AI 中文总结
RNO - G 正在建设中，已部署 8 个站点。设计并部署基于延迟求和波束形成和功率积分的 PA 触发器，通过抑制热噪声等提高性能。经测试和模拟，信噪比降低 25%，模拟与实测相符，该触发器显著增加有效体积。
AI 中文摘要
格陵兰岛的无线电中微子观测站（RNO - G）是一个正在 Summit 站建设的中微子探测器，计划中的 35 个站点目前已部署 8 个。我们设计并部署了一种基于延迟求和波束形成和功率积分的新型相控阵（PA）触发器。该触发器通过抑制热噪声和更好地瞄准中微子诱发的阿斯塔里安信号来提高探测器性能。自 2025 赛季以来已部署新的 PA 触发器。利用测试脉冲和校准脉冲发生器在实验室和现场对触发器性能进行了表征，发现这些测试中触发信号所需的信噪比平均降低了 25%。模拟结果与探测器情况相符，模拟触发效率与测量数据相差在 10%以内。在现场触发验证后，我们使用数据驱动的触发性能来为探测器有效体积的模拟提供信息。PA 触发器显著增加了有效体积，在 0.1 EeV 以下增加了 2 倍多，在 100 EeV 的最高能量下至少增加了 1.3 倍。
英文摘要
The Radio Neutrino Observatory in Greenland (RNO-G) is a neutrino detector under construction at Summit Station, with 8 out of a planned 35 stations currently deployed. We have designed and deployed a new phased array (PA) trigger based on delay-and-sum beamforming and power integration. This trigger improves detector performance by suppressing thermal noise and better targeting neutrino-induced Askaryan signals. The new PA trigger has been deployed since the 2025 season. The trigger performance has been characterized using test pulses and calibration pulsers both in the lab and in-situ, and we find across these tests a 25% average reduction in the signal-to-noise ratio (SNR) needed to trigger on signals. Simulations are shown to be representative of the detector, and simulated trigger efficiencies are within 10% of measured data. Following the in-situ trigger validation, we use data-driven trigger performance to inform simulations of the detector effective volumes. The PA trigger increases our effective volume significantly, by over a factor of 2 below 0.1 EeV and at least a factor of 1.3 at the highest energies of 100 EeV.
Comments27 pages, 17 figures, to be submitted to JINST
