CSNS靶站谱仪T0信号扇出设备研制

中国散裂中子源(Chinese Spallation Neutron Source, CSNS)靶站谱仪T0信号的高准确性和高可靠性是CSNS高效运行的重要条件之一。基于CPLD(Complex Programmable Logic Device)和PMC(Peripheral Mezzanine Card)子母板组合，设计了满足分布式架构的T0信号扇出设备，自主研制了24 V电平触发的中子斩波器专用触发信号接收插件；在1.6 GeV质子束首次打靶前，对T0信号延迟及信号调理做了优化。T0信号扇出设备接口信号灵活多变，具有较强的可维护性和可扩展性，已投入使用近三年，系统稳定可靠，为今后二期谱仪更高需求的T0信号扇出设备的研发积累了宝贵的建设经验。

Design of CSNS Spectrometer T0 Signal Fan-out Equipment

The high accuracy and reliability of the T0 signals is one of the most important prerequisites for Chinese Spallation Neutron Source(CSNS) target station spectrometer. Based on the CPLD(Complex Programmable Logic Device) and PMC(Peripheral Mezzanine Card) mother-daughter structure, T0 signal fan-out instruments were designed with a distributed architecture, including a special trigger signal receiver for the neutron chopper with 24 V level trigger. Before the first 1.6 GeV proton beam hits the target, the delay of all T0 signals have been adjusted correctly. These T0 signal fan-out instruments have superior flexibility, maintainability, scalability, which have been working for more than three years, and the whole T0 timing system has run smoothly and achieved high reliability. It has accumulated valuable experience for the higher demand of T0 signal fan-out instruments at the second phase spectrometer in the future.