The results of Monte-Carlo simulations of extensive air showers are presented to show the difference of the hadronic component content at various altitudes with the aim to choose an optimal altitude for a PRISMA-like ...The results of Monte-Carlo simulations of extensive air showers are presented to show the difference of the hadronic component content at various altitudes with the aim to choose an optimal altitude for a PRISMA-like experiment. The CORSIKA program for EAS simulations with QGSJET and GHEISHA models was used to calculate the number of hadrons reaching the observational level inside a circle of 50 m radius around the EAS axis. Then the number of neutrons produced by the hadronic component was calculated using an empirical relationship between the two components. We have tested the results with the ProtoPRISMA array at sea level, and recorded the neutrons which are consistent with the simulation results.展开更多
为解决广延大气簇射热中子探测器阵列中16台探测器的32路输出信号的信号获取与数据处理问题,设计了一种适用于宽动态范围的信号获取电路,包括前端模拟电路和高速高精度模数转换电路。测试结果表明:整个电路的动态范围为5~2 000 m V,电...为解决广延大气簇射热中子探测器阵列中16台探测器的32路输出信号的信号获取与数据处理问题,设计了一种适用于宽动态范围的信号获取电路,包括前端模拟电路和高速高精度模数转换电路。测试结果表明:整个电路的动态范围为5~2 000 m V,电路噪声的方均根值小于0.8 m Vrms,5 m V输入信号分辨率小于12%,5 m V输入信号非线性程度小于20%。整体测试结果达到设计要求。展开更多
基金Supported by Russian Foundation for Basic Research(09-02-12380-ofi-m and 11-02-01479a),to the "Neutrino Program" of Russian Academy of Sciencesthe Federal Target Program "Scientific and Educational Cadres for Innovative Russia"NSFC(10835007)
文摘The results of Monte-Carlo simulations of extensive air showers are presented to show the difference of the hadronic component content at various altitudes with the aim to choose an optimal altitude for a PRISMA-like experiment. The CORSIKA program for EAS simulations with QGSJET and GHEISHA models was used to calculate the number of hadrons reaching the observational level inside a circle of 50 m radius around the EAS axis. Then the number of neutrons produced by the hadronic component was calculated using an empirical relationship between the two components. We have tested the results with the ProtoPRISMA array at sea level, and recorded the neutrons which are consistent with the simulation results.
文摘为解决广延大气簇射热中子探测器阵列中16台探测器的32路输出信号的信号获取与数据处理问题,设计了一种适用于宽动态范围的信号获取电路,包括前端模拟电路和高速高精度模数转换电路。测试结果表明:整个电路的动态范围为5~2 000 m V,电路噪声的方均根值小于0.8 m Vrms,5 m V输入信号分辨率小于12%,5 m V输入信号非线性程度小于20%。整体测试结果达到设计要求。
