标题： GRANDProto300：现状、科学案例与前景 显示英文标题

标题： GRANDProto300: status, science case, and prospects

摘要： GRANDProto300 是 GRAND 实验的中型原型装置，计划在$200\, \rm km^{2}$部署一个由 300 个天线组成的无线电阵列，并于$\sim 2026$在中国小独山的无线电安静区完成部署。 该阵列将作为 GRAND 实验的测试平台，旨在实现大型阵列中非常倾斜的空气簇射的自主无线电探测和重建。 GRANDProto300 将检测能量范围为$10^{16.5}-10^{18}\, \rm eV$的超高能宇宙射线，其检测率与 Auger 相当。 GRANDProto300 还可能包含一个地面粒子阵列，用于验证无线电探测器的性能。 我们讨论了探测器调试的当前状态以及 GRANDProto300 所带来的丰富科学案例，涵盖了银河系到星系际过渡、快速射电暴和超高能伽马射线的研究。 显示英文摘要

摘要： GRANDProto300, the mid-scale prototype of the GRAND experiment, is a planned radio array of 300 antennas over $200\, \rm km^{2}$ that will be deployed in the radio-quiet location of Xiao Dushan (China) by $\sim 2026$. The array will act as a test bench for the GRAND experiment and aim to achieve autonomous radio-detection and reconstructions of very inclined air showers in a large-scale array. GRANDProto300 will detect ultra-high-energy cosmic rays in the energy range $10^{16.5}-10^{18}\, \rm eV$ at a rate comparable to Auger. GRANDProto300 could also contain a ground particle array that would validate the performances of the radio detectors. We discuss the current status of the detector commissioning and the rich science case made possible by GRANDProto300, which covers the study of the Galactic-to-extragalactic transition, fast radio bursts and ultra-high-energy gamma-rays.