论文标题
测量混合CMOS检测器的软X射线量子效率
Measuring the Soft X-Ray Quantum Efficiency of a Hybrid CMOS Detector
论文作者
论文摘要
下一代X射线观测值，例如在未来十年的Lynx X射线观测员任务概念或其他类似概念，将需要在软X射线频段上具有高量子效率（QE）的检测器，以观察驱动其任务科学目标的微弱对象。混合CMOS检测器（HCD）是一种活跃像素传感器的一种形式，由于其快速读取，低功耗和内在的辐射硬度，因此有望在这些任务中使用。在这项工作中，我们介绍了使用气流比例计数器作为参考检测器进行的Teledyne H2RG HCD的量化量子测量值。我们发现，该探测器在软X射线频带上达到了高QE，QE的有效量化量子为$ 94.6 \ pm 1.1 \％$ $ $ $ n k $α$/k $β$ egergies（5.90/6.49 kev）（5.90/6.49 kev），$ 98.3 \ $ 98.3 \ pm 1.9 \ pm 1.9 \％1.9 \％$ a al k $ a $α$α$ at $ at $ et y o at o at $ et 1.49 kev） K $α$ Energy（0.52 KEV）和$ 61.3 \ pm 1.1 \％$在C K $α$ Energy（0.28 KEV）。基于检测层的吸收，这些值与我们的模型非常吻合。我们在仅考虑高质量事件的更严格分析中发现了类似的结果，在较低的能量下仅降低了量化宽松。
Next-generation X-ray observatories, such as the Lynx X-ray Observatory Mission Concept or other similar concepts in the coming decade, will require detectors with high quantum efficiency (QE) across the soft X-ray band to observe the faint objects that drive their mission science objectives. Hybrid CMOS Detectors (HCDs), a form of active-pixel sensor, are promising candidates for use on these missions because of their fast read-out, low power consumption, and intrinsic radiation hardness. In this work, we present QE measurements of a Teledyne H2RG HCD, performed using a gas-flow proportional counter as a reference detector. We find that this detector achieves high QE across the soft X-ray band, with an effective QE of $94.6 \pm 1.1 \%$ at the Mn K$α$/K$β$ energies (5.90/6.49 keV), $98.3 \pm 1.9 \%$ at the Al K$α$ energy (1.49 keV), $85.6 \pm 2.8 \%$ at the O K$α$ energy (0.52 keV), and $61.3 \pm 1.1 \%$ at the C K$α$ energy (0.28 keV). These values are in good agreement with our model, based on the absorption of detector layers. We find similar results in a more restrictive analysis considering only high-quality events, with only somewhat reduced QE at lower energies.
