AstroPix：研究硅像素传感器在未来Gamma-ray天体物理学中的潜力
AstroPix: Investigating the Potential of Silicon Pixel Sensors in the Future of Gamma-ray Astrophysics
摘要：
本文详细介绍了单片硅探测器ATLASPix的初步光子测量，ATLASPix是为CERN实验ATLAS构建和优化的像素探测器。本文的目标是确定像素化硅在未来空间伽马射线实验中的前景。考虑到这一目标，放射性光子源被用来确定ATLASPix的能量分辨率和探测器响应;这些是ATLASPix的新测量，ATLASPix是为地面粒子加速器建造的探测器。作为该项目的一部分，一个新的迭代单片硅像素，命名为AstroPix，已创建基于ATLASPix，并最终的目标是进一步优化AstroPix的伽玛射线探测通过构建一个原型Compton telescope.The能量分辨率的数字和模拟输出的ATLASPix是本文的重点，因为它是一个关键的康普顿望远镜的度量。结果发现，在探测器的模拟输出下，单个像素的能量分辨率在5.89 keV时为7.69 +/- 0.13%，在30.1 keV时为7.27 +/- 1.18%，这超过了60 keV时10%分辨率的保守基线要求，并且是一个令人鼓舞的开始，以实现60 keV时<2%分辨率的乐观目标。整个探测器的数字输出始终产生超过100%的不同来源的能量分辨率。单片硅像素的模拟输出表明，这是一个有前途的技术，为未来的伽马射线任务，而数字输出的分析点，需要重新设计未来的光子敏感单片硅像素探测器。
英文摘要：
This paper details preliminary photon measurements with the monolithic silicon detector ATLASPix, a pixel detector built and optimized for the CERN experiment ATLAS. The goal of this paper is to determine the promise of pixelated silicon in future space-based gamma-ray experiments. With this goal in mind, radioactive photon sources were used to determine the energy resolution and detector response of ATLASPix; these are novel measurements for ATLASPix, a detector built for a ground-based particle accelerator. As part of this project a new iteration of monolithic Si pixels, named AstroPix, have been created based on ATLASPix, and the eventual goal is to further optimize AstroPix for gamma-ray detection by constructing a prototype Compton telescope.The energy resolution of both the digital and analog output of ATLASPix is the focus of this paper, as it is a critical metric for Compton telescopes. It was found that with the analog output of the detector, the energyresolution of a single pixel was 7.69 +/- 0.13% at 5.89 keV and 7.27 +/- 1.18% at 30.1 keV, which exceeds the conservative baseline requirements of 10% resolution at 60 keV and is an encouraging start to an optimistic goal of<2% resolution at 60 keV. The digital output of the entire detector consistently yielded energy resolutions that exceeded 100% for different sources. The analog output of the monolithic silicon pixels indicates that thisis a promising technology for future gamma-ray missions, while the analysis of the digital output points to the need for a redesign of future photon-sensitive monolithic silicon pixel detectors.
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