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主要阐述了北京谱仪Ⅲ(BESⅢ)事例起始时间计算系统的基本原理和程序结构;利用MDC径迹、TOF信息联合计算方法和单独使用MDC方法完成BESⅢ事例起始时间的计算。通过蒙特卡罗数据,包括对撞事例和宇宙线事例的运行、检验和调试,证明了系统是稳定和可靠的。
Mainly introduces the basic principles and program structure of the BES III case starting time calculation system; the calculation of the start time of BES Ⅲ cases is completed by using MDC track, TOF information combined calculation method and MDC alone method. The Monte Carlo data, including the operation of collision cases and cosmic ray cases, inspection and commissioning, proves that the system is stable and reliable.