核实验数据获取系统中的触发信号预处理

Trigger signal pre-processing in nuclear physics experiment data acquisition systems

简要介绍了在核物理实验数据获取系统中,用FPGA芯片和VHDL语言实现对事件触发信号的预处理。阐述了在核物理实验数据获取系统中对事件触发信号的一般要求;结合60 Co伽马谱测量实验,介绍了基于一套自主研发的数据获取系统中触发信号的预处理,并给出了用VHDL语言实现该触发信号预处理的思想、仿真时序图和实验结果。该方法通过实验验证,证明切实可行,灵活性强。

The realization of events trigger signal pre processing in the nuclear physics experiment data acquisition system is briefly introduced, by using the FPGA （field-programmable gate array） chips and VHDL language. The general requirements of trigger signal processing in nuclear physics experiment are listed. The ^60Co gamma spectra test experiment is introduced to detail these requirements. The trigger signal pre-processing in self-programming systems is presented. According to a given timing diagram, the trigger signal processing is realized with the VHDL language and FPGA technique. Through the actual waveform simu- lation and the experiments, this method is proved to be feasible and flexibility. This method can be of reference value for other da ta acquisition system trigger signal processing.