论文标题
Askaryan无线电检测器的改进触发因素
An improved trigger for Askaryan radio detectors
论文作者
论文摘要
高能中微子具有高于几美元的$ 10^{16} $ eV的高能中微子，可以通过冰的无线电检测器有效地测量，这些探测器补充了较高能量的光学探测器，例如IceCube等光学探测器。几个飞行员阵列在南极成功探索了无线电技术。由于中微子的通量低和相互作用的横截面，至关重要的是，尽可能提高无线电检测器的灵敏度。在此手稿中，系统地研究和优化了高能中微子的触发方法。我们发现，可以通过简单地将触发器的带宽限制为80 MHz和200 MHz之间的频率，而不是当前使用的80 MHz到〜1 GHz带宽，从而可以大大提高灵敏度（在$ 10^{17} $ eV和$ 10^{18} $ eV之间的50％以上（超过50％）。我们还比较了当前正在使用的不同触发方案（简单的幅度阈值，高/低阈值触发器和功率集成触发器），并发现执行最佳的方案取决于检测器的分散。这些发现为未来的Askaryan探测器的探测器设计提供了信息，可用于增加对高能中微子的敏感性，而无需任何额外的成本。这些发现也适用于分阶段数触发概念。
High-energy neutrinos with energies above a few $10^{16}$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 $10^{17}$eV and $10^{18}$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.
