粒子物理学是在微观领域研究物质基本构成、相互作用以及自然界最基本规律的前沿基础学科。新一代基于加速器的粒子物理实验将运行在更高的能量和亮度，这意味着更高的末态粒子产额和动量，更短的响应时间和更高的本底水平，对实验探测系统的提出更苛刻的要求。飞行时间探测是粒子鉴别和测量的重要手段，高分辨时间测量技术在核与粒子物理实验等领域有极大的应用前景。新一代粒子物理实验及应用领域的快速发展对定时测量技术提出了更高的性能要求：好于30皮秒。本项目拟研发下一代超高分辨定时探测技术，包括内反射契伦科夫探测器技术、快响应位敏型单光子探测技术和超高精度定时测量电子学技术。研制一台多通道大面积超高分辨定时探测系统样机，系统时间分辨达到或好于30皮秒，比现有飞行时间探测装置性能提高一倍以上，同时满足高计数率和抗辐照的要求。项目研究成果将为我国下一代核与粒子物理实验提供关键技术支撑。

Particle physics focuses on microcosmic research on the basic composition of matter, the interaction between them and the fundamental laws of nature. Accelerator based experiment is considered to be the most effective way to study particle physics. The new generation of particle physics experiments will run at unprecedented high energy and luminosity, which means higher final state particle yield and momentum range, shorter response time and higher background level, therefore more stringent requirements for the experimental detector system. Time-of-flight (TOF) is an important method for particle identification. High resolution timing technology has great application prospects in nuclear and particle physics experiments and other fields, including nuclear medical imaging. The new generation of particle physics experiments generally require a timing resolution better than 30 ps. In this project, we intend to develop the next generation of ultra-high resolution timing technology, including internally reflected Cherenkov detection, fast response position sensitive single-photon detection and ultra-high precision timing measurement electronics. On this basis, a prototype of a multi-channel large-area ultra-high resolution timing demonstrator will be developed. The expected time resolution of the system is better than 30 ps, which is twice better than the performance of existing TOF devices. At the same time, it can meet the requirements of high counting rate and radiation resistance. The research results of the project will provide key technical support for the next generation nuclear and particle physics experiments in China, and can also be applied to positron emission tomography and other applications.