

    Corresponding author: ZHANG Yi,

Abstract: In ground-based extensive air shower experiments, the direction and energy are reconstructed by measuring the relative arrival time of secondary particles, and the energy they deposit. The measurement precision of the arrival time is crucial for determination of the angular resolution. For this purpose, we need to obtain a precise relative time offset for each detector and to apply the calibration process. The time offset is associated with the photomultiplier tube, cable, relevant electronic circuits, etc. In view of the transit time through long cables being heavily dependent on the ambient temperature, a real-time calibration method for the cable transit time is investigated in this paper. Even with a poor-resolution time-to-digital converter, this method can achieve high precision. This has been successfully demonstrated with the Front-End-Electronic board used in the Daya Bay neutrino experiment.

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