大亚湾反应堆中微子实验触发系统的时钟检错功能

Clock Alarm Function in Trigger System of Daya Bay Reactor Neutrino Experiment

大亚湾反应堆中微子实验的时钟系统为实验的电子学提供频率精确、运行稳定的同步工作时钟,确保电子学采集到正确有效的数据。但是一些不可预测的干扰有可能导致时钟系统突然不能提供时钟,或者时钟频率产生偏差,时钟的出错状态会给数据分析带来不良的影响,降低实验精度,甚至数据含义错误,不能进行分析。根据时钟丢失和恢复时的信号情况,利用时钟系统和触发系统已有的资源,在触发系统中设计并实现了时钟检错功能。该功能已经得到正确的应用,并为实验中的各相关设备提供时钟检错信号。

The clock system of Daya Bay reactor neutrino experiments provides precise clock and time stamps to the electronic system, When the clock system stops sending clock and time stamps for some unpredictable rea- sons, the electronics system cannot acquire data from detectors conrectly. It will cause an impact on data acqui- sition and analysis. The clock alarm function in the trigger system is therefore designed for monitoring the clock condition and providing clock alarm signals if any error is found.