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WILLI-EAS, a detector for observing atmospheric and EAS muons

机译:WILLI-EAS,用于观测大气和EAS介子的探测器

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The central part of WILLI - EAS is a compact calorimeter type detector set up for measuring the inclusiveflux and the charge ratio of atmospheric muons in various directions of muon incidence. A mini array EAS is added andgoing to be operated for registering extensive air showers in order to study the muon charge ratio in EAS as affectedby the geomagnetic field. The observed muon charge ratio measured for incident muons with energy < 1 GeV exhibitsa pronounced azimuthal asymmetry (East-West effect) due to the different influence of the geomagnetic field on thetrajectories of positive and negative muons in air. The flux measurements performed with the WILLI detector, taking intoaccount muon events with energies > 0.4 GeV, show a diurnal modulation of the muon flux. The analysis of the muonevents for energies < 0.6 GeV reveals an aperiodic variation of the muon flux. The WILLI detector has been extended toWILLI-EAS with 12 detector stations arranged as an rray. Simulations studies of the muon charge ratio for the correlatedEAS, (initiated by H and Fe primaries, with energies in a range 1013eV - 1015eV), show detailed effects of the directionof EAS incidence relative to the geomagnetic field, depending, in particular, of the primary mass.
机译:WILLI-EAS的中心部分是一个紧凑的量热计式检测器,用于检测不同方向上的μ子的包容通量和大气μ子的电荷比。添加了一个微型阵列EAS并开始运行以注册大量的风淋,以研究EAS中受地磁场影响的μ子电荷比。由于地磁场对空气中正负介子轨迹的影响不同,因此观察到的能量小于1 GeV的入射μ子所测得的μ子电荷比具有明显的方位不对称性(东西方效应)。使用WILLI检测器进行的通量测量,考虑到能量> 0.4 GeV的μ子事件,显示出对μ子通量的昼夜调制。对能量<0.6 GeV的muonevents的分析显示出μon通量的非周期性变化。 WILLI检测器已扩展为WILLI-EAS,具有12个排列成阵列的检测器站。对相关EAS的μ子电荷比的模拟研究(由H和Fe原核引发,能量在1013eV-1015eV范围内)显示了EAS入射方向相对于地磁场的详细影响,特别是取决于初级肿块。

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