High-energy neutrinos with energies above a few 10¹⁶ eV can be measured efficiently with in-ice radio detectors which complement optical detectors such as IceCube at higher energies. Several pilot arrays explore the radio technology successfully in Antarctica. Because of the low flux and interaction cross-section of neutrinos it is vital to increase the sensitivity of the radio detector as much as possible. In this manuscript, different approaches to trigger on high-energy neutrinos are systematically studied and optimized. We find that the sensitivity can be improved substantially (by more than 50% between 10¹⁷ eV and 10¹⁸ eV) by simply restricting the bandwidth in the trigger to frequencies between 80 MHz and 200 MHz instead of the currently used 80 MHz to ∼ 1 GHz bandwidth. We also compare different trigger schemes that are currently being used (a simple amplitude threshold, a high/low threshold trigger and a power-integration trigger) and find that the scheme that performs best depends on the dispersion of the detector. These findings inform the detector design of future Askaryan detectors and can be used to increase the sensitivity to high-energy neutrinos significantly without any additional costs. The findings also apply to the phased array trigger concept.

^{能量高于几个 10 16} eV的高能中微子可以使用冰内无线电探测器有效测量，该探测器补充了诸如 IceCube 等更高能量的光学探测器。几个试点阵列在南极洲成功地探索了无线电技术。由于中微子的低通量和相互作用截面，尽可能提高无线电探测器的灵敏度至关重要。在这份手稿中，系统地研究和优化了触发高能中微子的不同方法。我们发现灵敏度可以显着提高（在 10 ¹⁷ eV 和 10 ¹⁸eV) 通过简单地将触发器中的带宽限制在 80 MHz 到 200 MHz 之间的频率，而不是当前使用的 80 MHz 到 ~ 1 GHz 带宽。我们还比较了当前使用的不同触发方案（简单幅度阈值、高/低阈值触发和功率积分触发），并发现性能最佳的方案取决于探测器的色散。这些发现为未来 Askaryan 探测器的探测器设计提供了信息，并可用于显着提高对高能中微子的灵敏度，而无需任何额外成本。这些发现也适用于相控阵触发概念。