Abstract

PRISMA-32 (PRImary Spectrum Measurement Array) is working since 2012 in the Scientific & Educational Center NEVOD (NRNU ‘‘MEPhI’’, Moscow). Array area is \({\sim}500\) m\({}^{2}\). PRISMA-32 consists of 32 specially developed electron–neutron detectors capable to measure simultaneously electronic and hadronic components of the extensive air showers with energies above \(10^{14}\) eV. This feature is very important because hadronic component is a ‘‘skeleton’’ of the shower, and one can use measurements of hadron number along with simulations to recalculate primary energy spectrum independently or/and together with commonly used EAS size. Detailed Monte-Carlo simulation with CORSIKA and GEANT4 was performed and dependence of hadronic number on primary energy was obtained. Experimental data were processed and analyzed. Primary energy spectrum was recalculated from neutron number spectrum and it is in agreement with some other experiments at energies above \(10^{16}\) eV. The results of the analysis are presented.

中文翻译：

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用PRISMA-32阵列测量的“膝盖”上方的主要宇宙射线能谱

摘要

PRISMA-32（主频谱测量阵列）自2012年以来在NEVOD科学与教育中心（NRNU” MEPhI”，莫斯科）开始工作。数组面积为\（{\ sim} 500 \） m \（{} ^ {2} \）。PRISMA-32由32个专门开发的电子中子探测器组成，它们能够同时测量能量大于\（10 ^ {14} \）的大型空气喷淋器的电子和强子成分。eV。此功能非常重要，因为强子成分是淋浴的“骨架”，并且可以使用强子数的测量值以及模拟来独立地或/和/或与常用的EAS大小一起重新计算一次能谱。使用CORSIKA和GEANT4进行了详细的蒙特卡洛模拟，并获得了强子数对一次能量的依赖性。实验数据进行了处理和分析。从中子数谱重新计算了一次能谱，并且与其他实验在能量高于（（10 ^ {16} \） eV的情况下也是如此。给出了分析结果。