A Ground-Based Interferometric Phased Array Trigger for Ultra-high Energy Neutrinos
A Ground-Based Interferometric Phased Array Trigger for Ultra-high Energy Neutrinos
复制标题
用于超高能中微子的地基干涉相控阵触发器
DOI：
10.22323/1.301.1013
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
S. Wissel
中科院分区：
文献类型：
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作者：
A. Vieregg;P. Allison;K. Bechtol;M. Bogdan;C. Deaconu;M. DuVernois;A. Ludwig;E. Oberla;M. Ransom;A. Romero;K. Wei;S. Wissel
我们正在研制一种用于高能中微子射电探测的地基射电干涉相控阵，以降低射电探测实验的能量阈值，同时增加高能有效体积。无线电探测技术寻找来自大量冰川冰中相互作用的中微子的Askaryan发射。相控阵技术背后的原理是对来自多个天线通道的宽带脉冲Askaryan信号进行相干求和，从而提高在弱信号上触发的信噪比。我们首先讨论模拟和验证测量相关的相控阵技术，包括从初步的蒙特卡罗模拟的结果，在电波暗室中的热噪声相关性的波束形成和测量的演示，并从触发模拟的结果。然后，我们讨论了第一个地基干涉相控阵触发系统的设计和开发，这是一个16通道系统，已经建成，并将于2017年12月在南极部署为一个Askaryan无线电阵列（ARA）站的一部分。
We are developing a ground-based radio interferometric phased array for radio detection of high energy neutrinos, in an effort to lower the energy threshold of radio detection experiments while increasing the effective volume at high energies. The radio detection technique looks for Askaryan emission from neutrinos interacting in large volumes of glacial ice. The principle behind the phased array technique is coherent summing of the broadband, impulsive Askaryan signal from multiple antenna channels, increasing the signal-to-noise ratio for triggering on weak signals. We first discuss simulations and validation measurements related to the phased array technique, including results from a preliminary Monte Carlo simulation, a demonstration of beamforming and measurements of thermal noise correlation in an anechoic chamber, and results from a trigger simulation. We then discuss the design and development of the first ground-based interferometric phased array trigger system, a 16-channel system that has been built and will be deployed as part of one Askaryan Radio Array (ARA) station in December 2017 at the South Pole.