大面积MRPC宇宙线缪子成像原型装置的研制

The Research and Development of a Prototype Cosmic Ray Muon Tomography Facility with Large Area MRPC Detectors

大面积位置灵敏探测器阵列是宇宙线缪子散射成像系统的关键部分。研发了适用于研制的73.6 cm×73.6 cm大面积二维读出位置灵敏MRPC探测器上的双精细复用读出电子学,构建了一个包括上下2组、每组各3块大面积MRPC的宇宙线缪子散射成像原型实验装置。该装置通过上下两块塑料闪烁体进行触发,实验数据经过处理后能重建缪子径迹,采用PoCA图像重建算法,获得了散射成像实验图像,结果与蒙特卡罗理论模拟结果相一致,为进一步研究宇宙线缪子成像物理机制、成像算法等提供了良好的实验平台。

The large area position sensitive detector arrays are the importance component of cosmic ray muon scattering tomography.In this work,a 73.6 cm × 73.6 cm large area MRPC detectors and the applicable double-fine encoding readout electronics have been developed and implemented.The prototype cosmic ray muon tomography facility with 2 sets of detectors,3 large area MRPC detectors each,has been established.With the trigger signals generated by the upper and lower plastic scintillators,the trajectories of muons can be reconstructed by acquiring and processing of the experimental data.Therefore,the experimental images of cosmic ray muon tomography based on MRPC detectors can be obtained by PoCA reconstruction algorithm.The experiment result is well consistent with the Monte Carlo simulation data.This successful prototype provides a platform for further studies of the physical characteristics and the image reconstruction algorithms of cosmic ray muon tomography.