The CHIPS R&D project aims to develop affordable water Cherenkov detectors for large-scale underwater installations. In 2019, a 5kt prototype detector CHIPS-5 was deployed in northern Minnesota to study neutrinos generated by the nearby NuMI beam. This contribution presents a dedicated low-latency time distribution system for CHIPS-5 that delivers timing signals from the Fermilab accelerator to the detector with sub-nanosecond precision. Exploiting existing NOvA infrastructure, the time distribution system achieves this only with open-source software and conventional network elements. In a time-of-flight study, the presented system has reliably offered a time budget of $610 \pm 330\text{ ms}$ for on-site triggering. This permits advanced analysis in real-time as well as a novel hardware-assisted active triggering mode, which reduces DAQ computing load and network bandwidth outside triggered time windows.

中文翻译：

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用于 CHIPS-5 中微子探测器的低延迟 NuMI 触发器

CHIPS 研发项目旨在为大型水下装置开发经济实惠的水切伦科夫探测器。2019 年，明尼苏达州北部部署了 5kt 原型探测器 CHIPS-5，用于研究附近 NuMI 光束产生的中微子。该贡献为 CHIPS-5 提供了一个专用的低延迟时间分配系统，该系统以亚纳秒精度将计时信号从费米实验室加速器传送到探测器。利用现有的 NOvA 基础设施，时间分配系统只能通过开源软件和传统网络元素来实现。在飞行时间研究中，所提出的系统可靠地为现场触发提供了 610 美元 \pm 330\text{ ms}$ 的时间预算。这允许实时高级分析以及新颖的硬件辅助主动触发模式，