Concept Study for the Beamforming Elevated Array for Cosmic Neutrinos (BEACON)
Concept Study for the Beamforming Elevated Array for Cosmic Neutrinos (BEACON)
复制标题
宇宙中微子波束形成高架阵列（BEACON）的概念研究
DOI：
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
E. Zas
中科院分区：
文献类型：
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作者：
S. Wissel;J. Alvarez;C. Burch;A. Cummings;W. Carvalho;C. Deaconu;G. Hallinan;K. Hughes;A. Ludwig;E. Oberla;C. Paciaroni;A. Rodriguez;A. Romero;H. Schoorlemmer;D. Southall;B. Strutt;Mercedes Vasquez;A. Vieregg;E. Zas
预计Tau中微子将占天体物理和宇宙中微子通量的三分之一，但目前风味比的限制很差，能量为bbb100 PeV的预期通量很低。我们提出了一种名为BEACON的无线电探测器的新概念，该探测器对能量大于100 PeV的tau中微子敏感，其中无线电干涉仪从高海拔山上搜索上升的tau中微子。来自多个天线的信号在触发级进行相干求和，不仅允许人为背景的定向屏蔽，而且还允许较低的触发阈值。仿真研究表明，只要接收机处于足够高的高度，适当的阵列尺寸和少量的台站就可以达到竞争灵敏度。作为概念验证，在白山研究站部署了一个由四个30-80 MHz双极化天线组成的阵列。
Tau neutrinos are expected to comprise one third of both the astrophysical and cosmogenic neutrino flux, but currently the flavor ratio is poorly constrained and the expected flux at energies >100 PeV is low. We present a new concept for a radio detector called BEACON sensitive to tau neutrinos with energies greater than 100 PeV in which a radio interferometer searches for upgoing tau neutrinos from a high elevation mountain. Signals from several antennas are coherently summed at the trigger level, permitting not only directional masking of anthropogenic backgrounds, but also a lower trigger threshold. Simulation studies indicate that a modest array size and small number of stations can achieve competitive sensitivity, provided the receivers are at high enough elevation. As a proof of concept, an array of four 30-80 MHz dual polarized antennas was deployed at the White Mountain Research Station.