深空探测用塑料闪烁体阵列式缪子探测器电子学采集系统设计

Design of electronic acquisition system of muon detector with plastic scintillator array to be applied for deep space exploration

宇宙线缪子成像方法是一种对物质密度敏感的高分辨率、高精度被动源探测技术,无须原位测量,有望成为火星和小行星浅表和内部物质结构成分研究的新兴深空探测手段。鉴于气体探测器、核乳胶探测器使用条件的局限性,设计一种适用于深空探测的多通道读出的塑料闪烁体阵列式缪子探测器,可实现对多路探测器缪子信号的采集。搭建探测器测试系统,在实验室条件下进行天然缪子探测实验,对探测到的缪子数据进行天顶角和方位角分析,结果显示缪子径迹随角度分布与理论预期符合很好,初步验证了探测器系统设计的合理性。

The cosmic ray muon imaging method,as a high-resolution,high-precision passive detection technology,is sensitive to the density of matter and does not require the in-situ measurement,and it is expected to be an effective approach for the structure and the composition of the shallow surface and the internal matter of Mars and asteroids.In view of the limitation of the gas detectors and the liquid detectors,a multi-channel readout plastic scintillator array detector is designed for the acquisition of signals from multiple detectors.A detector system is set up to conduct the natural background muon detection experiments under laboratory conditions.and the zenith angle and the azimuth angle of the detected muon data are analyzed.It is shown that the angle distributions of the muon track are similar to those of the theoretical prediction,thus the applicability of the designed detector system is verified.