在Marambio南极基地用水-切伦科夫探测器观测的cosmic ray通量的周期性和各向异性的首次测量
First measurements of periodicities and anisotropies of cosmic ray flux observed with a water-Cherenkov detector at the Marambio Antarctic base
摘要：
位于阿根廷马兰比奥南极基地（64.24S-56.62W）的一个新的水-切伦科夫辐射探测器自2019年以来一直在监测银河宇宙线（GCR）通量的变化。其主要目的之一是提供必要的实验数据，以研究在不同空间/时间尺度的瞬变事件期间GCR的行星际运输。在本文中，我们提出的探测器和分析在一整年的观测。在分析和校正由于大气条件（压力和温度）的GCR通量变化之后，进行周期性的研究，以分析由于日光层现象的调制。我们可以观察到两个时期：（a）1天，与地球自转和GCR通量的空间各向异性有关;（b）$\sim$ 30天，由于太阳对稳定的太阳结构的影响和太阳自转。从叠加历元分析，并考虑地磁效应，平均周日振幅为$\sim$ 0.08%，最大流量观测在行星际空间的$\sim$ 15小时当地时间（LT）方向。在这样的方式中，我们确定的能力，神经观察各向异性和其他行星际调制的GCR通量到达地球。
英文摘要：
A new water-Cherenkov radiation detector, located at the Argentine Marambio Antarctic Base (64.24S-56.62W), has been monitoring the variability of galactic cosmic ray (GCR) flux since 2019. One of the main aims is to provide experimental data necessary to study interplanetary transport of GCRs during transient events at different space/time scales. In this paper we present the detector and analyze observations made during one full year. After the analysis and correction of the GCR flux variability due to the atmospheric conditions (pressure and temperature), a study of the periodicities is performed in order to analyze modulations due to heliospheric phenomena. We can observe two periods: (a) 1 day, associated with the Earth's rotation combined with the spatial anisotropy of the GCR flux; and (b) $\sim$ 30 days due to solar impact of stable solar structures combined with the rotation of the Sun. From a superposed epoch analysis, and considering the geomagnetic effects, the mean diurnal amplitude is $\sim$ 0.08% and the maximum flux is observed in $\sim$ 15 hr local time (LT) direction in the interplanetary space. In such a way, we determine the capability of Neurus to observe anisotropies and other interplanetary modulations on the GCR flux arriving at the Earth.
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