混合CMOS探测器的精细亚像素空间分辨率研究
Exploring Fine Subpixel Spatial Resolution of Hybrid CMOS Detectors
摘要：
当X射线入射到探测器的硅吸收体阵列上时，它释放出大量的电子，这些电子倾向于向外扩散到所谓的电荷云中。这个数字可以在软X射线带通（0.1 - 10 keV）范围内从几十到几千不等。然后，电荷云可以由几个像素拾取，并根据X射线的确切入射位置形成特定的图案。我们在Bray 2018中展示了具有36微米像素的定制H2 RG的亚像素分辨率的实验结果，并将数据与模拟图像进行了比较。然后，我们将模型模拟应用于适合Lynx X射线探测器的原型小像素混合CMOS探测器（HCD）。我们还讨论了小像素探测器获得亚像素分辨率的能力。
英文摘要：
When an X-ray is incident onto the silicon absorber array of a detector, it liberates a large number of electrons, which tend to diffuse outward into what is referred to as the charge cloud. This number can vary from tens to thousands across the soft X-ray bandpass (0.1 - 10 keV). The charge cloud can then be picked up by several pixels, and forms a specific pattern based on the exact incident location of the X-ray. We present experimental results on subpixel resolution for a custom H2RG with 36 micron pixels, presented in Bray 2018, and compare the data to simulated images . We then apply the model simulation to a prototype small pixel hybrid CMOS detector (HCD) that would be suitable for the Lynx X-ray surveyor. We also discuss the ability of a small pixel detector to obtain subpixel resolution.
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